Manual No. A8926
®
GENERAC ENGINES
Overhead Valve
Industrial
Owner’s Manual
Model No. 190/220 (6.5/7.8 Horsepower)
THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS, WHICH, IF NOT FOLLOWED, COULD ENDANGER
THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL
INSTRUCTIONS IN THE MANUAL BEFORE ATTEMPTING TO OPERATE THIS UNIT.
Revision 0 (11/16/98)
Printed in U.S.A.
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Generac GN-190/220 Engine
• Do not overfill the fuel tank. Always allow room for fuel
expansion. If the tank is overfilled, the fuel can overflow onto
a hot engine and cause a FIRE or an EXPLOSION.
• Do not insert any object through the cooling slots of the
engine. You could damage the equipment or injure yourself.
• Do not operate the engine faster than the speed necessary to
operate the equipment. Do not run the engine at high speed
when not operating the equipment.
• Allow at least two (2) feet of clearance on all sides of the
engine, even while operating it outdoors, or you could damage
the engine.
• This engine requires an adequate flow of cooling air for its
continued proper operation. Never operate the equipment
inside any room or enclosure where the free flow of cooling air
into and out of the equipment might be obstructed. Without
sufficient cooling air flow, the engine quickly overheats,
damaging the engine or nearby property.
• Thoroughly inspect the engine for loose or damaged parts
before each use. Do not use the engine until adjustments or
repairs are made.
• Check the oil level in the engine before each use.
• Inspect the engine periodically. Repair or replace all damaged
or defective parts immediately.
• Do not smoke around the engine. Wipe up any fuel or oil spills
immediately. Never leave oily or fuel soaked rags around the
engine. Keep the area around the engine clean and free of
debris.
• Inspect fuel system frequently for leaks or damage. Repair or
replace any damaged or leaking component immediately.
Never attempt to change, alter or modify the engine fuel
system in any way that might affect safety or compliance with
applicable codes and standards.
• Keep hands, feet, clothing, etc., away from moving parts of this
engine.
• Never operate the engine (a) in the rain; (b) in any enclosed
compartment; (c) if the engine speed changes; (d) if the engine
sparks; (e) if flame or smoke is observed while the engine is
running.
WHILE OPERATING
• This engine was designed and manufactured for specific
applications. Do not attempt to modify the equipment or
use it for any application for which it was not designed.
• Never work on this engine or handle any electrical device while
standing in water, while barefoot, or while hands or feet are
wet. DANGEROUS ELECTRIC SHOCK will result.
• Engine exhaust gases contain DEADLY carbon monoxide
gas. This dangerous gas, if breathed in sufficient
concentrations, can cause unconsciousness or even death.
Operate this equipment only in the open air where adequate
ventilation is available.
— 3 —
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Generac GN-190/220 Engine
This engine meets the 1998 and later California emissions
regulations. To ensure that your engine continues to meet
these regulations, refer to the following information and
instructions in this owner’s manual.
TABLE OF CONTENTS
RULES FOR SAFE OPERATION ........................................2-3
GENERAL INFORMATION..................................................4-5
Service Information ..................................................................4
Engine Identification Decal Location ........................................4
Oil and Fuel Information............................................................5
SERVICE INFORMATION
Service on this engine within and after the warranty
period can be performed by any authorized service
dealer. Service technicians are factory trained and
capable of handling all service needs.
OPERATION ........................................................................6-7
Before Starting the Engine ........................................................6
Starting the Engine ................................................................6-7
Stopping the Engine..................................................................7
Low Pressure Shutdown System ..............................................7
When contacting an authorized service dealer or the
factory about parts and service, always supply the
complete model number and serial number of your unit as
given on its data plate decal.
MAINTENANCE ................................................................8-13
General Maintenance Recommendations ................................8
Service and Adjustments ....................................................8-10
Carburetor Adjustments ..........................................................11
Checking/Adjusting Valve to Rocker Arm Clearance ..............11
Retorquing Head Bolts ............................................................12
Maintenance Schedule............................................................12
Storage Instructions ................................................................13
Specifications ..........................................................................13
The warranty and replacement parts for this engine are
included in the owner’s manual.
When ordering engine components, you must provide the
authorized service dealer with the engine identification number,
which is located on the engine identification decal. See the
illustration below for the location of the decal.
PARTS LISTS & EXPLODED VIEWS ....................14-21
WARRANTIES ................................................................22-24
California Emission Control Warranty Statement ....................22
Emission Control System Warranty ........................................23
Generac Engine Warranty ........................................Back Cover
Generac Corporation
Eng. Identif. No. XXXXXX
Displacement
XXXXXX
Decal
— 4 —
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Generac GN- 190/220 Engine
The recommended oils include the following:
• During summer months: SAE 10W-30,
OIL AND FUEL INFORMATION
NOTE: BE SURE TO READ THESE INSTRUCTIONS
CAREFULLY BEFORE ATTEMPTING TO START OR
OPERATE THIS EQUIPMENT. Using old or improper oil or
fuel can cause engine damage.
• During winter months: SAE 5W-20 or 5W-30. DO NOT USE
SAE 10W-40.
The crankcase oil capacity is about 770 ml (29 oz.) with the oil
filter. Without the filter, the oil capacity is 620ml (21 oz.). Use no
special additives.
CAUTION: Any attempt to crank or start the engine
before it has been properly serviced with the
recommended oil may result in engine damage.
RECOMMENDED FUEL TYPE
Use clean, fresh, regular UNLEADED gasoline with this engine.
RECOMMENDED OIL TYPE
CAUTION: Do not overfill the fuel tank. Always allow
room for fuel expansion.
Using the proper type and weight of oil in the crankcase is
extremely important. Check the oil before each use and change
the oil regularly. Failure to use the correct oil, or using dirty oil,
can cause premature engine wear and failure.
WARNING: NEVER FILL THE FUEL TANK INDOORS. OR
WHEN THE ENGINE IS RUNNING OR HOT. DO NOT
LIGHT A CIGARETTE OR SMOKE WHEN FILLING THE
FUEL TANK.
— 5 —
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Generac GN-190/220 Engine
OPERATION AND MAINTENANCE
STARTING THE ENGINE
It is the owner’s/operator's responsibility to perform all safety
checks; to make sure that all maintenance for safe operation is
performed promptly; and to have the engine checked by an
authorized dealer periodically. Normal maintenance service and
replacement of parts are the responsibility of the owner/operator
and, as such, are not considered defects in materials or
workmanship within the terms of the warranty. Individual
operating habits and usage contribute to the need for
maintenance service.
1. Open the fuel shut-off valve, if so equipped.
2. If your unit is equipped with the IDLE/CONTROL feature,
locate the IDLE/CONTROL ON/OFF SWITCH on the control
panel, and set it to the OFF (O) position.
3. Locate the RUN/STOP SWITCH (Figure 2) next to the
engine cylinder head and push it to RUN.
Figure 2 — RUN/STOP SWITCH
Proper maintenance and care of your engine assures a minimum
number of problems and keeps your operating expenses at a
minimum. See your authorized dealer/distributor for service aids
and accessories.
RUN
S
STOP
BEFORE STARTING THE ENGINE
Perform the following tasks before trying to start the engine:
L
O
W
OIL
INDITOR
CA
ADDING ENGINE OIL
1. Remove the yellow oil fill cap from the crankcase (Figure 1).
2. Add engine oil until the oil level is to the point of overflowing.
If your engine is equipped with a choke, use the
following instructions:
Figure 1 — Oil Fill Cap
1. Place the choke lever in the FULL CHOKE POSITION
(Figure 3) by sliding it to the left (towards the valve cover),
in the direction indicated by the arrow.
Figure 3 — Choke Positions
Oil Fill
Cap
CHOKE
CHECKING ENGINE OIL
1. Check the engine oil level before starting the engine each
time after the initial start. If the oil level is below the point of
overflowing, fill to the proper level.
2. Grasp the recoil handle (Figure 4) and pull it slowly until you
ADDING FUEL
1. Fill the fuel tank using clean, fresh UNLEADED gasoline.
feel slight resistance, then PULL QUICKLY.
— 6 —
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Generac GN-190/200 Engine
A
If the engine FAILS TO START, go to Step 3.
2. Grasp the recoil handle (see Figure 4) and pull it slowly until
you feel slight resistance, then PULL QUICKLY. Repeat
pulling the recoil handle three (3) times, if necessary.
B. If the engine STARTS, go to Step 4.
Figure 4 — Recoil Handle
3. If the engine FAILS TO START, repeat Steps 1 and 2.
4. Allow the engine to warm up for two (2) minutes before using
the equipment.
STOPPING THE ENGINE
1. Remove the load on the engine, and let it run for 30
seconds.
Recoil
Handle
2. Turn off the engine by moving the RUN/STOP SWITCH to
the STOP position.
3. Close the fuel shut-off valve, if so equipped.
LOW PRESSURE SHUTDOWN SYSTEM
The engine is equipped with a low oil pressure sensor that shuts
down the engine automatically when the oil pressure drops below 8
psi. If the engine shuts down by itself and the fuel tank has enough
gasoline, check the engine oil level.
3. Move the choke lever to the HALF CHOKE POSITION,
and pull the recoil handle (Figure 4) two (2) times.
•
If the engine STILL FAILS TO START, repeat
Steps 1-3.
INITIAL STARTUP
A delay built in the shutdown system allows oil pressure to build
during starting. The delay allows the engine to run for about 10
seconds before sensing oil pressure.
4. Move the choke lever to the RUN POSITION by sliding it
to the right (away from the valve cover and under the
arrow).
5. Allow the engine to warm up for two (2) minutes before
using the equipment.
SENSING LOW PRESSURE
If the system senses low oil pressure during operation, the
engine shuts down. As the system shuts down, the low oil light
comes ON (see Figure 2, page 6 ). However, once the engine
stops rotating, this light will go OFF.
If this engine is equipped with a primer bulb, use
the following instructions.
1. Press the primer bulb three (3) times, waiting two (2)
seconds between each push (Figure 5).
RESTARTING THE ENGINE
If you try to restart the engine within 5 seconds after it shuts
down, the engine may NOT start. The system needs 5 to 10
seconds to reset.
Figure 5 — Pressing the Primer Bulb
NOTE: If you do restart engine after a shutdown and have not
corrected the low oil pressure, the engine will run for
about 10 seconds as described above,and then it will stop.
— 7 —
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Generac GN-190/220 Engine
2. When the oil is drained, install and tighten the oil drain
plug.
GENERAL MAINTENANCE
RECOMMENDATIONS
3. If your engine is equipped with an oil filter, use the
following instructions:
The owner/operator is responsible for making sure that all periodic
maintenance tasks are completed on a timely basis; that all
discrepancies are corrected; and that the equipment is kept clean
and properly stored. Never operate a damaged or defective
engine.
A. Place a suitable container beneath the oil filter and
turn the filter counterclockwise to remove the filter.
B. Coat the gasket of a new filter with engine oil. Turn
the new filter clockwise until the gasket contacts the
filter adapter, then tighten an additional 3/4 turn.
CAUTION: Disconnect the spark plug wire from the spark
plug, and place the wire where it cannot come in contact with
the spark plug before working on this engine.
4. Remove the oil fill plug and insert a clean funnel into the
plug opening. Fill the crankcase with the recommended
oil until the oil level is at point of overflowing. Approxi-
mately 620ml (21 oz.) are required without an oil filter;
770ml (29 oz.) with an oil filter. POUR SLOWLY.
CHECKING THE OIL LEVEL
See the BEFORE STARTING THE ENGINE section on page 6 for
information on checking the oil level. The oil level should be
checked before each use, or at least every eight (8) hours of
operation. Keep the oil level maintained.
5. When the crankcase is filled to the proper level, install
and tighten the oil fill plug.
CHANGING THE OIL AND OIL FILTER
SERVICING THE AIR CLEANER.
Your equipment’s air cleaner is one of the most important
areas to maintain. This engine will not run properly and may
get damaged if it is run with a dirty air cleaner system.
Your engine may be equipped with an oil filter. Change the oil and
filter after the first eight (8) hours of operation. Change the oil
and oil filter (if so equipped) every 50 hours thereafter. If you are
using this engine under dirty or dusty conditions, or in extremely
hot weather, change the oil more often.
Clean or replace the paper air filter (Figure 7) every 50
hours of operation or once a year, whichever comes first.
Clean or replace the filter more often if the engine is operated
under dusty or dirty conditions. Clean the foam pre-filter
every 25 hours of operation, or sooner under dusty or dirty
conditions.
Use the following instructions to change the oil while the engine is
still warm:
1. Clean the area around the oil drain plug, remove the plug and
drain the oil completely into a suitable container (Figure 6).
Figure 6 — Oil Filter and Drain Plug
Oil Filter
Drain Plug
— 8 —
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Generac GN-190/220 Engine
CAUTION: Never run this equipment without the complete
air cleaner system installed on the engine. This could result
in premature wear to the engine.
3. To clean or replace the foam pre-filter:
A. Wash the pre-filter in soapy water.
B. Squeeze the pre-filter dry with a clean cloth. DO
NOT TWIST.
Use the following instructions to clean or replace the
air cleaner components.
NOTE: If the pre-filter is still dirty after washing and drying it,
1. Loosen the two screws on the air cleaner cover. Remove the
air cleaner cover (Figure 7).
replace it with a new one.
C. Apply enough clean engine oil to saturate the pre-
filter.
Figure 7 — Removing the Air Cleaner Cover
D. Wrap the pre-filter in a clean dry cloth and squeeze
out the excess oil. DO NOT TWIST. Set the pre-filter
aside.
Foam
Pre-Filter may
stick to cover
4. To clean or replace the paper air filter:
C
HOK
E
A. Clean the air filter by tapping it gently on a solid
surface.
NOTE: If the filter is too dirty, replace it with a new one.
Dispose of the old filter properly.
5. Clean the air cleaner cover.
6. Insert the pre-filter into the cover, then the paper air
filter (see Figure 8).
2. Remove the paper air filter and the foam pre-filter from the
air cleaner cover (Figure 8).
7. Reinstall the air cleaner cover and tighten the two (2)
screws (see Figure 7).
Figure 8 — Air Cleaner Components
REPLACING THE SPARK PLUG
Foam
Use a Champion RC12YC spark plug or equivalent. The
correct air gap is 0.76mm (0.030 in.). Remove the plug every
100 hours of operation or once each year, whichever comes
first. This will help your engine to start easier and run better.
Pre-Filter
CHOKE
1. Stop the engine and pull the spark plug wire off of the
spark plug.
2. Clean around the spark plug and remove it from the
cylinder head.
Paper
Filter
— 9 —
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Generac GN-190/220 Engine
3. Set the spark plug gap (Figure 8) to 0.76mm (0.030 in.).
Install a correctly gapped spark plug into the cylinder head.
Figure 9 — Removing Heat Shield
Figure 8 — Setting Spark Plug Gap
SET PLUG GAP AT 0.76 mm
(0.030 inch)
Spark
Arrestor
Screen
83083
CLEANING THE SPARK ARRESTOR
SCREEN
The engine exhaust muffler has a spark arrestor screen. Inspect
and clean the screen every 100 hours of operation or once
each year, whichever comes first.
Heat Shield
SERVICE AND ADJUSTMENTS
ENGINE SPEED
NOTE: If you use your engine on any forest-covered, brush-
covered or grass-covered unimproved land, it must
have a spark arrestor. The spark arrestor must be
maintained in good condition by the owner/operator.
Clean and inspect the spark arrestor screen as follows:
Inspect the screen and replace if it is torn, perforated or otherwise
damaged (see Steps 1-4 below). DO NOT USE a defective screen. If
the screen is not damaged, clean it with a commercial solvent.
CAUTION: The engine speed was properly adjusted at
the factory and should require no additional adjustment.
Do not attempt to change engine speed. If you believe the
engine is running too fast or too slow, take your engine to
an authorized service center for repair and adjustment.
CHANGING THE ENGINE GOVERNED SPEED WILL
VOID THE ENGINE WARRANTY.
If the spark arrestor is found to be damaged or defective, replace it
as follows:
1. Remove the four (4) screws that connect the heat shield to
the muffler (Figure 9).
Your engine runs at a constant speed. This constant operating
speed is maintained by a mechanical, flyweight type, fixed
speed governor. DO NOT try to adjust the governed speed
setting for the following reasons:
2. Remove the four (4) screws that attach the spark arrestor
screen (Figure 9).
3. Replace damaged screen with new screen (Part No. 83083).
4. Reattach the screen and the heat shield with the four (4)
screws. Resintall the heat shield to the muffler with the four
(4) screws.
• Operating the engine at high engine speeds is dangerous and
increases the risk of personal injury or damage to the
equipment.
• Operating the engine at low engine speeds with heavy loads may
shorten the engine’s life.
— 10 —
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Generac GN-190/220 Engine
3. Loosen the rocker arm jam nut. Using an allen wrench to turn
the pivot ball stud, check the clearance between the rocker
arm and the valve stem with a flat feeler gauge (Figure 11).
CARBURETOR ADJUSTMENTS
The carburetor of your engine is pre-set at the factory. The
carburetor should not be tampered with because this will VOID
THE EMISSION CONTROL SYSTEM WARRANTY. If you
experience problems and your engine is used at an altitude in
excess of 5000 feet, contact the nearest authorized dealer
regarding high altitude setting changes.
Figure 11 — Adjusting Valve to Rocker Arm Clearance
Feeler Gauge
CHECKING/ ADJUSTING VALVE TO
ROCKER ARM CLEARANCE
Tighten Jam Nut to
65-85 inch-pounds
Allen Wrench
Every 50 hours of operation, remove the rocker cover and
check the valve to rocker arm clearance.
When adjusting the clearance, the engine should be at room
temperature, and the piston should be at Top Dead Center
(TDC) of its compression stroke (both valves are closed). The
correct clearance is 0.05-0.1mm (0.002-0.004 in.). Check and
adjust the valve to rocker arm clearance as follows:
Loosen Jam Nut,
1. Remove the four (4) screws from the rocker cover
(Figure 10).
4. When the valve clearance is correct, hold the pivot ball stud
with the allen wrench and tighten the rocker arm jam nut.
Torque the jam nut to 7.15-9.35 N-m (65-85 in-lb). After
tightening the jam nut, recheck the valve clearance to make
sure it did not change (see Figure 11).
2. Remove the rocker cover and rocker cover gasket.
Figure 10 —Removing the Valve Cover
5. Reinstall the rocker cover gasket, rocker cover and
the four (4) screws (see Figure 10).
LOW
OI
OHVI
— 11 —
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Generac GN-190/220 Engine
RETORQUING THE HEAD BOLTS
Figure 12 — Tightening Sequence
After the first 50 hours of operation, retorque the head bolts.
D
NOTE: Only perform this adjustment after the first 50 hours of
B
operation. The head bolts will need no further adjustment.
1. Remove the four (4) screws from the rocker cover
(see Figure 10).
2. Remove the rocker cover and rocker cover gasket.
3. Torque the bolts to 4.0 kg-m. (22 ft-lb).
E
A
4. Torque the bolts in the following sequence: A, B, C, D, E
(star pattern). See Figure 12.
C
MAINTENANCE SCHEDULE
Every 8 Hours or
25 Hours or Every
50 Hours or Every
Season
100 Hours or Every
Season
MAINTENANCE OPERATION
Check Oil Level
or Daily
X
Season
Change Oil
Change Oil Filter (if so equipped)
Service Air Filter
See Note 1
See Note 1
Paper Filter (Note 2)
Foam Pre-Filter
Replace or Clean Spark Plug
Clean Spark Arrestor Screen
Adjust Valve Clearance
Retorque Head Bolts
X
X
X
See Note 3
NOTE 1: Change oil and filter after first 8 hours of operation and then every 50 hours thereafter. Change sooner when operating under heavy load or in
dusty or dirty environment or in high ambient temperature.
NOTE 2: Clean more often when operating under dirty or dusty conditions.
NOTE 3: Perform this task ONLY after first 50 hours of operation. Head bolts will NOT need further retorquing.
— 12 —
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Generac GN-190/220 Engine
OTHER STORAGE TIPS
1. Do not store gasoline from one season to another.
STORAGE INSTRUCTIONS
This engine should be started at least once a week and run for at
least 30 minutes. If this cannot be done and the equipment must
be stored for more than 30 days, use the following guidelines to
prepare it for storage.
2. Replace the gasoline can if it starts to rust. Rust and/or dirt
in a gasoline can cause problems when you use that fuel
with this equipment.
3. Store the equipment in a clean and dry area.
WARNING: Never store the engine with the fuel in the tank
indoors or in an enclosed, poorly ventilated areas, where
fumes can reach an open flame spark or pilot light as on a
furnace, water heater, or clothes dryer.
SPECIFICATIONS
Model
GN-190
GN-220
1. Run the engine for about five (5) minutes to warm it.
Bore
70mm
75mm
Stroke
49mm
49mm
NOTE: Alcohol-blended fuel, or “gasohol”, attracts moisture which
can lead to the separation and formation of acids during
storage. This acidic gas can damage internal engine parts.
Methanol, ethanol and grain alcohol all are forms of
gasohol. If you did use “gasohol,” drain the fuel tank, then
run the engine until it stops from lack of fuel.
Valve Clearance
Displacement
0.05–0.10mm
190cc
0.05–0.10mm
220cc
Maximum Tilt Angle
While Operating
15°
15°
Oil Capacity with Oil Filter
770ml (29 oz.)
620ml (21 oz.)
770ml (29 oz.)
620ml (21 oz.)
Oil Capacity without Oil Filter
WARNING: Drain the fuel into approved container
outdoors, away from open flame. Be sure the engine is cool.
NOTE: Using a fuel additive such as STA-BIL® fuel stabilizer, or an
equivalent, will prevent gum deposits from forming in the
engine’s fuel system.
2. While the engine is still warm, drain the oil from the
crankcase. Refill with it with fresh oil. See BEFORE
STARTING ENGINE on Page 6 for oil recommendations.
3. Remove spark plug and pour about 1/2 ounce (15ml) of
engine oil into the cylinder. Crank slowly to distribute oil.
CAUTION: Avoid spray from the spark plug hole when
cranking the engine slowly.
4. Install the spark plug. Do not connect the spark plug wire.
5. Clean the dirt, oil and grease from the cylinder, cylinder head,
fins, blower housing, rotating screen and muffler area.
6. Close the fuel shut-off valve.
— 13 —
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Generac GN-190/220 Engine
EXPLODED VIEW — SHORT BLOCK
— 14 —
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Generac GN-190/220 Engine
SHORT BLOCK
ITEM
DESCRIPTION
PART NO.
QTY.
ITEM
28
29
30
31
32
33
34
36
37
38
39
40
41
42
43
44
45
46
47
48
49
DESCRIPTION
M8-1.25 x 35mm Screw
Spring Washer
PART NO.
89230
99922
A1720
88401
84186
83192
86254
21705B
90082
90081
88396A
83235
80336
96362
77161
77160
76307
88403
72657
88412
76329
QTY.
6
N/A
Long Block Assembly
(190cc used with Item 8A)
Long Block Assembly
(190cc used with Item 8B)
Long Block Assembly
(220cc used with Item 8A)
Long Block Assembly
(220cc used with Item 8B)
Control Rod Assembly
Piston Pin
21942E
1
1
21943E
21944E
21945E
1
1
1
Valve Spring Retainer
Valve Spring
2
2
Valve Spring Wear Washer
Geroter Set
2
1
“O” Ring
1
Cylinder Head Assembly
Exhaust Valve
1
1
2
78621
76389
78660
88411
A8897A
77168
90325
88057
76390
83337A
83338A
78658
78659
89213K
89213J
A7637
81695
A8929
78645
A7811
72683
98752
89096
88156
A8822
78691
A5772
A5776
74908
78606
76361
1
1
1
1
1
5
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
Intake Valve
1
3A
3B
4
Piston Ring Set [190cc
]
Push Rod
2
Piston Ring Set [220cc]
Gear Cover Assembly
M8 x 52mm Head Bolt
Piston [190cc]
Tappet
2
Oil Pick-up Assembly
Rocker Cover Gasket
Pivot Ball Stud
1
5
1
6A
6B
7
2
Piston [220cc]
GN-190/220 Rocker Arm
Rocker Arm Jam Nut
Push Rod Guide Plate
1/4” NPT Pipe Plug
Rocker Cover Assembly
Plastic Oil Fill Plug
2
Pin Retainer Ring
2
8A
8B
9
Tapered Crankshaft Assm.
Straight Crankshaft Assm.
Governor “R” Pin
1
2
1
10
11A
11B
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Gov. Arm Thrust Washer
Crankcase Assm. [190cc]
Crankcase Assm. [220cc]
Governor Arm
1
Oil Seal
Governor Gear Assembly
Governor Gear C-Ring
Governor Spool
1/8” NPT Pipe Plug
Camshaft Assembly
Crankcase Gasket
Valve Stem Seal
Cylinder Head Gasket
Oil Pressure Relief Cover
Oil Pressure Spring
11/32” Ball
M5 Form Screw
M6-1.0 x 12mm Screw
Gov. Gear Thrust Washer
— 15 —
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Generac GN-190/220 Engine
EXPLODED VIEW — AIR CLEANER AND CARBURETOR
ITEM
DESCRIPTION
PART NO.
QTY.
31
32
33
34
35
36A
37
38
Breather Hose
90947
1
1
1
1
2
1
2
2
1
Manifold Head Gasket 90051
M6 x 55mm Capscrew 57058
M6 x 25mm Capscrew 80318
M6 x 30mm Screw
Intake Manifold
M6 Lock Washer
M6 Hex Nut
80316
20136
22097
49813
21202
39A
Carburetor/Air Box
Gasket
40
41
42
#10-32 x 3/4” Screw
Canal Cover
Carburetor/Manifold 21201
Gasket
36935
80303
2
1
1
43A
44A
45
Dellorto Carburetor
Air Cleaner Base
M6 x 12mm Capscrew 66476
#8 x 3/8" Plastite
Screw
21203
21200
1
1
1
1
46
59635
47
48
Air Filter
Precleaner
78601
78602
1
1
— 16 —
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Generac GN-190/220 Engine
AIR CLEANER AND CARBURETOR
ITEM
DESCRIPTION
PART NO.
QTY.
31
32
Breather Hose
Manifold Head
Gasket
90947
90051
1
1
35
36B
39B
M6 x 30mm Screw
Intake Manifold
Carburetor /Air Box
Gasket
80316
90948
91846
2
1
1
41
42
Canal Cover
Carburetor Manifold 78631
Gasket
80303
1
1
43B
43C
44B
45
Carburetor (190cc)
Carburetor (220cc)
Air Cleaner Base
M6 x 12mm Capscrew 66476
#8 x 3/8" Plastite
Screw
98469
97747
78607
1
1
1
1
1
46
59635
47
48
49
50
Air Filter
78601
78602
83504
78643
1
1
1
2
Precleaner
Choke Knob
Curb Bolt
— 17 —
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Generac GN-190/220 Engine
EXPLODED VIEW — GAS TANK
ITEM PART #
QTY.
2
DESCRIPTION
M6 X 15 Taptite
Tank Bracket
M6 Flange Nut
Tank Cradle
55
57
58
59
60
83512
95213
77395
95214
30340
1
2
1
12”
1
1/4” ID Hose
Hose Clamp
61 48031C
— 18 —
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Generac GN-190/220 Engine
EXPLODED VIEW — OIL FILTER AND OPTIONAL OIL FILL TUBE
ITEM PART #
QTY.
DESCRIPTION
Expansion Plug
Oil Filter Gasket
Oil Blockoff
ITEM PART #
QTY.
2
DESCRIPTION
M5 X 12 Taptite
Dipstick ASM
M6 X 12 Taptite
M6 Flat Washer
M6 X 16 HHCS
Rubber Washer
Fill Tube
1
2
94820
91848
88758
84982
92978
99236
70185
1
1
1
1
2
1
1
64
65
66
67
68
69
70
71
72
74908
91475
90388
22473
47411
91230
91041
95997
77395
1
3A
3B
4
1
Oil Filter Adapter
M6 X 18 Taptite
Oil Press Switch
Oil Filter
1
1
5
1
6
1
1
Oil Fill Brkt
1
M6 Flange Nut
— 19 —
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Generac GN-190/220 Engine
EXPLODED VIEW — LOW OIL SHUTDOWN AND GOVERNOR
ITEM PART #
QTY.
DESCRIPTION
7
8
78653
85272
86753
84195
85620
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
Run/Stop Switch
LED Assembly
ITEM PART #
QTY.
1
DESCRIPTION
21
22
23
24
86962
85953
83502
83512
Governor Lever
Wear Washer
8A
9
LED Assembly
1
L.O.S. Decal
1
Adjust Screw
10
Black Sleeving
Black Wire Assembly
3 Pin Male HSG
White Wire Assembly
M6 Lockwasher
M6 X 30 Taptite
Ignition Coil
1
M8 X 15 Taptite
60Hz Gov. Spring
50Hz Gov. Spring
M6 X 12 HHCS
M5 Lock Nut
11 00285271
12 84329
13 00185271
25A 78604
25B 86643
1
1
26
27
28
29
30
66476
83503
83781
86384
86037
1
14
15
16
17
22097
82981
81675
84274
1
1
Governor Brkt.
Governor Rod
Anti-Lash Spring
Idle Coil ASM
1
Tinnerman Clamp
L.O.S. Module
M6 x 10mm Screw
Sparkplug
1
18 87221A
100 83782
101 66311
1
19
20
45756
72347
1
M8 — 1.25 Jam Nut
— 20 —
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Generac GN-190/220 Engine
EXPLODED VIEW — STEPPER MOTOR, FLYWHEEL, RECOIL STARTER
ITEM PART #
85 78608A
86 90695A
QTY.
1
DESCRIPTION
Air Box Cover
Blower Housing
Lower Wrapper
M6 X 12 HHCS
Recoil Assembly
Recoil Cup
1
87
88
89
90
89739
66476
A2799
A2842
1
9
1
1
ITEM
55
PART #
83512
82774
QTY.
2
DESCRIPTION
M8 X 15 Taptite
Woodruff Key
191 Flywheel
220 Flywheel
Conical Washer
M16 Hex Nut
Top Wrapper
M6 X 10 Taptite
Cover Bolts
91 78651C
1
Backplate
92
93
94
95
96
97
98
99
59636
86296
88905
89477
89478
40976
90192
92059
1
#4 X 3.37 Long
Governor Rod
Extension Spring
Spring Clip
78
1
1
79A SRV77182T
79B SRV77182E
1
1
1
1
80
81
82
83
84
83312
81810
92984
45756
78609
1
1
Snap Button
1
1
SHCS M8—1.25 X 20
Carb Wear Washer
Stepper Motor
1
1
4
1
2
— 21 —
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Generac GN-190/220 Engine
CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The California Air Resources Board ("CARB") and Generac Corporation are pleased to explain the Emission Control System
Warranty on your new utility or lawn and garden equipment engine. In California, new utility and lawn and garden
equipment engines must be designed, built and equipped to meet the State's stringent anti-smog standards. Generac
Corporation will warrant the emission control system on your utility or lawn and garden equipment for the periods of time
listed below provided there has been no abuse, neglect, unapproved modification, or improper maintenance of your utility or
lawn and garden equipment engine.
Your emission control system may include parts such as the carburetor, ignition system and exhaust system. Also included may
be the compression release system and other emission-related assemblies.
Where a warrantable condition exists, Generac Corporation will repair your utility or lawn and garden equipment engine at
no cost to you for diagnosis, parts and labor.
MANUFACTURER'S EMISSION CONTROL SYSTEM WARRANTY COVERAGE:
Emissions control systems on 1995 and later model year utility and lawn and garden equipment engines are warranted for two
years as hereinafter noted. If, during such warranty period, any emission-related part on your engine is defective in materials
or workmanship, the part will be repaired or replaced by Generac Corporation.
OWNER'S WARRANTY RESPONSIBILITIES:
As the utility or lawn and garden equipment engine owner, you are responsible for the performance of the required
maintenance listed in your owners manual. Generac Corporation recommends that you retain all receipts covering
maintenance on your utility or lawn and garden equipment engine, but Generac Corporation will not deny warranty solely
due to the lack of receipts or for your failure to provide written evidence of the performance of all scheduled maintenance.
As the utility or lawn and garden equipment engine owner, you should, however, be aware that Generac Corporation may
deny you warranty coverage if your utility or lawn and garden equipment engine or a part thereof has failed due to abuse,
neglect , improper maintenance or unapproved modifications.
You are responsible for presenting your utility or lawn and garden equipment engine to a Generac Corporation Authorized
Service Outlet as soon as a problem exists. The warranty repairs should be completed in a reasonable amount of time, not to
exceed 30 days.
Warranty service can be arranged by contacting either a Generac Corporation Authorized Service Outlet or by contacting
Generac Corporation at:
GENERAC CORPORATION PH: (414) 544-4811
P.O. BOX 8 FAX: (414) 544-0179
WAUKESHA, WI 53187
IMPORTANT NOTE: This warranty statement explains your rights and obligations under the Emission Control System
Warranty ("ECS Warranty") which is provided to you by Generac Corporation pursuant to California law. See also the Generac
Corporation Limited Warranties for Generac Corporation which is enclosed herewith on a separate sheet and also is provided
to you by Generac Corporation. The ECS Warranty applies only to the emission control system of your new engine. To the
extent that there is any conflict in terms between the ECS Warranty and the Generac Corporation Warranty, the ECS Warranty
shall apply except in any circumstances in which the Generac Corporation Warranty may provide a longer warranty period.
Both the ECS Warranty and the Generac Corporation Warranty describe important rights and obligations with respect to your
new engine.
Warranty service can only be performed by a Generac Corporation Authorized Service Outlet. At the time of requesting
warranty service, evidence must be presented of the date of the sale to the original purchaser. The purchaser shall pay any
charges for making service calls and/or for transporting the products to and from the place where the inspection and/or
warranty work is performed. The purchaser shall be responsible for any damage or loss incurred in connection with the
transportation of any engine or any part(s) thereof submitted for inspection and/or warranty work.
IF YOU HAVE ANY QUESTIONS REGARDING YOUR WARRANTY RIGHTS AND RESPONSIBILITIES, YOU SHOULD CONTACT
GENERAC CORPORATION AT 1-800-222-3136.
— 22 —
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Generac GN-190/220 Engine
EMISSION CONTROL SYSTEM WARRANTY
Emission Control System Warranty ("ECS Warranty") for 1995 and Later Model Year Utility and Lawn and Garden Equipment Engines:
A. Applicability: This warranty shall apply to 1995 and later model year utility and lawn and garden equipment engines. The ECS Warranty
Period ("ECS Warranty Period") shall begin on the date the new engine or equipment is delivered to its original, end-use purchaser and shall
begin on the date the new engine or equipment is delivered to its original, end-use purchaser and shall continue for 24 consecutive months
thereafter.
B. General Emissions Warranty Coverage: Generac Corporation warrants to the original, end-use purchaser of the new engine or equipment
and to each subsequent purchaser that each of its utility and lawn and garden equipment engines is:
1. Designed, built and equipped so as to conform with all applicable regulations adopted by the Air Resources Board pursuant to its
authority, and
2. Free from defects in materials and workmanship which, at any time during the ECS Warranty Period, will cause a warranted emissions -
related part to fail to be identical in all material respects to the part as described in the engine manufacturer's application for certification.
C. The ECS Warranty only pertains to emissions-related parts on your engine, as follows:
1. Any warranted, emissions-related parts which are not scheduled for replacement as required maintenance in the Owner's Manual shall be
warranted for the ECS Warranty Period. If any such part fails during the ECS Warranty Period, it shall be repaired or replaced by Generac
Corporation according to Subsection (4) below. Any such part repaired or replaced under the ECS Warranty shall be warranted for any
remainder of the ECS Warranty Period.
2. Any warranted, emissions-related part which is scheduled only for regular inspection as specified in the Owner's Manual shall be
warranted for the ECS Warranty Period. A statement in such written instructions to the effect of "repair or replace as necessary" shall not
reduce the ECS Warranty Period. Any such part repaired or replaced under the ECS Warranty shall be warranted for any remainder of the
ECS Warranty Period.
3. Any warranted, emissions-related part which is scheduled for replacement as required maintenance in the Owner's Manual shall be
warranted for the period of time prior to first scheduled replacement point for that part. If the part fails prior to the first scheduled
replacement, the part shall be repaired or replaced by Generac Corporation according to Subsection (4) below. Any such emissions-related
part repaired or replaced under the ECS Warranty shall be warranted for the remainder of the ECS Warranty Period prior to the first
scheduled replacement point for such emissions-related part.
4. Repair or Replacement of any warranted, emissions-related part under this ECS Warranty shall be performed at no charge to the owner
at a Generac Corporation Authorized Service Outlet.
5. The owner shall not be charged for diagnostic labor which leads to the determination that a part covered by the ECS Warranty is in fact
defective, provided that such diagnostic work is performed at a Generac Corporation Authorized Service Outlet.
6. Generac Corporation shall be liable for damages to other original engine components or approved modifications proximately caused by
a failure under warranty of any emission-related part covered by the ECS Warranty.
7. Throughout the ECS Warranty Period, Generac shall maintain a supply of warranted emission-related parts sufficient to meet the expected
demand for such emission-related parts.
8. Any Generac Corporation authorized and approved emission-related replacement part may be used in the performance of any ECS
warranty maintenance or repairs and will be provided without charge to the owner. Such use shall not reduce Generac Corporation ECS
warranty obligations.
9. Unapproved add-on modified parts may not be used to modify or repair a Generac Corporation engine. Such use voids this ECS Warranty
and shall be sufficient grounds for disallowing an ECS Warranty claim. Generac Corporation shall not be liable hereunder for failures of
any warranted parts of a Generac Corporation engine caused by the use of such an unapproved add-on or modified part.
EMISSION RELATED PARTS INCLUDE THE FOLLOWING:
1. Carburetor assembly and it's internal components.
a. Fuel filter
3. Ignition system including:
a. Spark plug
b. Carburetor gaskets
c. Intake pipe
b. Ignition module
4. Catalytic muffler (if so equipped)
a. Muffler gasket (if so equipped)
b. Exhaust manifold (if so equipped)
2. Air cleaner assembly
a. Air filter element
5. Crankcase breather assembly and its components.
a. Breather connection tube
— 23 —
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Generac GN-190/220 Engine
GENERAC POWER SYSTEMS, INC.
TWO YEAR LIMITED WARRANTY FOR “GN” ENGINES
Generac Power Systems, Inc. warrants to the original purchaser that the engine will be trouble free from defects in material
or workmanship for the items and period set forth below from the date of original purchase. This warranty is not transferable.
This warranty pertains to “GN” engines utilized to power equipment within the lawn and garden industry. Examples are, but
not limited to generators, pressure washers, air compressors, welders, lawn tractors, snow blowers, mowers, edgers and
pumps.
ENGINE COVERAGE
CONSUMER*
COMMERCIAL*
1 YEAR
2 YEARS (2 YEAR PARTS ONLY)
With the exception of European Community Countries, all engines bound for export shall be warranted for one (1) year in
consumer applications, and 90 days in commercial applications as defined below.
NOTE: For the purpose of this warranty, “consumer use” means personal residential household use by original purchaser. This
does not apply to engines used in generators used for prime power in place of utility. “Commercial use” means all other uses,
including rental, construction and income producing purposes. Once an engine has experienced commercial use, it shall
thereafter be considered a commercial use for the purpose of this warranty.
DURING SAID WARRANTY PERIOD, GENERAC POWER SYSTEMS, INC. WILL, AT ITS OPTION, REPAIR OR REPLACE ANY PART
WHICH, UPON EXAMINATION BY GENERAC POWER SYSTEMS, INC. IS FOUND TO BE DEFECTIVE UNDER NORMAL USE AND
SERVICE. Starting batteries are not warranted by Generac Power Systems, Inc. All transportation costs under warranty,
including return to the factory if necessary, are borne by the purchaser and paid by him. This warranty does not include normal
maintenance and service and does not apply to engines or parts which have been subjected to improper or unauthorized
installation, misuse, negligence, accident, overloading, over speeding, improper maintenance, improper repair or improper
storage so as, in Generac Power Systems, Inc.’s judgement, to adversely affect its performance and reliability.
NORMAL WEAR: As with all mechanical devices, the “GN” Series engines requires periodic service and parts replacement
(example: oil filter) in accordance with the owner’s manual schedules maintenance to insure proper performance of the
engine. This warranty will not cover repair when normal use has exhausted the life of a part or engine.
There is no other expressed warranty. GENERAC POWER SYSTEMS, INC. HEREBY DISCLAIMS ANY AND ALL IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
TO THE EXTENT PERMITTED BY LAW. The duration of any implied warranties which cannot be disclaimed is limited to the time
period (one year) as specified in the expressed warranty. Liability for consequential, incidental, or special damages under any
and all warranties is excluded to the extent permitted by law. Some states do not allow limitations on how long an implied
warranty lasts, or the exclusions or limitations of consequential or incidental damages, so the limitations or exclusions do not
apply. This warranty provides the original purchaser specific legal rights and the original purchaser may also have other rights,
which vary state to state.
For service, please see your nearest Generac Power Systems, Inc. Authorized Service Dealer or call 414-544-4811. Warranty
service can only be performed by a Generac Power Systems, Inc. Authorized Service Dealer. This warranty does not apply to
service performed at any other facility or dealership. At the time of requesting warranty service, evidence of the original
purchase date must be presented.
GENERAC CORPORATION
P.O. BOX 8
WAUKESHA, WI 53187
TELEPHONE: (414) 544-4811
FAX: (414) 544-4851
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