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1.5
Section 1
Safety and General Information
1
¹Perform these maintenance procedures more frequently under extremely dusty, dirty conditions.
²Only required for Denso starters. Not necessary on Delco starters. Have a Kohler Engine Service Dealer perform this service.
³Cleanout Kits 25 755 20-S (black) or 25 755 21-S (gold) allow cooling areas to be cleaned without removing shrouds.
Storage
If the engine will be out of service for two months or
more, use the following storage procedure:
1. Clean the exterior surfaces of the engine. On
Electronic Fuel Injected (EFI) engines, avoid
spraying water at the wiring harness or any of
the electrical components.
2. Change the oil and oil filter while the engine is
still warm from operation. See “Change Oil and
Oil Filter” in Section 6.
3. The fuel system must be completely emptied, or
the gasoline must be treated with a stabilizer to
prevent deterioration. If you choose to use a
stabilizer, follow the manufacturer’s
recommendations, and add the correct amount
for the capacity of the fuel system.
Fill the fuel tank with clean, fresh gasoline. Run
the engine for 2 to 3 minutes to get stabilized fuel
into the rest of the system. Close the fuel shut-off
valve when the unit is being stored or
transported.
To empty the system, run the engine until the
tank and the system is empty.
4. Remove the spark plugs and add one tablespoon
of engine oil into each spark plug hole. Install the
spark plugs, but do not connect the plug leads.
Crank the engine two or three revolutions.
5. On equipment with an EFI engine, disconnect the
battery or use a battery minder to keep the
battery charged during storage.
6. Store the engine in a clean, dry place.
Periodic Maintenance Instructions
WARNING: Accidental Starts!
Disabling engine. Accidental starting can cause severe injury or death. Before working on the engine or equipment,
disable the engine as follows: 1) Disconnect the spark plug lead(s). 2) Disconnect negative (-) battery cable from battery.
Maintenance Schedule
These required maintenance procedures should be performed at the frequency stated in the table. They should
also be included as part of any seasonal tune-up.
• Replace fuel filter
1
(EFI engines). Section 5B
Daily or Before
Starting Engine
Maintenance RequiredFrequency
• Fill fuel tank. Section 5
• Check oil level. Section 6
• Check air cleaner for dirty
1
, loose, or damaged parts. Section 4
• Check air intake and cooling areas, clean as necessary
1
. Section 4
• Service precleaner element
1
. Section 4
Every 25 Hours
• Replace air cleaner element
1
. Section 4
• Change oil. (More frequently under severe conditions.) Section 6
• Remove cooling shrouds and clean cooling areas
1,3
. Section 4
• Check oil cooler fins, clean as necessary (if equipped). Section 6
• Check spark plug condition and gap. Section 8
• Change oil filter. Section 6
• Check fuel filter (carbureted models) Section 5
Annually or
Every 500 Hours
• Have bendix starter drive serviced
2
. Section 8
• Have solenoid shift starter disassembled and cleaned
2
. Section 8
Every 100 Hours
Every 200 Hours
Every 1500 Hours
• Have crankshaft splines lubricated
2
. Section 2
Every 500 Hours
Every 250 Hours
• Replace heavy-duty air cleaner element and check inner element
1
. Section 4
Refer to: