5.2
Section 5
Fuel System and Governor
Fuel Type
For best results use only clean, fresh, unleaded
gasoline with a pump sticker octane rating of 87
(R+M)/2 or higher. In countries using the Research
Octane Number (RON), it should be 90 octane
minimum. Leaded gasoline is not recommended and
must not be used on EFI engines or on other models
where exhaust emissions are regulated.
Gasoline/Alcohol blends
Gasohol (up to 10% ethyl alcohol, 90% unleaded
gasoline by volume) is approved as a fuel for Kohler
engines. Other gasoline/alcohol blends including E20
and E85 are not to be used and not approved. Any
failures resulting from use of these fuels will not be
warranted.
Gasoline/Ether blends
Methyl Tertiary Butyl Ether (MTBE) and unleaded
gasoline blends (up to a maximum of 15% MTBE by
volume) are approved as a fuel for Kohler engines.
Other gasoline/ether blends are not approved.
Fuel Line
These engines use low permeation rated fuel lines,
certifi ed to comply with California and U.S. EPA
evaporative emission requirements. Fuel lines that do
not meet these requirements may not be used. Order
replacement hose through a Kohler Service Center.
Fuel Filters
Fuel Tank Filter (If Equipped)
A serviceable fuel tank fi lter is located under the fuel
tank cap, in the fi ller neck.
Daily or as required clean fi lter of any accumulation
as follows:
1. Remove the fuel tank cap and fi lter. See Figure
5-2.
Figure 5-2. Fuel Tank Fuel Filter.
2. Clean the fi lter with solvent, replace if damaged.
3. Wipe the fi lter and insert it.
4. Tighten the tank cap securely.
Fuel Filter (If Equipped)
Most engines are equipped with an in-line fi lter.
Periodically inspect the fi lter and replace annually
or every 300 hours with a genuine Kohler fi lter. See
Figure 5-3.
In-Line
Fuel Filter
Fuel Tank
Figure 5-3. In-Line Fuel Filter.
Fuel Valve
These engines are equipped with a fuel valve and
integral screen fi lter located at the inlet of the
carburetor. It controls and fi lters fuel fl ow from the
tank to the carburetor.
Fuel Tank
Cap
(Non
Evaporative
Shown)
Fuel Tank
Filler Neck
Fuel Tank
Filter
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