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Generac Generac OHV Engine

The Generac Generac OHV is a 0.43 L 1-cylinder engine rated at 3600 rpm. It powers generator sets from Generac, including the LP3250. It holds 1 L (0.3 gal) of oil.

Also known as: Generac Generac OHV

Part of the Generac Generac engine family — 2 variants share parts & fitment.

0.432 L
Displacement
1
Cylinders
3600 rpm
Rated speed
1.0 L
Oil capacity
On this pageSpecsGenerator setsFAQTorque & specsFault codesProcedures

Engine specifications

Oil capacity1.0 L
Displacement0.432 L
Cylinders1
Rated speed3600 rpm

Service specifications

38
TypeItemValueUnitCondition
ResistanceExciter Windings - GP1800 (alt 0H8255/0J0819)2.53Ohms
ResistanceExciter Windings - GP3250 (alt 0H2626/0H3578)1.72Ohms
ResistanceExciter Windings - GP5500/GP/LP5500 (alt 0G9769/0J8363)2.81Ohms
ResistanceExciter Windings - GP6500E (alt 0H9920/0K1291)2.9 ± 10%Ohms
ResistanceExciter Windings - GP7500E DF-CO (alt A0001920613/A0000121536)1.928Ohms
ResistanceExciter Windings - GP8000E COSTCO (alt 0J8438/0K9791)1.626Ohms
ResistanceExciter Windings - LP3250 (alt 0J2561/0J6032)2Ohms
ResistancePower Windings - GP1800 (alt 0H8255/0J0819)0.798Ohms
ResistancePower Windings - GP3250 (alt 0H2626/0H3578)0.62Ohms
ResistancePower Windings - GP5500/GP/LP5500 (alt 0G9769/0J8363)0.681Ohms
ResistancePower Windings - GP6500E (alt 0H9920/0K1291)0.6 ± 10%Ohms
ResistancePower Windings - GP7500E (alt 0J1927/0K8981)1.62Ohms
ResistancePower Windings - GP7500E DF-CO (alt A0001920613/A0000121536)0.491Ohms
ResistancePower Windings - GP8000E COSTCO (alt 0J8438/0K9791)0.471Ohms
ResistancePower Windings - LP3250 (alt 0J2561/0J6032)0.63Ohms
ResistanceRotor Windings - GP1800 (alt 0H8255/0J0819)29.4Ohms
ResistanceRotor Windings - GP3250 (alt 0H2626/0H3578)31Ohms
ResistanceRotor Windings - GP5500/GP/LP5500 (alt 0G9769/0J8363)61.48Ohms
ResistanceRotor Windings - GP6500E (alt 0H9920/0K1291)69 ± 10%Ohms
ResistanceRotor Windings - GP7500E (alt 0J1927/0K8981)58.8Ohms
ResistanceRotor Windings - GP7500E DF-CO (alt A0001920613/A0000121536)52.42Ohms
ResistanceRotor Windings - GP8000E COSTCO (alt 0J8438/0K9791)52.17Ohms
ResistanceRotor Windings - LP3250 (alt 0J2561/0J6032)58Ohms
SpeedNo-load AC frequency62.0-62.5hertzrunning adjustment, no-load
TorqueGovernor Lever Clamp Bolt110in-lbs (12.4 Nm)
TorqueGovernor Lever Clamp Bolt70in-lbs (8 Nm)
TorqueRocker Arm Jam Nut14ft-lbs (19 Nm)
TorqueRocker Arm Jam Nut6-9ft-lbs (8-12 Nm)
TorqueRocker Arm Jam Nut7ft-lbs (9.4 Nm)
TorqueRocker Arm Jam Nut9-12ft-lbs (12-16 Nm)
Valve clearanceExhaust Valve Clearance0.004-0.006in (0.01-0.015 mm)
Valve clearanceExhaust Valve Clearance0.0059in (0.015 mm)
Valve clearanceExhaust Valve Clearance0.006 ± 0.001in (0.15 ± 0.02 mm)
Valve clearanceIntake Valve Clearance0.002-0.004in (0.005-0.01 mm)
Valve clearanceIntake Valve Clearance0.0039in (0.01 mm)
Valve clearanceIntake Valve Clearance0.004 ± 0.001in (0.1 ± 0.02 mm)
Valve clearanceValve Clearance0.003-0.005in (0.0076-0.0127 mm)
Valve clearanceValve Clearance0.005-0.007in (0.013-0.017 mm)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Fault codes

1
CodeNameMeaningSeverityAction
Red Short FlashCO Module - Red Short FlashElevated level of CO in the area; module is functioning properly and protecting operatorsShutdownGenerator shuts down; module is functioning as intended

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

3
Test 20 - Check Spark Plugs / Test 23 - Check Valve Adjustment adjustment

Tools: feeler gauge, crow foot wrench

  1. Adjust valve clearance with engine at room temperature
  2. Position piston at TDC of compression stroke (both valves closed), or set intake/exhaust valve fully open method
  3. Loosen rocker arm jam nut; turn pivot ball stud while checking clearance with a feeler gauge
  4. When clearance is correct, hold pivot ball stud and tighten rocker arm jam nut to specified torque with a crow foot wrench
  5. Recheck valve clearance to make sure it did not change
  6. Install rocker arm cover with a new gasket
Test 27 - Check / Adjust Governor adjustment

Tools: AC frequency meter

  1. Loosen governor clamp bolt
  2. Hold governor lever at wide open throttle position
  3. Rotate governor shaft counterclockwise (389/208/196cc) or clockwise (410cc) as far as it will go
  4. Tighten governor lever clamp bolt to 110 in-lbs (389/208/196cc) or 70 in-lbs (410cc)
  5. Turn speed adjustment screw counterclockwise three full turns to avoid overspeed
  6. Start engine and let warm up under no-load
  7. Connect AC frequency meter; no-load frequency should be 62.0-62.5 hertz
  8. Turn speed adjust screw until frequency/RPM is within limits
  9. Apply removable Loctite (Loctite 241) to speed adjust screw threads
Test 41 - CO Module Verification Test diagnostic

⚠ Do NOT insert the drill bit into the LED holes; damage to the LEDs will occur

Tools: 3/64 inch drill bit

  1. Do not install CO badging (decal) prior to performing this test
  2. Run generator under normal operation with no CO module notifications for a minimum of 65 seconds
  3. With generator running, insert blunt end of a 3/64 inch drill bit into test switch hole
  4. Hold the drill bit against the mounting panel until notification LEDs appear and generator shuts off
  5. Successful pin test shows both LEDs on solid (not blinking)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Parts cataloged across the Generac Generac family

57
Part #DescriptionCategory
0D3262AIR FILTER ELEMENTair_filter
0D4511PRECLEANER, AIRair_filter
0D9723ELEMENT AIR FILTERair_filter
0830490REGULATOR VOLTAGEavr
066386BRUSH HOLDERbrush
087769FUEL FILTERfuel_filter
0D7515FUEL FILTERfuel_filter
078631GASKET CARBURETOR/MANIFOLDgasket
089096CRANKCASE GASKETgasket
089476GASKET, EXHAUSTgasket
090051GASKET, MANIFOLD/HEADgasket
091846GASKET, CARB/ADAPTORgasket
091848GASKET, OIL PSI PADgasket
0A8822CYLINDER HEAD GASKETgasket
0C8754ROCKER COVER GASKETgasket
0D8372GASKET, CARB TO AIRBOXgasket
0D8981FILTER GASKET RVgasket
0E0017GASKET, MUFFLER TAIL PIPE BOXgasket
0D7666BREATHER TUBEhose
0E0683ATailpipe: 16 in run, 1-1/4 in diameterhose
0E0907RV Twin Exhaust Pipe: 26 in run, 1-1/2 in diameterhose
0G5857Tailpipe: 25 in run, 1-1/4 in diameterhose
070185Oil Filteroil_filter
023484SBUSHING, 1.09" SNAPother_service
053623CIRCUIT BREAKERother_service
065795BATTERY CHARGER RECTIFIERother_service
073159BEARINGother_service
081675ASSEMBLY, IGNITION COILother_service
088057PISTONother_service
088396APUSH RODother_service
088401VALVE SPRINGother_service
088411PISTON RING SETother_service
089680SPARK ARRESTERother_service
090145CIRCUIT BREAKER 30 X 1other_service
0922340CONTROLLER P.C.B.other_service
0A9611FUSE 7.5 AMPother_service
0C3590EXHAUST VALVEother_service
0C3591INTAKE VALVEother_service
0C3592VALVE SPRING KEEPERother_service
0C7108Scheduled maintenance kitother_service
0D7440MUFFLERother_service
0D8332CARBURETORother_service
0D8590ASSEMBLY, BI-METAL/HEATERother_service
0D8591SOLENOID, CHOKEother_service
0E1130Scheduled maintenance kitother_service
0E1744Scheduled maintenance kitother_service
0H0839Scheduled maintenance kitother_service
080336OIL PICK-UP ASSEMBLYpump
0D7513PUMP, FUELpump
081695OIL SEALseal
086254"O" RINGseal
088156SPARK PLUGseal
094090SWITCH, THERMAL 293Fsensor
0A8584SWITCH OIL PRESSUREsensor
072347SPARK PLUGspark_plug
086729CONTACTOR, STARTERstarter
0C9706STARTER ASSEMBLYstarter

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Common questions

What is the oil capacity of the Generac Generac OHV?

The Generac Generac OHV engine has an oil capacity of 1.0 liters.

What is the displacement of the Generac Generac OHV?

The Generac Generac OHV has a displacement of 0.432 liters with 1 cylinders.

Which generators use the Generac Generac OHV engine?

The Generac Generac OHV powers 1 generator set(s), including Generac LP3250.