V 4.0
Engine for 20 in. 4-in-1 Self-Propelled Lawn Mower
8925521
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2. If possible, avoid storage areas with high humidity, as this promotes rust
and corrosion.
3. Keep the engine level in storage. Tilting can cause fuel or oil leakage.
4. Cover the engine once the engine and exhaust system are cool. Some
materials can ignite or melt if the engine and/or exhaust system is hot. Do
not use sheet plastic as a dust cover.
a. Use a cover made from a breathable fabric to prevent rust and
corrosion.
5. Store with gasoline that does not contain ethanol or a similar alcohol-
based fuel additive. Fuel with alcohol-based additives may phase separate
into gasoline, alcohol and water when stored for more than a few weeks.
FUEL
IMPORTANT! Avoid fuel phase separation by using premium quality fuel of at
least 89 octane.
Gasoline with ethanol or alcohol-based additives may phase separate and
deteriorate in storage. Phase separated gasoline will cause hard starting and
leave gum deposits that clog the fuel system. Phase separated fuel will contain
water that will prevent the engine from working and may damage the engine
systems. You may need to service or replace the carburetor and other fuel
system components if that gasoline in your engine deteriorates during storage.
The length of time that gasoline can be left in your fuel tank and carburetor
without causing functional problems will vary with factors such as gasoline
blend, storage temperatures and the amount of fuel in the tank. The air in a
partially filled fuel tank will promote fuel deterioration, as will warm storage
temperatures. Fuel problems may occur in a few months or sooner if the
gasoline was not fresh when the tank was filled.
Adding a gasoline stabilizer that is formulated for this purpose can extend fuel
storage life. Deterioration problems can also be avoided by draining the fuel
tank and carburetor prior to storage.
ADDING A GASOLINE STABILIZER
1. Fill the fuel tank with fresh gasoline.
2. Add gasoline stabilizer. Ensure that the instructions for that product are
followed.