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Kohler Command PRO Horizontal Shaft Engine

The Kohler Command PRO Horizontal Shaft is a 2-cylinder air-cooled engine. It powers generator sets from Kohler, including the CH940, CH960 and CH980.

Also known as: Kohler Command PRO Horizontal Shaft

2
Cylinders
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Engine specifications

Cylinders2
Aspirationair-cooled

Common problems

2
  • No start
    Cause: Improper fuel, Dirty air filter, Faulty spark plug, Incorrect fuel
    Fix: Check and clean the air filter, check and replace the spark plug if necessary, ensure correct fuel type is used
  • Engine troubles that appear to be fuel system related
    Cause: Fuel tank is not filled with clean, fresh gasoline; fuel tank cap vent is blocked or not operating properly; shut-off valve (if equipped) is closed; in-line fuel filter (if equipped) is dirty or obstructed; fuel lines and fuel pump are restricted or faulty
    Fix: Check the following areas before adjusting the carburetor: make sure the fuel tank is filled with clean, fresh gasoline; ensure the fuel tank cap vent is not blocked and operating properly; if the fuel tank has a shut-off valve, make sure it is open; if equipped, check that the in-line fuel filter is clean and unobstructed and replace as necessary; verify that fuel is reaching the carburetor by checking for restrictions or faulty components in the fuel lines and fuel pump, and replace as needed

Compiled from service & troubleshooting documentation across every generator set that uses the Kohler Command PRO Horizontal Shaft.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filtercheck daily, replace seasonally or every 150 hours (flat air cleaner), check heavy-duty air filter element seasonally or every 300 hours, replace heavy-duty inner air cleaner element every 25 hours, service precleaner (flat air cleaner) weekly—150 hr
Fuel filterreplace seasonally or every 300 hours25 083 04-S300 hr buy
Oil filterreplace every 200 hours, more frequently under severe conditions62 132 04-S200 hr buy
BatteryWARNING: Explosive Gas! Batteries produce explosive hydrogen gas while being charged. To prevent a fire or explosion, charge batteries only in well ventilated areas.—
Beltsolenoid shift starter disassembled and cleaned every 200 hours, crankshaft splines lubricated every 600 hours—200 hr
Coolantcheck seasonally or every 300 hours, clean cooling areas as necessary—300 hr
Oilhigh quality detergent oil of API service class SJ or higher—150 hr
Spark plugreplace every 200 hours, check condition and gap seasonally or every 300 hours—200 hr

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

Common questions

Which generators use the Kohler Command PRO Horizontal Shaft engine?

The Kohler Command PRO Horizontal Shaft powers 3 generator set(s), including Kohler CH940, Kohler CH960, Kohler CH980.

How often should you change the oil in the Kohler Command PRO Horizontal Shaft?

The Kohler Command PRO Horizontal Shaft oil change interval is every 150 hours.

What is a common problem with the Kohler Command PRO Horizontal Shaft engine?

A commonly reported issue on generators using the Kohler Command PRO Horizontal Shaft is: No start. Cause: Improper fuel, Dirty air filter, Faulty spark plug, Incorrect fuel. Fix: Check and clean the air filter, check and replace the spark plug if necessary, ensure correct fuel type is used.