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Generac OHVI Engine

Name: Generac OHVI Engine
Brand: Generac

The Generac OHVI is a 0.41 L 1-cylinder naturally aspirated engine rated at 3600 rpm, producing up to 8 kW. It powers generator sets from Generac, including the EcoGen 005818-0, EcoGen 6 kW, GP15000 and GP17500. It holds 1.5 L (0.4 gal) of oil.

Also known as: Generac OHVI, OHVI

0.41 L

Displacement

Cylinders

3600 rpm

Rated speed

8 kW

Gross power

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

Engine specifications

Oil capacity	1.5 L
Displacement	0.41 L
Cylinders	1
Aspiration	naturally aspirated
Rated speed	3600 rpm
Gross power	8 kW

Generator sets powered by this engine

Generac EcoGen 005818-0 Generac EcoGen 6 kW Generac GP15000 Generac GP17500Generac GP175000EGenerac GP1800 Generac GP3250 Generac GP5000 Generac GP5500 Generac GP6500 Generac GP7000 Generac GP7500 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

Recoil Cord Will Not Pull
Cause: BAD
Fix: TEST 49 – TEST RECOIL FUNCTION TEST 50 – TEST ENGINE FUNCTION REPAIR OR REPLACE
Engine ‘Hunts’ / Erratic Idle
Cause: NO SURGING STILL SURGING
Fix: TEST 29 – CHECK CARBURETION GOOD TEST 40 – CHECK AND ADJUST GOVERNOR
Engine Will Not Crank
Cause: NO VOLTAGE MEASURED 12 VDC MEASURED
Fix: RECHARGE OR REPLACE BATTERY – CLEAN, REPAIR OR REPLACE BAD CABLE(S) BAD REPLACE BAD GOOD NO VOLTAGE MEASURED BAD 12 VDC MEASURED REPLACE STARTER MOTOR IF DEFECTIVE GOOD CHECK FOR MECHANICAL BINDING OF THE ENGINE OR ROTOR
Engine Turns Over But Will Not Start
Cause: NO SPARK
Fix: TEST 39 – REMOVE WIRE 18 / SHUTDOWN LEAD NO SPARK GOOD BAD REPLACE SWITCH BAD CHECK ENGINE OIL LEVEL TEST 45 – CHECK OIL LEVEL SWITCH TEST 24 – TEST OFF-ON SWITCH REPLACE SWITCH REPLENISH OIL REPLACE LOW OIL ALARM GOOD OIL LEVEL O.K. OIL LEVEL LOW BAD
Engine Starts Hard and Runs Rough
Cause: ADJUST VALVES AND RETEST
Fix: BAD TEST 40 – CHECK AND ADJUST GOVERNOR TEST 38 – CHECK FLYWHEEL
No Battery Charger DC output.
Cause: 1. Battery posts are corroded. 2. Battery cable is bad. 3. Battery is defective. 4. Receptacle is bad. 5. Battery Charger in-line fuse (1.5A) melted open.
Fix: 1. Clean battery posts. 2. Replace cable. 3. Check battery condition; replace if defective. 4. Contact Authorized Service Facility. 5. Replace fuse with identical 1.5A replacement fuse only (located inside control panel).
Engine will not start; or starts and runs rough.
Cause: 1. Fuel shut-off is OFF. 2. Dirty air cleaner. 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 cleaner. 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.
Engine will not crank.
Cause: 1. Battery weak or dead.
Fix: 1. Recharge or replace battery (see 'No Battery Charger DC output' at bottom of guide). 2. Start engine manually using recoil starter.
Engine shuts down during operation.
Cause: 1. Out of gasoline. 2. Low oil level. 3. Fault in engine.
Fix: 1. Fill fuel tank. 2. Fill crankcase to proper level. 3. Contact Authorized Service Facility.
Engine runs good but bogs down when loads are connected.
Cause: 1. Short circuit in a connected load. 2. Generator is overloaded. 3. Engine speed is too slow. 4. Shorted generator circuit.
Fix: 1. Disconnect shorted electrical load. 2. See 'Don't Overload the Generator'. 3. Contact Authorized Service Facility. 4. Contact Authorized Service Facility.
Engine lacks power.
Cause: 1. Load is too high. 2. Dirty air filter. 3. Engine needs to be serviced.
Fix: 1. See 'Don't Overload the Generator'. 2. Replace air filter. 3. Contact Authorized Service Facility.
Engine is running, but no AC output is available.
Cause: 1. Circuit breaker is open. 2. Poor connection or defective cord set. 3. Connected device is bad. 4. Fault in generator. 5. GFCI trips the 20 Amp outlets.
Fix: 1. Reset circuit breaker. 2. Check and repair. 3. Connect another device that is in good condition. 4. Contact Authorized Service Facility. 5. Repair the 'short' and reset the GFCI.
Engine ‘hunts’ or falters.
Cause: 1. Choke is opened too soon. 2. Carburetor is running too rich or too lean.
Fix: 1. Move choke to halfway position until engine runs smoothly. 2. Contact Authorized Service Facility.
Unit Shuts Down for Low Oil
Fix: TEST 20 – TEST OIL LEVEL SWITCH CHECK OIL LEVEL GOOD
The resistance measured between the all tests points should be as follows: iX 1600 0.2 Ohms, iX 2000 0.3 Ohms
Fix: Replace the stator

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 $8.99 eBay $35.00 FridayParts $32.07
Spark plug	Champion RC14YC; gap 0.030" (0.76mm)		0J00620106		Amazon $8.99 eBay $35.00 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	100 hr	12 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
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
Valve clearance	Check	500 hr	12 mo	First service — Check/adjust after first 50 hours, then every 300 hours thereafter or every year
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	0.76	mm (0.030 inch)
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	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	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	Normal engine oil pressure	35-40	psi	engine running
Pressure	Oil pressure switch rating	10	psi	single cylinder engines
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 Winding Blue	0.19-0.21	Ohms
Resistance	DC Winding Blue	0.86 ±15%	Ohms
Resistance	DC Winding: Green-Green	0.13-0.15	Ohms
Resistance	Exciter Windings - GP1800 (alt 0H8255/0J0819)	2.53	Ohms
Resistance	Exciter Windings - GP3250 (alt 0H2626/0H3578)	1.72	Ohms
Resistance	Exciter Windings - GP5500/GP/LP5500 (alt 0G9769/0J8363)	2.81	Ohms
Resistance	Exciter Windings - GP6500E (alt 0H9920/0K1291)	2.9 ± 10%	Ohms
Resistance	Exciter Windings - GP7500E DF-CO (alt A0001920613/A0000121536)	1.928	Ohms
Resistance	Exciter Windings - GP8000E COSTCO (alt 0J8438/0K9791)	1.626	Ohms
Resistance	Exciter Windings - LP3250 (alt 0J2561/0J6032)	2	Ohms
Resistance	Ignition Coil Winding (J1 Pin 5)	0.5	Ohms
Resistance	Ignition Coil Winding (J1 Pin 5)	0.7	Ohms
Resistance	Ignition Coil Winding (J1 Pin 5)	0.8	Ohms
Resistance	Ignition coil Pin 1 to Ground	1.7 ± 0.5	Ohms
Resistance	Ignition coil Spark Plug to Ground	12.5K ± 2K	Ohms
Resistance	Ignition: Blue-Yellow/Green	0.63-0.71	Ohms
Resistance	Main Coil of Stator	1.6 ± 0.4	Ohms
Resistance	Main Coil of Stator	1.9	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	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	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
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

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

Procedures

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/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.

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.

Trigger Pickup Adjustment (iQ) adjustment

Tools: non-metallic feeler gauge

Install or replace trigger pickup; ensure routing of wires is correct and not pinched.
With rotor in place, set gap to 0.20-0.30mm using the oval holes in the pickup bracket.
Align trigger point on rotor outside surface in-line with sensor and check/adjust gap with a non-metallic feeler gauge.
Tighten mounting screws to specification and check gap; adjust if necessary.

Check Engine Compression diagnostic

Tools: compression gauge

Remove spark plug.
Insert an automotive type compression gauge into spark plug hole.
Crank engine until there is no further increase in pressure; record highest reading.

Check Engine RPM diagnostic

Tools: Small engine tachometer or inductive tachometer

With engine running, connect engine tachometer per manufacturer instructions and record the engine RPM.
If engine rpm is within rated specs refer to flow chart; if outside range go to Problem 7 flowchart.

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	Leads	Notes
120	1	Standard configuration		Single phase 120 VAC
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.

Common questions

What is the oil capacity of the Generac OHVI?

The Generac OHVI engine has an oil capacity of 1.5 liters.

What is the displacement of the Generac OHVI?

The Generac OHVI has a displacement of 0.41 liters with 1 cylinders.

Which generators use the Generac OHVI engine?

The Generac OHVI powers 41 generator set(s), including Generac EcoGen 005818-0, Generac EcoGen 6 kW, Generac GP15000, Generac GP17500, Generac GP175000E.

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: Recoil Cord Will Not Pull. Cause: BAD. Fix: TEST 49 – TEST RECOIL FUNCTION TEST 50 – TEST ENGINE FUNCTION REPAIR OR REPLACE.