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Kohler KG10V08T-6DGS Engine

The Kohler KG10V08T-6DGS is a 10.3 L 8-cylinder turbocharged and aftercooled engine rated at 1800 rpm, producing up to 245 kW. It powers generator sets from Kohler, including the KG200.

Also known as: Kohler KG10V08T-6DGS

Part of the Kohler KG10V08T engine family — 2 variants share parts & fitment.

10.3 L

Displacement

Cylinders

1800 rpm

Rated speed

245 kW

Gross power

On this pageSpecs Generator sets FAQ Service intervals Torque & specs Procedures

Engine specifications

Displacement	10.3 L
Cylinders	8
Aspiration	Turbocharged and Aftercooled
Rated speed	1800 rpm
Gross power	245 kW

Generator sets powered by this engine

Kohler KG200

How to read your Kohler engine serial & model number →

Troubleshooting

Symptoms & remedies

Symptom	Cause	Remedy
Will Not Start	No fuel	Check fuel supply.
Will Not Start	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Will Not Start	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Will Not Start	Incorrect oil level	Check engine oil level; add as needed.
Will Not Start	Engine overloaded	Disconnect or reduce loads.
Will Not Start	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Will Not Start	Dirty/restricted air cleaner element	Clean or replace.
Will Not Start	Exhaust restricted	Check for exhaust obstructions.
Hard Starting	No fuel	Check fuel supply.
Hard Starting	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Hard Starting	Restricted fuel flow	Make sure fuel supply valves are open; check for air intake system leakage.
Hard Starting	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Hard Starting	Incorrect oil level	Check engine oil level; add as needed.
Hard Starting	Engine overloaded	Disconnect or reduce loads.
Hard Starting	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Hard Starting	Dirty/restricted air cleaner element	Clean or replace.
Hard Starting	Exhaust restricted	Check for exhaust obstructions.
Stops Suddenly	No fuel	Check fuel supply.
Stops Suddenly	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Stops Suddenly	Incorrect oil level	Check engine oil level; add as needed.
Stops Suddenly	Engine overloaded	Disconnect or reduce loads.
Stops Suddenly	Dirty/restricted air cleaner element	Clean or replace.
Stops Suddenly	Exhaust restricted	Check for exhaust obstructions.
Lacks Power	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Lacks Power	Low fuel pressure	Check and adjust fuel pressure.
Lacks Power	Incorrect oil level	Check engine oil level; add as needed.
Lacks Power	Engine overloaded	Disconnect or reduce loads.
Lacks Power	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Lacks Power	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Lacks Power	Air induction system leak	Inspect air induction system.
Lacks Power	Damaged turbocharger (If applicable)	Inspect turbocharger compressor and turbine blades for damage and/or contact against housing.
Operates Erratically or Unevenly	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Operates Erratically or Unevenly	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Operates Erratically or Unevenly	Low fuel supply pressure	Check and adjust.
Operates Erratically or Unevenly	Engine overloaded	Disconnect or reduce loads.
Operates Erratically or Unevenly	Loose wiring at shut-off valve(s)	Check wiring and repair connections.
Operates Erratically or Unevenly	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Operates Erratically or Unevenly	Dirty air filter	Inspect and replace as needed.
Knocks or Pings	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Knocks or Pings	Engine overloaded	Disconnect or reduce loads.
Knocks or Pings	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Knocks or Pings	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Knocks or Pings	Dirty air filter	Inspect and replace as needed.
Knocks or Pings	Boost pressure too high (if applicable)	Check for stuck wastegate, check for leak in wastegate boost line (if applicable).
Knocks or Pings	Excessive intake manifold temperature	Check charge air cooler for debris and clean as needed (if applicable).
Skips or Misfires	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Skips or Misfires	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Skips or Misfires	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Skips or Misfires	Dirty air filter	Inspect and replace as needed.
Backfires	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Backfires	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Backfires	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Backfires	Dirty air filter	Inspect and replace as needed.
Overheats	Incorrect fuel	Make sure fuel system is configured properly for LPG or NG supply.
Overheats	Dirty/restricted fuel system	Check fuel system and clean components as needed.
Overheats	Incorrect oil level	Check engine oil level; add as needed.
Overheats	Engine overloaded	Disconnect or reduce loads.
Overheats	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Overheats	Faulty engine coolant temperature sender	Inspect the engine coolant temperature sender and wires and replace or repair as needed.
Consumes Excess Fuel	Faulty spark plug, wire, or ignition coil	Inspect, adjust, or replace as needed.
Consumes Excess Fuel	Dirty/restricted air cleaner element	Clean or replace.
Consumes Excess Fuel	Incorrect fuel pressure	Check and adjust fuel pressure.
ECM Does Not Store DTC	Faulty electrical connections, components, or wiring	Contact an authorized Kohler distributor/dealer.
Erratic operation	Air induction system leak	Inspect air induction system.

Fault codes and symptom→remedy steps extracted from this engine’s service/owner documentation; verify against the official manual before servicing.

Service intervals

Item	Action	Hours	Months	Notes
Wire-cable insulation breakdown	Test	500 hr	36 mo	Three Years or 500 Hrs; Visually Inspect and Test
APM603 RTC battery	Replace		24 mo	Two Years, when indicated by the controller (range 2-10 years)
Air ducts, louvers	Clean		12 mo	Yearly; Check and Clean
Battery charger operation, charge rate	Inspect		1 mo	Monthly
Battery electrolyte level	Check		1 mo	Monthly
Battery load testing	Test		12 mo	Yearly
Battery specific gravity, charge state	Test		1 mo	Monthly
Circuit breakers, fuses	Inspect		1 mo	Monthly; Visually Inspect, Check, Replace as necessary, Clean, Test; do not break manufacturer's seals or internally inspect
Coolant temperature protection level	Test		6 mo	Six Months; follow engine manufacturer's manual
Crankcase breather	Clean		3 mo	Quarterly; follow engine manufacturer's manual
Excessive back pressure	Test		12 mo	Yearly
Fan and alternator belts	Inspect		1 mo	Monthly; follow engine manufacturer's manual, Replace as necessary
Flexible connector(s)	Inspect		6 mo	Six Months; Visually Inspect
Fuel piping	Inspect		12 mo	Yearly; Visually Inspect
Hangers and supports	Inspect		12 mo	Yearly; Visually Inspect
Insulation, fire hazards	Inspect		3 mo	Quarterly; Visually Inspect
Louver motors and controls	Test		12 mo	Yearly; Visually Inspect, Clean, Test
Radiator exterior	Clean		12 mo	Yearly; Check and Clean
Recharge after engine start	Check		1 mo	Monthly
Remote control	Test		1 mo	Monthly
Remove corrosion, clean and dry battery and rack	Inspect		1 mo	Monthly; Visually Inspect and Clean
Run generator set	Test		1 mo	Monthly
Safety and alarm operation	Test		6 mo	Six Months; Check and Test
Tighten DC electrical connections	Check		6 mo	Six Months
Tighten control and power wiring connections	Check		12 mo	Yearly
Water supply to the heat exchanger	Check		12 mo	Yearly
Wire abrasions where subject to motion	Inspect		3 mo	Quarterly; Visually Inspect and Check

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
Other	Alternator end bracket bearing replacement interval	10000	hours	more frequently if annual inspection shows excessive rotor end play or bearing damage
Other	Battery specific gravity - charge threshold	1.215		at 26.7°C (80°F), charge battery if below this
Other	Battery specific gravity - fully charged	1.260		at 26.7°C (80°F)
Other	Battery specific gravity max cell-to-cell variance	0.01
Other	Gaseous fuel system leak test pressure	6-8	oz per sq in (10-14 in water column)
Temperature	Battery specific gravity reference temperature	26.7	°C (80°F)
Temperature	Battery specific gravity temperature correction factor	0.004	specific gravity points per 5.5°C (10°F)

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

Procedures

Battery Specific Gravity Check diagnostic

Tools: Battery hydrometer

Use a battery hydrometer to check specific gravity of electrolyte in each cell (filler-cap batteries only).
Hold the hydrometer vertically and read the value.
Correct the reading using the temperature correction table if the hydrometer lacks one.
Battery is fully charged if corrected specific gravity is 1.260 at 26.7°C (80°F).
Charge the battery if specific gravity is below 1.215 at 26.7°C (80°F).
Maintain specific gravity within ±0.01 between cells.

Air Filter Element Replacement maintenance

⚠ Do not operate the generator set with the air cleaner removed.

Remove the generator set from service (remove load, shut down, controller Out-of-Service mode, press emergency stop).
Disconnect power to battery charger.
Remove battery cables, negative lead first.
Loosen the filter clamp and remove the filter element from the air intake elbow.
Install new/cleaned filter element and tighten the filter clamp.

Battery Electrolyte Level Inspection maintenance

⚠ Battery acid can cause blindness and burn skin; wear splashproof goggles, rubber gloves, boots.

Check the electrolyte level at the specified interval on batteries with filler caps.
Remove the filler caps and verify electrolyte reaches the bottom of each filler hole.
Refill as necessary with distilled water only (do not add fresh electrolyte).
Tighten the filler caps.
If water was added during freezing temperatures, run the generator set 20-30 minutes to mix electrolyte and water.

Procedure to Drain Cooling System maintenance

⚠ Hot coolant and steam can cause severe injury or death.

Stop the generator set and allow it to cool.
Deenergize the block heater, if equipped.
Cover the pressure cap with a rag and remove it to prevent air pockets.
Open the radiator and/or engine block coolant drain valve(s) and allow the system to drain.
If mineral deposits or dirt/grease are present, proceed to flush and clean; otherwise proceed to refill.

Procedure to Refill Cooling System maintenance

⚠ Do not add coolant to a hot engine; wait until the engine has cooled.

Cover the pressure cap with a rag and remove it.
Close drain valve(s) and tighten hose clamps.
Fill the cooling system with the recommended Kohler coolant mixture, from the bottom if possible.
Replace the pressure cap.
Operate the generator set until the thermostat opens (upper hose warms).
Stop the engine, allow it to cool, check and repair any leaks.
Remove pressure cap and add coolant to just below the overflow tube opening.
Replace the pressure cap.
Check coolant level in the sight glass; maintain between high and low marks.
Reenergize the block heater, if equipped.

Radiator Maintenance maintenance

⚠ Avoid damaging fins with rough brushing or excessive jet pressure.

Periodically check for leakage from core or tank connections.
Inspect liquid level via the top tank sight glass at regular intervals.
Test antifreeze before cold weather periods.
For long standby periods, check top tank interior for scale/rust every 1-3 months.
Remove dirt/debris from core face with compressed air, steam, or water (stand back at least 0.9 m/3 ft if using water, keep stream parallel to fins).
Clean fan blades once per year using a stiff brush or air nozzle, or nonflammable solvent with brush for solid deposits.

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 displacement of the Kohler KG10V08T-6DGS?

The Kohler KG10V08T-6DGS has a displacement of 10.3 liters with 8 cylinders.

Which generators use the Kohler KG10V08T-6DGS engine?

The Kohler KG10V08T-6DGS powers 1 generator set(s), including Kohler KG200.