Service parts for the V-10 6.8L
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Liquid Propane or Natural Gas |
|---|---|
| Frequency | 60.0 Hz |
| Controller | H-100 |
| Alternator | 390 (Class NEMA MG1-32.6, NEMA MG1-1.66 insulation) |
| Voltage options | 120/240 V, 120/208 V, 277/480 V |
| Battery group | 27F |
| Battery cranking | 700 CCA @ 0°F CCA |
| Starting system | 12 Volts V DC |
| Max ambient | 50 °C |
Maintenance & consumables
for the Generac V-type 6.8L| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | ELEMENT AIR FILTER | 0F5419 | Amazon eBay $26.99 NAPA $11.24 | ||
| Fuel filter | — | 1000 hr | |||
| Oil filter | OIL FILTER, FORD V-10 ENGINE | 0D5419 | Amazon eBay $16.80 NAPA $9.09 | ||
| Battery | — | 1000 hr | |||
| Belt | BELT SERPENTINE (65.0" LG) (1800 RPM) | 0D3488G | Amazon eBay $65.54 | ||
| Coolant | — | 1000 hr | |||
| Coolant filter | — | 500 hr | |||
| Oil | — | 1000 hr | |||
| Spark plug | — | 500 hr |
Service intervals
18| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine oil level | Check | 10 hr | 1 mo | At least every 20 hours of operation or prior to use |
| Engine break-in oil and filter | Change | 30 hr | First service — First 30 operating hours | |
| Engine oil and oil filter | Change | 100 hr | First service — First 100 operating hours; thereafter every 150 hours or 6 months | |
| Air cleaner | Clean | 500 hr | Service air cleaner | |
| Engine DC alternator | Check | 500 hr | ||
| Starter | Check | 500 hr | ||
| Battery state of charge and condition | Check | 3 mo | Performed by authorized service dealer | |
| Cooling system | Drain | 12 mo | Flush cooling system | |
| Cooling system | Inspect | 1 mo | At least once each month | |
| Engine governor | Test | 12 mo | Adjust or repair if needed | |
| Engine ignition system | Check | 3 mo | ||
| Engine safety devices (low oil pressure, low coolant level, high coolant temperature) | Test | 6 mo | ||
| Exhaust system | Inspect | 3 mo | ||
| Fan belts | Check | 3 mo | ||
| Fuel system | Test | 3 mo | ||
| Generator | Clean | 12 mo | Clean, inspect generator | |
| Spark plugs | Clean | 12 mo | Clean/re-gap or replace as necessary | |
| Transfer switch | Check | 3 mo |
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
4| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Gap | Spark plug gap | 1.14 | mm (0.045 inch) | |
| Other | Belt tension deflection (midway between pulleys) | 3/8 to 5/8 | inch (10 to 16 mm) | 22 pounds (10 kg) force |
| Speed | Engine timing BTDC at 1800 rpm (6.8L NG/LP) | 22 | degrees | 1800 rpm |
| Speed | Engine timing BTDC at 3600 rpm (6.8L NG/LP) | 24 | degrees | 3600 rpm |
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 | 50-50 low silicate ethylene glycol base anti-freeze and deionized water | Low silicate anti-freeze | 4.5 U.S. gal. | Add high quality rust inhibitor if desired | |
| Engine oil | 5W-20 (factory fill); 5W-30 | For Service SJ or SH | 5.0 U.S. qts. | Use 5W-30 synthetic oil below 32°F | |
| Fuel | Natural gas at least 1,000 Btu/cu ft; LP gas at least 2,520 Btu/cu ft | Operating fuel pressure 11 in. - 14 in. water column | |||
| Gear oil | SAE 90 gear lubricant | For generator gearbox (if equipped) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
8Spark Plugs adjustment
⚠ Do not blast the spark plugs to clean.
Tools: wire feeler gauge, wire brush
- Clean the area around the base of the spark plugs.
- Remove the spark plugs and check the condition. Replace if worn.
- Check the spark plug gap using a wire feeler gauge. Adjust gap to 1.14 mm (0.045 inch).
Catalyst and Heat Shield Assembly installation
⚠ Catalyst must be mounted in described position.
- Disconnect battery cables; disconnect negative first.
- Insert outlet pipe 2 to 3 inches into outlet of catalyst; slide one U-bolt onto outlet and tighten.
- Slide remaining U-bolt and catalyst over exhaust pipe; insert 2 to 3 inches into inlet; align flat side; tighten U-bolt.
- Sub-assemble heat shield panels and cap using screws provided.
- Slide heat shield subassembly over the catalyst.
- Fasten heat shield assembly to enclosure using screws provided.
- Install rain cap over outlet of catalyst and tighten.
Preparation for Start-up (Start-up Checklist) installation
Tools: manometer
- Ensure the 120VAC circuit breaker to the battery charger is open.
- Remove the 15 Amp ATO fuse from the control panel.
- Connect the battery cables to the battery; attach negative cable last.
- Close the 120VAC circuit breaker to the battery charger.
- Measure battery voltage before and after charger is turned on.
- Verify all AC electrical connections are tight.
- Check all hoses, clamps, fittings for leaks or damage.
- Open the valve to the engine fuel line and bleed the fuel system of air.
- Open the generator main line circuit breaker.
- Connect a manometer to the gas line and record static pressure.
- Insert the fuse into the control panel.
- Move the AUTO/OFF/MANUAL switch to manual; engine should crank and start.
- Check voltage at the generator terminals and phase rotation for 3-phase units.
- Close the generator main line circuit breaker and turn the set off.
Battery Maintenance maintenance
⚠ Storage batteries give off explosive hydrogen gas.
⚠ Battery electrolyte fluid is an extremely caustic sulfuric acid solution.
⚠ Do not use any jumper cables or booster battery to crank and start the generator engine.
Tools: automotive-type battery hydrometer
- Inspect the battery posts and cables for tightness and corrosion. Tighten and clean as necessary.
- Check the battery fluid level of unsealed batteries and fill with DISTILLED WATER ONLY.
- Have the state of charge and condition checked with an automotive-type battery hydrometer.
Changing Engine Oil maintenance
⚠ Hot oil may cause burns. Allow engine to cool before draining oil.
⚠ NEVER OPERATE ENGINE WITH OIL BELOW THE DIPSTICK ADD MARK.
- Remove OIL DRAIN HOSE from its retaining clip.
- Loosen and remove OIL DRAIN HOSE CAP. Drain oil completely into suitable container.
- Install and tighten OIL DRAIN HOSE CAP, re-install into its retaining clip.
- Turn OIL FILTER counterclockwise and remove. Dispose of old filter.
- Apply light coating of new engine oil to seal of new oil filter. Install and tighten by hand only.
- Remove OIL FILL CAP. Add recommended oil. Do not fill above dipstick FULL mark.
- Start engine and check for oil leaks.
- Shut OFF engine and wait 10 minutes for oil to settle. Recheck oil level.
- Dispose of used oil at a proper collection center.
Changing the Engine Air Cleaner maintenance
- Remove the air cleaner cover.
- Replace the air filter making sure it is positioned properly before reattaching the cover.
Engine Start-up and Transfer operation
⚠ Do not crank the engine continuously for longer than 30 seconds.
- Turn OFF or disconnect the utility power circuit to the transfer switch.
- Set the transfer handle to its UTILITY (NORMAL) position.
- Set the generator's main line circuit breaker to its OFF position.
- Start the generator.
- Let engine stabilize and warm up.
- Check all applicable instrument and gauge readings.
- Move the transfer switch manual handle to STANDBY position.
- Set the generator's main line circuit breaker to its ON position.
Retransfer and Shutdown operation
- Set the generator's main line circuit breaker to its OFF position.
- Manually move the transfer switch handle to its UTILITY (NORMAL) position.
- Turn ON the utility power supply to the transfer switch.
- Let the generator run at no-load for a few minutes to stabilize internal temperatures.
- Shut down the generator.
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 |
|---|---|---|---|---|
| 120/208V | 3 | Stator Power Winding Connections - 3-phase, Y configuration | 6 | L-L 208V; L-N 120V |
| 120/240V | 3 | Stator Power Winding Connections - 3-phase, Delta configuration | 6 | Rated voltage E1-E2, E1-E3, E2-E3 is 240V; E1 or E3 to neutral 00 is 120V |
| 240V | 1 | Four-lead, Single-phase Stator (voltage code A) | 4 | Rated voltage between terminals 240V; terminal to neutral 00 is 120V |
| 277/480V | 3 | Stator Power Winding Connections - 3-phase, Y configuration | 6 | L-L 480V; L-N 277V |
| 346/600V | 3 | Stator Power Winding Connections - 3-phase, Y configuration | 6 | L-N 346V |
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
Which engine powers the Generac V-10 6.8L?
The Generac V-10 6.8L is powered by the Generac V-type 6.8L engine.
What fuel does the Generac V-10 6.8L use?
The Generac V-10 6.8L runs on Liquid Propane or Natural Gas.
What voltage does the Generac V-10 6.8L produce?
The Generac V-10 6.8L is offered in 120/240 V, 120/208 V, 277/480 V.
What size battery does the Generac V-10 6.8L need?
The Generac V-10 6.8L uses 700 CCA @ 0°F CCA, group 27F, per the manufacturer specification sheet. The starting system is 12 Volts V DC.
Which alternator is fitted to the Generac V-10 6.8L?
The Generac V-10 6.8L uses a 390 alternator. Insulation class NEMA MG1-32.6, NEMA MG1-1.66.
Which oil filter part number does the Generac V-10 6.8L take?
The Generac V-10 6.8L uses oil filter part number 0D5419.
What air filter does the Generac V-10 6.8L use?
The Generac V-10 6.8L uses air filter part number 0F5419.
Troubleshooting
7Fault codes
| Code | Meaning |
|---|---|
| FuelSys006 | Fuel System Fault |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine won’t crank. | 15 amp fuse blown; Loose or corroded or defective battery cables; Defective starter contactor; Defective starter motor; Dead or Defective Battery; 5 amp fuse blown | 1. Replace fuse; 2. Tighten, clean or replace battery cables as necessary; 3. Replace contactor; 4. Replace starter motor; 5. Remove, change or replace battery |
| Engine cranks but won't start. | Out of fuel; Fuel solenoid (FS) is defective; Open Wire #14A from Engine Control circuit board; Spark plugs defective; Door on tank not closed | 1. Replenish fuel; 2. Replace solenoid; 3. Reconnect wire; 4. Clean, regap or replace plugs; 5. Close door on tank |
| Engine starts hard, runs rough. | Flame arrestor (air cleaner) plugged or damaged; Plugged fuel line; Defective spark plugs; Fuel pressure incorrect | 1. Clean or replace as needed; 2. Unclog fuel line; 3. Clean, regap or replace plugs; 4. Confirm fuel pressure to regulator is as recommended in SPECIFICATIONS |
| Engine starts then shuts down. | Engine oil level is low; Engine is overheated; Defective Low Oil Pressure Switch; Defective Coolant Temperature Switch; Defective Control Module circuit board; Coolant Level is Low; Defective Low Coolant Level Switch | 1. Check oil and add oil as needed; 2. Check cooling system for leaks; 3. Replace switch; 4. Replace switch; 5. Replace board; 6. Repair leak - Add coolant; 7. Replace Switch |
| AUTO/OFF/MANUAL Switch at OFF, engine continues to run. | Defective AUTO/OFF/MANUAL switch; Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board; Defective Control Module circuit board | 1. Replace switch; 2. Reconnect/close wire; 3. Replace board |
| No AC output from generator. | Check main line circuit breaker; Check circuit breaker & fuses; Transfer switch set to NORMAL position; Generator internal failure; Thermal circuit breaker open | 1. Reset to ON or CLOSED; 2. Reset and replace, if necessary; 3. Set to GENERATOR position; 4. *; 5. Auto-reset - Wait 5 min. and attempt restart |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
7- Battery Maintenance
- Catalyst and Heat Shield Assembly
- Changing Engine Oil
- Engine Start-up and Transfer
- Preparation for Start-up (Start-up Checklist)
- Retransfer and Shutdown
- Spark Plugs
Step-by-step procedures compiled from the Generac service manual for this model.
Parts
51| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 029032 | HOSE 9/32 ID (43"LG) | 1 | Hose | Amazon eBay |
| 059057 | HOSE 3/4 ID SAE-30R2 | 1 | Hose | Amazon eBay |
| 069860E | HOSE DRAIN ASSY 28" | 1 | Hose | Amazon eBay |
| 077879 | HOSE VACUUM 5/32 | 1 | Hose | buy |
| 095613 | SEAL OIL | 1 | Seal | eBay |
| 095971 | SEAL OIL | 1 | Seal | eBay |
| 0A6765 | RING GASKET 2.5 DIA | 2 | Gasket | eBay |
| 0D2244M | ASSY MAGPICKUP (3/8-24 MALE) | 1 | Sensor | Amazon eBay $127.65 FridayParts $18.08 |
| 0D2698 | GASKET ADAPTER THROT BODY | 1 | Gasket | eBay |
| 0D3488 | BELT SERPENTINE (67.16" LG) (3000 RPM) | 1 | Belt | Amazon eBay $55.43 |
| 0D3488G | BELT SERPENTINE (65.0" LG) (1800 RPM) | 1 | Belt | Amazon eBay $65.54 |
| 0D3488J | BELT SERPENTINE (65.3" LG) (2300 RPM) | 1 | Belt | Amazon eBay $50.38 |
| 0D3488K | SERPENTINE BELT (68.3" LG) (3600 RPM) | 1 | Belt | Amazon eBay $47.35 |
| 0D4255 | GASKET EXHAUST MANIFOLD | 2 | Gasket | Amazon eBay |
| 0D5419 | OIL FILTER, FORD V-10 ENGINE | 1 | Oil filter | Amazon eBay $16.80 NAPA $9.09 |
| 0E0502 | TEMPERATURE SENDER DELPHI | 1 | Sensor | Amazon eBay $39.79 |
| 0E4390 | GASKET GOVERNOR ACTUATOR | 1 | Gasket | eBay $417.99 |
| 0F2097 | GASKET 390 GEARBOX | 1 | Gasket | eBay |
| 0F2256 | ASSY PCB PWR AVR W/AMP HEADER | 1 | Avr | eBay $200.00 |
| 0F2686 | HOSE RADIATOR UPPER CPL | 1 | Hose | Amazon eBay $65.00 |
| 0F3158 | OIL COOLER FORD (150KW 3600RPM) | 1 | Oil cooler | eBay |
| 0F4269 | GASKET MIXER BODY | 1 | Gasket | Amazon eBay |
| 0F4301 | HOSE OIL COOLER (150KW 3600RPM) | 1 | Hose | eBay |
| 0F4612 | SENDER OIL PRESSURE 1/8" NPT | 1 | Sensor | Amazon eBay $189.99 |
| 0F5254 | V-BELT 31/64" X 62-3/8" | 1 | Belt | Amazon eBay |
| 0F5419 | ELEMENT AIR FILTER | 1 | Air filter | Amazon eBay $26.99 NAPA $11.24 |
| 0F5463 | HOSE LOWER RAD CPL C5 6.8L | 1 | Hose | Amazon eBay $24.85 |
| 0F6355 | GASKET SEAL PLATE 390 GB | 1 | Gasket | eBay |
| 0F7077 | V-BELT 1/2" X 63-3/8" (6.8L, 100KW & 130KW) | 1 | Belt | Amazon eBay $49.95 |
| 0F9071 | SENSOR OXYGEN | 1 | Sensor | buy |
| 0G0321 | HOSE COOL 5/8" ID 250#WP (14") | 1 | Hose | Amazon eBay |
| 0G0866 | HOSE OIL COOLER PREFORMED 3/4 (150KW 3600RPM) | 1 | Hose | eBay |
| 0G3167 | O-RING 2-3/4 X 3/32 X 2-15/16 | 2 | Seal | Amazon eBay |
| 0H1827 | PROBE COOLANT LEVEL 3/8-18NPTF | 1 | Sensor | Amazon eBay |
| 052624 | BEARING BALL 6212 SEALED | 1 | Service part / kit | Amazon eBay $15.38 |
| 057019 | BALL BRG 65 X 120 X 23 | 2 | Service part / kit | eBay |
| 057019S | BEARING #6213 SEALED | 1 | Service part / kit | eBay |
| 058208 | BATT 12VDC 24F 625 | 1 | Service part / kit | Amazon eBay |
| 058665 | BATTERY 12VDC 90-AH 27F | 1 | Service part / kit | Amazon eBay |
| 090152 | ASSY BRIDGE RECTIFIER | 1 | Service part / kit | eBay |
| 090283 | CAP RADIATOR 13 PSI | 1 | Service part / kit | Amazon eBay $19.99 |
| 0E4392 | ACTUATOR BOSCH 60 GOVERNOR | 1 | Service part / kit | eBay $417.99 |
| 0E7403B | FUSE ATO TYPE 10 AMP (RED) | 2 | Service part / kit | Amazon eBay $29.99 |
| 0E7403C | FUSE ATO TYPE 15 AMP (BLUE) | 1 | Service part / kit | Amazon eBay $79.99 |
| 0F4462 | RAIN CAP 2-1/2" AL | 1 | Service part / kit | Amazon eBay |
| 0G9781 | REG 6.8L 100KW LP CPL EMISS | 1 | Service part / kit | buy |
| 0G9782 | REG 6.8L CPL 100KW N/G EMISS | 1 | Service part / kit | buy |
| 0G9783 | REG 6.8L CPL 130KW N/G EMISS | 1 | Service part / kit | buy |
| 0H0029 | ASSY PCB HSB CTRL IGN MODULE (6.8L G3 100KW N/G & L/P EMISSIONS) | 1 | Service part / kit | buy |
| 0H0260 | EMISS EXH OUTLET PIPE CPL | 1 | Service part / kit | buy |
| 0H2099 | CATALYST 3-WAY | 1 | Service part / kit | buy |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Owner's manual — 167304C (Generac)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.