Home›Engines›Generac OHVI

Generac OHVI Engine

The Generac OHVI is a 0.53 L 1-cylinder naturally aspirated engine rated at 2600 rpm. It powers generator sets from Generac, including the EcoGen 005818-0, EcoGen 6 kW, GP15000 and GP17500. It holds 4 L (1.1 gal) of oil.

Also known as: Generac OHVI, OHVI

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

0.53 L

Displacement

Cylinders

2600 rpm

Rated speed

4.0 L

Oil capacity

On this pageSpecs Generator sets Maintenance FAQ Service intervals Torque & specs Fluids Fault codes Procedures Wiring

Engine specifications

Oil capacity	4.0 L
Displacement	0.53 L
Cylinders	1
Aspiration	naturally aspirated
Rated speed	2600 rpm

Generator sets powered by this engine

Generac EcoGen 005818-0 Generac EcoGen 6 kW Generac GP15000 Generac GP17500 Generac GP1800 Generac GP3250 Generac GP5000 Generac GP5500 Generac GP6500 Generac GP7000 Generac GP8000 Generac GUARDIAN 8 Generac Guardian 8kWGenerac Model 0162220SBY.pdfGenerac Model 0169160SBY.pdfGenerac Model 0172890SBY.pdfGenerac Model 0181650SBY.pdfGenerac Model 0186170SBY.pdfGenerac Model 0186180SBY.pdfGenerac Model 0189320SBY.pdfGenerac PP-50Generac ULTRA SOURCE 15000Generac XG10000 Generac XG4000 Generac XG5600 Generac XG6400 Generac XG6500 Generac XG7000 Generac XG8000 Generac XP10000 Generac XP4000 Generac XP6500 Generac XP6500E 5930Generac XP6500E 5934-0Generac XP8000 Generac iX 1600 Generac iX 2000 Generac iX 800Generac iX1400

How to read your Generac engine serial & model number →

Common problems

Poor compression
Cause: Loose cylinder head bolts
Engine turns over but will not start
Cause: Fuel shutoff valve OFF
Fix: Turn ON
Engine cranks but will not start
Cause: Fuel shutoff valve OFF
Fix: Turn ON
Engine Will Not Start
Cause: Low oil light on
Fix: Check oil level; replenish oil
Engine starts hard and runs rough (410cc)
Cause: Spark plug bad
Fix: Replace spark plug
Engine starts hard and runs rough
Cause: Spark plug bad
Fix: Replace spark plug
Generator produces zero voltage or residual voltage
Cause: Main circuit breaker tripped or bad
Fix: Reset to ON or replace if bad
Engine "hunts" / erratic idle (410cc)
Cause: Carburetion bad
Fix: Repair or replace
Engine "hunts" / erratic idle
Cause: Carburetion bad
Fix: Repair or replace
Generator produces zero voltage or residual voltage (brushed excitation)
Cause: Main circuit breaker tripped or bad
Fix: Reset to ON or replace if bad
Engine will not crank
Cause: Battery or cables bad
Fix: Recharge or replace battery; clean, repair or replace bad cable(s)
Engine starts then shuts down
Cause: Oil level low
Fix: Replenish oil
Engine Hunts / Erratic Idle or Will Not Come Up to Speed
Cause: Bad choke assembly
Fix: Replace choke assembly
Engine will not start; or starts and runs rough.
Cause: 1. Fuel shut-off is OFF. 2. Dirty air filter. 3. Out of gasoline. 4. Stale gasoline. 5. Spark plug wire not connected to spark plug. 6. Bad spark plug. 7. Water in gasoline. 8. Over-choking. 9. Low oil level. 10. Excessive rich fuel mixture. 11. Intake valve stuck open or closed. 12. Engine has lost compression.
Fix: 1. Turn Fuel shut-off ON. 2. Clean or replace air filter. 3. Fill fuel tank. 4. Drain fuel tank and fill with fresh fuel. 5. Connect wire to spark plug. 6. Replace spark plug. 7. Drain fuel tank; fill with fresh fuel. 8. Put choke knob to No Choke position. 9. Fill crankcase to proper level. 10. Contact Authorized Service Facility. 11. Contact Authorized Service Facility. 12. Contact Authorized Service Facility.
Voltage & frequency are both high or low
Cause: Engine governor out of adjustment (389cc engine)
Fix: Check & adjust engine governor, 389cc engine

Compiled from service & troubleshooting documentation across every generator set that uses the Generac OHVI.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter			—	200 hr
Fuel filter	In-line fuel filter		—
Oil filter	Spin on full flow vertically mounted		—
Oil	5W30	1.5 liter	0J00620106	100 hr	Amazon eBay $35.00 NAPA $2.82 FridayParts $32.07
Spark plug	Champion RC14YC; gap 0.030" (0.76mm)		0J00620106		Amazon eBay $35.00 NAPA $2.82 FridayParts $32.07

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service intervals

Item	Action	Hours	Months	Notes
Engine oil level	Check	8 hr		Prior to each use, or every 8 hours of operation
Oil and Oil Filter	Change	100 hr		First service — First 30 hours
Air Filter	Clean	100 hr		Clean more often if operating in dusty or sandy conditions
Engine oil	Change	200 hr	24 mo	First service — every 100 hours of run time thereafter
Spark Arrestor Screen	Clean	100 hr		Every Season/Every 100 Hours; clean more often under dirty/dusty conditions
Spark arrestor	Inspect	100 hr	12 mo	Every 100 hours or every year
Exercise	Test	168 hr		Weekly exercise
Air Filter	Other	200 hr		Service Air Filter - Every Season/Every 200 Hours
Air cleaner filter	Clean	200 hr	12 mo	Every 200 hours or every year; replace if cannot be adequately cleaned
Scheduled maintenance	Change	200 hr	24 mo	Oil, oil filter, spark plugs recommended for maintenance kits
Service Schedule A	Other	200 hr	24 mo	200 hours or 2 years
Valve clearance	Check	500 hr	12 mo	First service — Check/adjust after first 50 hours, then every 300 hours thereafter or every year
Service Schedule B	Other	400 hr	48 mo	400 hours or 4 years
Air cleaner	Change	500 hr	24 mo	2Y or 500 hours
Air cleaner	Replace	500 hr	24 mo
Complete tune-up	Other	500 hr	24 mo	To be completed by a dealer
Oil	Change	500 hr	24 mo	2Y or 500 hours, whichever occurs first
Oil and filter	Change	500 hr		Extended maintenance intervals due to advanced oil circulation system
Oil filter	Change	500 hr	24 mo	2Y or 500 hours
Spark plug(s)	Change	500 hr	24 mo	2Y or 500 hours
Spark plug(s)	Replace	500 hr	24 mo
Valve clearance	Adjust	500 hr	6 mo	First service — After first six months or 500 hours of operation
Alternator Rotor Brushes	Check	2500 hr
Alternator rotor brushes	Inspect	2500 hr
Battery charge state	Check		6 mo	Every 6 months
Battery electrolyte level	Check		6 mo	Every 6 months
Battery terminals	Clean		1 mo	Remove corrosion, ensure dryness, tighten
Battery terminals	Other		1 mo	Clean and tighten monthly
Battery: remove corrosion, ensure dryness	Clean		1 mo	Monthly
Fuel Filter	Replace		12 mo
Fuel lines and connections	Inspect		1 mo	Notify dealer if repair needed
General condition (vibration, noise, leakage, temperature)	Inspect		1 mo	Monthly
Generator	Test		1 mo	Monthly run/inspect per Generator - Inspect procedure
Muffler	Check		6 mo
Spark Plug	Check		6 mo
Spark plug	Replace		12 mo	Every year
Vibration, Noise, Leakage, Temperature	Inspect		1 mo	Monthly, notify dealer if needed

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

Service specifications

Type	Item	Value	Unit	Condition
Clearance	Flywheel magnet attraction distance (screwdriver test)	3/4 (19mm)	inch
Clearance	Valve clearance (rocker arm to valve stem)	0.002-0.004	inch (0.05-0.1 mm)	engine cool, 60-80°F
Gap	Spark Plug Gap	.030	in
Gap	Spark Plug Gap	0.030	inch (0.76 mm)
Gap	Spark Plug Gap (iX 1600)	.030	in
Gap	Spark Plug Gap (iX 2000)	.030	in
Gap	Spark plug gap	0.024-0.028	in
Gap	Spark plug gap	0.028-0.031	inch (0.70-0.80 mm)
Gap	Spark plug gap	0.03	in
Gap	Spark plug gap	0.508	mm
Gap	Spark plug gap	0.76	mm
Gap	Spark plug gap	1.02	mm
Gap	Spark plug gap (GP1800/GP3250/GP5000/GP5500/GP6500)	0.028"-0.031" (0.7-0.8mm)	inch
Gap	Spark plug gap (GP7000/GP8000)	0.030" (0.76mm)	inch
Gap	Trigger pickup gap	0.20-0.30	mm
Other	1.5 Amp fuse rating	1.5	Amp
Other	AC output load test - frequency should not drop below	59	Hertz	load applied
Other	Capacitor rating - Alternator Configuration A	47	µf (440 VAC)
Other	Capacitor rating - Alternator Configuration B	28	µf
Other	Capacitor test tolerance	± 5	µf
Other	Cylinder leak down - normally acceptable leakage	20	percent
Other	Fuel pressure alternative units	19-22	mm mercury	all load ranges
Other	LP fuel supply pressure	10 to 12	inches water column (0.36-0.43 psi)
Other	Nominal amp draw of starter in generator	60	amps
Other	Product Dimensions	14.5 x 11.5 x 3.5	in (368 x 292 x 89 mm)
Other	Product Dimensions	18 x 18 x 4	in (457 x 457 x 102 mm)
Other	Product Dimensions	9 x 6 x 5	in (229 x 152 x 127 mm)
Other	Product Weight	23	lbs (10.5 kg)
Other	Product Weight	24	lbs (11 kg)
Other	Product Weight	26	lbs (11.75 kg)
Other	Product Weight	5	lbs (2.25 kg)
Other	Starter motor maximum amps	50	Amps	performance test
Other	Under-frequency shutdown	below 55 Hz for more than 30 seconds	Hz
Other	displacement	220	cc
Other	displacement	410	cc
Other	displacement	530	cc
Other	displacement	760	cc
Other	displacement	992	cc
Pressure	Compression pressure	150	psi	cold engine
Pressure	Compression pressure	160	psi	cold engine
Pressure	Compression pressure	165	psi	cold engine
Pressure	Compression pressure	190	psi	cold engine
Pressure	Cylinder leak down - minimum air source	90	psi
Pressure	Cylinder leak down - regulated test pressure	80	psi
Pressure	Engine oil pressure - shut down threshold	below about 10	psi	engine running
Pressure	Fuel (LP Gas) inlet pressure	10-12	inch water column	all load ranges
Pressure	LP fuel pressure	10-12	inches water column (0.36-0.43 psi)
Pressure	Low oil pressure shutdown	5	PSI	switch contacts close below this, engine shuts down
Pressure	Minimum allowable compression pressure	60	psi	cold engine
Pressure	Minimum allowable compression pressure cold engine	60	psi	cold engine
Pressure	Normal engine oil pressure	35-40	psi	engine running
Pressure	Normal oil pressure	35-40	psi	engine running
Pressure	Oil pressure switch rating	10	psi
Pressure	Oil pressure switch rating	8	psi
Pressure	oil pressure	30	psi	full pressure lubrication, over 30 psi
Resistance	Brushless DPE winding resistance (Wire 2 to Wire 6)	0.97 and 1.13	Ohms
Resistance	Brushless stator winding resistance (11-22, 33-44)	0.12-0.14	Ohms
Resistance	Control Winding: Yellow-Yellow	0.16-0.18	Ohms
Resistance	DC Coil on Stator	0.2	Ohms
Resistance	DC Coil on Stator	0.3	Ohms

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

Recommended fluids

Fluid	Grade	Standard	Ambient	Capacity	Notes
Coolant	50% ethylene glycol-based long-life coolant / 50% clean, softened water		37°C to 149°C		Not applicable to this air-cooled 6kW model per Section 1.7 note (coolant table appears in the 24RCL doc, not this one); freezing protection to -37C, overheating protection to 149C if used
Engine oil		Manufacturer recommendations			Oil must be purchased separately based on manufacturer recommendations
Engine oil	10W-30				Oil will need to be purchased separately based upon the recommendations listed.
Engine oil	10W-30 / SAE 30			1.0 L	Oil capacity printed as 1.06 qt (1.0 L)
Engine oil	10W-30 / SAE30				Recommended Oil; lubrication method is splash
Engine oil	5W-30 Synthetic	API SJ, SL or better	below -12°C	0.6 L	Use below 10F
Engine oil	5W30
Engine oil	SAE 30				Oil will need to be purchased separately based upon the recommendations listed.
Engine oil	SAE 30 / 10W-30 / Synthetic 5W-30			1.0 L	See chart in Add Engine Oil; use petroleum-based oil for break-in before synthetic
Engine oil	SAE30				Recommended Oil as printed
Engine oil	Synthetic 5W-30				Oil will need to be purchased separately based upon the recommendations listed.
Engine oil	synthetic 5W-30				Below 10°F
Fuel	Clean, fresh, unleaded gasoline, minimum 87 octane/87 AKI (91 RON), up to 10% ethanol			29.9 L (7.9 gal)	DO NOT use E85 or gas/oil mix
Fuel	Gasoline				Fresh, clean gasoline
Fuel	LP vapor only	Minimum 2,520 Btu per cubic foot			Required fuel pressure 10-12 inches water column (0.36-0.43 psi)
Fuel	LP vapor, minimum 2,520 Btu per cubic foot				Required fuel pressure 10-12 inches water column (0.36-0.43 psi)
Fuel	Liquid Propane (LP Gas)				Fuel pipe must be sized for full load
Fuel	Natural Gas or LP Vapor				Fuel pressure: NG 3.5-7 in WC (Evolution), 5-7 in WC (Nexus); LP 10-12 in WC
Fuel	Regular unleaded gasoline, max 10% ethanol			9.0 U.S. gallons
Fuel	Unleaded			0.5
Fuel	gasoline	fresh, clean gasoline			Shelf life on gasoline is 30 days; a fuel stabilizer must be used at all times
Fuel	unleaded gasoline, minimum 85 octane				Do not use any gasoline with more than 10% added ethanol. Never use E85. Do not mix oil with gasoline.

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

Code	Name	Meaning	Severity	Action
1100	Overcrank	Engine Cranks but will not Start (5 crank attempts)	Shutdown	Problem 17
1200	Overspeed	Prolonged over specified Hz for 3 seconds	Shutdown	Test 12
1205	Overspeed	Instantaneous over specified Hz for 0.1 second	Shutdown	Test 12
1207	Overspeed	Monitors zero cross timing of AVR; 150 ms of 4500 rpm or higher	Shutdown	Test 64 and Test 60
1300	Low Oil Pressure	Occurred while running; check oil level and pressure	Shutdown	Test 61
1400	High Temperature	Air flow impeded; check inlet/outlet for debris	Shutdown	Test 62
1501	RPM Sensor	Twin Cylinder+Running; RPM sensor loss	Shutdown	Test 50 and Test 64
1505	RPM Sensor	Twin Cylinder+Cranking; RPM sensor loss	Shutdown	If engine cranks, Test 64. If not crank, Problem 15.
1511	RPM Sensor	Single Cylinder+Running; RPM sensor loss	Shutdown	Test 50 and Test 64
1515	RPM Sensor	Single Cylinder+Cranking; RPM sensor loss	Shutdown	If engine cranks, Test 64. If not crank, Problem 15.
1600	Underspeed	Unit is overloaded, slowing engine speed, fuel supply low or throttle control problem	Shutdown	Problem 3, or Test 50, or Test 12
1800	Overvoltage	Prolonged over-voltage	Shutdown
1900	Undervoltage	Prolonged under-voltage; below 80% for 10+ seconds	Shutdown	Preliminary Output Voltage Test
1901	Undervoltage	Instantaneous under-voltage due to sudden loss of voltage	Shutdown	Preliminary Output Voltage Test
1902	Undervoltage	Both zero crosses missing; faulty excitation winding or zero cross circuit	Shutdown	Preliminary Output Voltage Test
1906	Undervoltage	Single zero cross missing; faulty excitation winding or zero cross circuit	Shutdown	Preliminary Output Voltage Test
2099	Wiring Error	Mis-wired; customer connection low voltage and high voltage wires crossed	Shutdown	Check customer connection in generator
2100	Overload Remove Load	Overloaded - Default; one or both CTs detecting overload	Shutdown	Remove Load
2299	Undervoltage Overload	Unit was overloaded and attempted to start with large load	Shutdown	Remove Load
2399	Stepper Overcurrent	Current flow in stepper coil(s) above specification	Shutdown	Test 12
2400	Fuse Problem	Missing or damaged 7.5 amp controller fuse	Shutdown	Test 44
2800	Aux Shutdown	External shut down circuit is open	Shutdown	Check continuity of harness and operation of switch(es). Repair/replace as needed.
Red Short Flash	CO Module - Red Short Flash	Elevated level of CO in the area; module is functioning properly and protecting operators	Shutdown	Generator shuts down; module is functioning as intended
WARNING	Low Battery	Battery less than 12.1 Volts for 60 seconds	Warning	Test 45

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

Procedures

Adjust Magneto Flywheel Gap adjustment

Tools: 0.008-0.012 inch thickness gauge, screwdriver

Rotate flywheel until magnet under module.
Insert 0.008-0.012 inch non-metallic thickness gauge.
Loosen mounting screws.
Let magnet pull magneto against gauge.
Tighten screws.
Remove gauge by rotating flywheel.

Adjusting GT-530 Valve Clearance adjustment

⚠ Contact dealer if uncomfortable performing this procedure or lacking proper tools

Tools: 10mm allen wrench, Feeler gauge, Torque wrench

Remove spark plug wires and spark plugs
Rotate the flywheel clockwise to bring the piston to Top Dead Center of compression stroke
Remove the four valve cover screws and the valve cover
Loosen the rocker jam nut and turn the pivot ball stud while checking clearance with a feeler gauge
Set clearance to 0.002-0.004 inch (0.05-0.1 mm) and hold pivot stud while tightening jam nut to 174 in/lbs
Recheck clearance after tightening
Install a new valve cover gasket and reattach the valve cover
Reinstall spark plugs and reattach spark plug wires

Adjusting Valve Clearance adjustment

Tools: feeler gauge, 10mm Allen wrench, torque wrench

Ensure the engine is cool (60-80°F) before checking
Remove spark plug wires and spark plugs
Rotate the flywheel nut clockwise to bring the piston to Top Dead Center (both valves closed)
Remove the four screws attaching the valve cover; remove and discard the rocker cover gasket
Loosen the rocker jam nut; use a 10mm Allen wrench to turn the pivot ball stud while checking clearance with a feeler gauge
Correct clearance is 0.002-0.004 inch (0.05-0.1 mm)
Hold the pivot ball stud and tighten the rocker arm jam nut to 174 in/lbs torque
Recheck valve clearance after tightening
Install new valve cover gasket and re-attach valve cover, torque fasteners in a cross pattern to 4 ft/lbs
Install spark plug and re-attach spark plug wire
Repeat for the other cylinder

Check and Adjust Valves adjustment

⚠ Automatic start-up. Disconnect utility power before working on unit.

Tools: 10mm wrench, 13mm wrench, 14mm wrench, 8mm wrench, 10mm Allen wrench, feeler gauge

Remove valve cover.
Loosen rocker jam nut.
Turn pivot ball stud to adjust clearance to 0.05-0.1mm (0.002-0.004 in).
Tighten jam nut to specified torque.
Recheck clearance.
Install new valve cover gasket and cover.

Check/Adjust Valves adjustment

Tools: socket, feelers/gauges

Verify the piston is at top dead center (TDC) of its compression stroke (both valves closed).
Remove four (4) screws from rocker cover.
Remove rocker cover and rocker cover gasket.
Loosen rocker arm jam nut. Turn adjustment screw in to decrease clearance or out to increase clearance.
Hold socket steady and tighten lock nut to specification; check clearance and make minor adjustments.
After tightening jam nut, recheck valve clearance to make sure it did not change.
Install rocker cover, gasket and four screws; tighten to specifications.

Current Calibration adjustment

⚠ Electrocution. Lethal voltage may be present at CTs.

Tools: clamp-on ammeter

Connect load bank to output.
Place amp meter over circuit.
Start generator and warm up.
Apply rated load.
Select Current Calibration menu.
Adjust display to match amp meter.
Save calibration.
Repeat for CT2.

Test 12 – Adjust Voltage Regulator adjustment

⚠ Ensure all material is clear of the alternator before proceeding.

Tools: VOM

Remove cover from end of alternator assembly.
Remove two screws holding down the voltage regulator (AVR).
Leave AVR connected to stator and brushes.
Set VOM to measure AC voltage.
Connect VOM across a 240VAC socket.
Set START-STOP-RUN switch to START.
Turn adjustment screw clockwise to increase voltage, counterclockwise to lower.

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

Tools: feeler gauge, crow foot wrench

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

Test 27 - Check / Adjust Governor adjustment

Tools: AC frequency meter

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

Test 33 – Check Valve Adjustment adjustment

⚠ Use a new rocker arm cover gasket.

Tools: feeler gauge, allen wrench, crow's foot

Adjust valve clearance with engine at room temperature.
Position piston at TDC of compression stroke (both valves closed).
Loosen the rocker arm jam nut.
Turn pivot ball stud while checking clearance with a feeler gauge.
Hold stud with allen wrench and tighten jam nut to specified torque with a crow's foot.
Recheck valve clearance after tightening.

Test 40 – Check / Adjust Governor (389/206/163cc Engines) adjustment

⚠ Do not apply excessive torque to the governor shaft.

Tools: frequency meter

Loosen the governor lever clamp bolt.
Hold governor lever at full INC RPM; rotate governor shaft counterclockwise fully.
Tighten governor lever clamp bolt to 110 inch-pounds.
Turn speed adjustment screw counterclockwise three full turns.
Start engine and let it warm up and stabilize at no-load.
Connect frequency meter; set no-load frequency 62.0-62.5 hertz.
Add a drop of Loctite 241 to the speed adjust screw threads.

Test 41 – Check / Adjust Governor (410cc Engine) adjustment

Tools: frequency meter

Loosen the governor clamp bolt.
Hold governor lever at wide open throttle; rotate governor shaft clockwise fully.
Tighten governor lever clamp bolt to 70 inch-pounds (8 Nm).
Start generator; let it stabilize and warm up at no-load.
Connect frequency meter across generator AC output leads.
Turn the primary adjust screw to obtain a frequency of 62.5 Hz.

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

Voltage reconnection

Voltage	Phase	Connection	Notes
120	1	Standard configuration	Single phase 120 VAC
120/240	Single	L14-30 (models 6852-6854)	30 Amp inlet for 6852-6854; CS6377 inlet for 9854-9855 (50 Amp)
240	1	With conversion kit 006016-1	Single phase 240 VAC (maintains full 6 kW output)

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 OHVI family

144

Part #	Description	Category
073111	FILTER, AIR	Air filter
0H43470140	AIR CLEANER	Air filter
0K1291	ALTERNATOR ASSY.	Alternator
0H2579B	AVR 5.5-7.5KW VISION ALT	Avr
0J86620104	BAFFLE	Baffle
005819-0	26R Wet Cell Battery	Battery
0B1214	BOLT, M8X45	Bolt
0E9470	BOLT, M8X16	Bolt
0E9507B	BOLT, M8X25	Bolt
0E9507C	BOLT, M8X20	Bolt
0G8382	SCREW, PAN, M5 X 16	Bolt
0G84420194	BOLT, M6X12	Bolt
0H12810104	BOLT, M6X185	Bolt
0H1780	BOLT, CURVED HEAD, M8X40	Bolt
0H1781	BOLT, CARRIAGE HEAD M8XX46	Bolt
0H91980158	BOLT, FLANGE, M5X220	Bolt
0J00620100	BOLT, M5X10	Bolt
0J35220156	BOLT, M6X20	Bolt
0J4967	BOLT, M5X12	Bolt
0J4968	BOLT, M5X16	Bolt
0J86620103	BOLT, M10X275	Bolt
0K0100	BOLT, M6X28	Bolt
0G8542	BRACKET, MUFFLER	Bracket
0H97670ST15	BRACKET, HANDLE	Bracket
0H0265C	BREAKER, CIRCUIT, 20A	Breaker
0H0265E	BREAKER, CIRCUIT, 30A	Breaker
0H0919	BRUSH, ALTERNATOR	Brush
0G5442	SnapButton	Button
0H0958	CAP, FUEL	Cap
0H9760	CAP, END	Cap
048031B	CLAMP, HOSE, 09	Clamp
0J35220173	CLAMP, 012	Clamp
0J35220174	CLAMP, 010	Clamp
0G9391	COVER, OUTLET	Cover
0G9392	COVER, OUTLET	Cover
0G9756	COVER, BACK PANEL	Cover
0H3049	COVER ALTERNATOR INLET 5-7KW	Cover
0G8442C	ENGINE, 389cc	Engine
0G9914	FILTER, FUEL	Filter
0K0099	FOOT, RUBBER	Foot
0J86620100	FRAME	Frame
0K0097	FRAME, BENT FOOT	Frame
0H1326	Fuel Filter	Fuel filter
0H43470112	CUP, FUEL FILTER	Fuel filter
0H43470180	FILTER, GAS	Fuel filter
0G9028	GASKET, EXH, CYLNDR	Gasket
0H43470123	GASKET	Gasket
0H43470143	GASKET, CARBURETOR, (OUT B)	Gasket
0H43470145	GASKET, CARBURETOR, (OUT A)	Gasket
0H43470147	GASKET, CARBURATOR (IN)	Gasket
0H43470189	GASKET, MUFFLER	Gasket
0H43470203	WASHER/ GASKET, HOOK	Gasket
0H43470288	GASKET, VALVE COVER	Gasket
0H43470309	GASKET, EXHAUST PIPE	Gasket
0H43470312	GASKET, CAMSHAFT	Gasket
0J4691	GASKET, EXH., MUFFLER	Gasket
0G8442C113	GRIP, HANDLE	Handle
0H97560ST15	HANDLE	Handle
0E0683A	Tailpipe: 16 in run, 1-1/4 in diameter	Hose
0E0907	RV Twin Exhaust Pipe: 26 in run, 1-1/2 in diameter	Hose
0G5857	Tailpipe: 25 in run, 1-1/4 in diameter	Hose
0G9757A	HOSE, FUEL, 08X55	Hose
0G9757B	HOSE, FUEL, 08X80	Hose
0H43470152	AIR TUBE	Hose
0H43470174	HOSE, OIL DISCHARGE	Hose
0H43470176	HOSE, FUEL PUMP OIL INJECTION A	Hose
0H43470181	HOSE, FUEL PUMP	Hose
0H43470182	HOSE, FUEL PUMP AIR	Hose
0H43470183	HOSE, FUEL PUMP OIL INJECTION B	Hose
0K0091	HOSE FORMED ROV-AIRBOX	Hose
0H91980171	HOUSING, REAR BEARING	Housing
0H1610A	ANTI-CRUSH 10.8OD 9ID 10LG	Lining
0J4535A	MANIFOLD, EXHAUST	Manifold
0G8321	METER, HOUR	Meter
0H9005	METER, FUEL	Meter
0H1783	MOUNT, RUBBER VIB	Mount
0H9763A	MUFFLER	Muffler
0G84420107	NUT, M10	Nut
0G84420272	NUT, M6	Nut
0H1782	CAP NUT M8-1.25 BLACK ZINC	Nut
0J35220161	NUT, M8	Nut
0J86620108	NUT, M4	Nut
0K0094	NUT, M6	Nut
0K0098	NUT, M8	Nut
0K0105	NUT, M6	Nut
070185B	OIL FILTER	Oil filter
005703-0	Paint Kit	Service part / kit
005839-0	Fascia Base Wrap Kit	Service part / kit
006004-0	Scheduled Maintenance Kit	Service part / kit
006016-0	240V Conversion Kit	Service part / kit
022304	WASHER FLAT 1/2 ZINC	Service part / kit
067989	NUT HEX FL WHIZ M8-1.25	Service part / kit
0C7108	Scheduled maintenance kit	Service part / kit
0E1130	Scheduled maintenance kit	Service part / kit
0E1744	Scheduled maintenance kit	Service part / kit
0H0839	Scheduled maintenance kit	Service part / kit
0H43470136	IGNITION COIL	Service part / kit
0H43470173	VALVE, FUEL	Service part / kit
0H43470211	DIODE, RECTIFIER	Service part / kit
0H43470216	BREAKER, DC CIRCUIT	Service part / kit
0H43470299	BEARING, BALL	Service part / kit
0H43470310	TAPPET, VALVE	Service part / kit
0H43470316	BEARING, OIL RETAINER	Service part / kit
0H97480ST03	FRAME, RAIL	Service part / kit
338-4084	Harness, Switch (P2) (Includes Parts Marked @)	Service part / kit
338-4085	Genset to Battery	Service part / kit
338-4087	Lead Harness	Service part / kit
338-4089	For AC Display from Genset	Service part / kit
696471068528	Transfer Switch Model 6852	Service part / kit
696471068535	Transfer Switch Model 6853	Service part / kit
696471071481	Transfer Switch Model 9854	Service part / kit
696471071498	Transfer Switch Model 9855	Service part / kit
96471068542	Transfer Switch Model 6854	Service part / kit
0D4968	OUTLET 20A 120V DPLX	Outlet
0G8758	OUTLET 30A 120/250V SPCGR	Outlet
0H9749AST03	PANEL RAIL BACK	Panel
0H9775B	PANEL ASSY., CONTROL	Panel
0D4999	PIN, COTTER	Pin
0H0204	PIN, AXLE	Pin
0J4536	FACE PLATE, CNTRL PNL ASSY.	Plate
0H43470184	FUEL PUMP ASSY.	Pump
338-4086	Genset to Pump Actuator	Pump
0H1411B	RUBBER, FUEL TANK	Rubber
0H9761	ALTERNATOR SCROLL	Scroll
0H43470163	SEAL, COVER	Seal
0H43470177	O-RING	Seal
0H43470192	SEAL, EXHAUST COVER	Seal
0H43470196	O-RING, RUBBER	Seal
0H43470303	OIL SEAL, CRANKSHAFT	Seal
0H43470306	SENSOR ASSY., OIL	Sensor
338-4088	For Oil Temperature Display from Sensor	Sensor
0E7585	SPARK PLUG	Spark plug
0H8096	SPARK PLUG	Spark plug
0J00620106	Spark Plug	Spark plug
0G9911	SWITCH, ON/OFF RED-ROTARY	Switch
0H7510A0SRV	TANK, FUEL, 7 GAL	Tank
0J6072	TERMINAL	Terminal
0J0974	SHUT-OFF VALVE, FUEL	Valve
0J7921	ROLL OVER VALVE	Valve
070264	WASHER, FLAT, M10X4	Washer
0J47870118	WASHER, FLAT 6X0.8	Washer
0K0093	WASHER, SPECIAL LOCK	Washer
0K6011	WHEEL	Wheel
0K0092	WIRE ASSY., GRND	Wire

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 OHVI?

The Generac OHVI engine has an oil capacity of 4.0 liters.

What is the displacement of the Generac OHVI?

The Generac OHVI has a displacement of 0.53 liters with 1 cylinders.

Which generators use the Generac OHVI engine?

The Generac OHVI powers 39 generator set(s), including Generac EcoGen 005818-0, Generac EcoGen 6 kW, Generac GP15000, Generac GP17500, Generac GP1800.

How often should you change the oil in the Generac OHVI?

The Generac OHVI oil change interval is every 100 hours.

What is a common problem with the Generac OHVI engine?

A commonly reported issue on generators using the Generac OHVI is: Poor compression. Cause: Loose cylinder head bolts.