Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Engines›Generac Generac OHV

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

45
TypeItemValueUnitCondition
OtherProduct Dimensions14.5 x 11.5 x 3.5in (368 x 292 x 89 mm)
OtherProduct Dimensions18 x 18 x 4in (457 x 457 x 102 mm)
OtherProduct Dimensions9 x 6 x 5in (229 x 152 x 127 mm)
OtherProduct Weight23lbs (10.5 kg)
OtherProduct Weight24lbs (11 kg)
OtherProduct Weight26lbs (11.75 kg)
OtherProduct Weight5lbs (2.25 kg)
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

7
Part #DescriptionCategory
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
0C7108Scheduled maintenance kitService part / kit
0E1130Scheduled maintenance kitService part / kit
0E1744Scheduled maintenance kitService part / kit
0H0839Scheduled maintenance kitService part / kit

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.