Troubleshooting - Craftsman 917.38721 Owner's Manual

ENGINE
FUEL SYSTEM
iMPORTANT: It is important to prevent
gum deposits from forming in essential fuel
system parts such as carburetor, fuel filter, fuel
hose, or tank during storage Also, experience
indicates that alcohol blended fuels (called
gasohol or using ethanol or methanol) can
attract moisture which leads to separation and
formation of acids during storage. Acidic gas
can damage the fuel system of an engine
while in storage
o Drain the fuel tank.
o Start the engine and let it run until the fuel
lines and carburetor are empty.
o Never use engine or carburetor cleaner
products in the fuel tank or permanent
damage may occur
,, Use fresh fuel next season
NOTE: Fuel stabilizer is an acceptable
alternative in minimizing the formation of fuel
gum deposits during storage. Add stabilizer to
gasoline in fuel tank or storage container,
Always follow the mix ratio found on stabilizer
container, Run engine at least 10 minutes
after adding stabilizer to allow the stabilizer to
reach the carburetor Do not drain the gas
tank and carburetor if using fuel stabilizer,
TROUBLESHOOTING CHART
ENGINE OIL
Drain oil (with engine warm) and replace with
clean engine oil (See "ENGINE" in the
Customer Responsibilities section of this
manual).
CYLINDER
o Remove spark plug
Pour one ounce (29 ml) of oil through spark
plug hole into cylinder,
o Pull starter handle slowly a few times to
distribute oil
o Replace with new spark, plug.
OTHER
', Do not store gasoline from one season to
another.
,, Replace your gasoline can if your can starts
to rest, Rust and/or dirt in your gasoline will
cause problems
• tf possible, store your unit indoors and cover
it to give protection from dust and dirt.
o Cover your unit with a suitable protective
cover that does not retain moisture. Do not
use plastic Plastic cannot breathe which
allows condensation to form and will cause
your unit to rust.
IMPORTANT: Never cover mower while
engine and exhaust areas are still warm
CAUTION: Never store the lawn mower with
gasoline in the tank inside a building where
fumes may reach an open flame or spark.
Allow the engine to cool before storing in any
enclosure.
PROBLEM
Doesnots_
CAUSE
o Dirty air fillet
o Out of fuel,
o Stale fuel
o Water in fuel,
o Spark plug wire is
discennected.
o Bad spark plug.
. Loose blade or broken blade
adapter,
o Control bar in released
position°
o Control bar defective.
CORRECTION
o Clean/replace air fiiter.
o Fill fuel tank.
o Drain tank and refill with
fresh clean fuel.
° Drain fuel tank and
carburetor and refill tank
with fresh gasoline.
o Connect wire to plug.
o Replace spark plug.
• Tighten blade bolt or
replace blade adapter.
= Depress control bar to
handle.
° Replace control bar.
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