Walker H38i - Important Tips for Care of the Kohler Engine; Fuel System; Starting;Stopping; Cooling System

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Maintenance Instructions KOHLER TIPS
IMPORTANT TIPS FOR CARE OF THE KOHLER
ENGINE
Fuel System
● Fuel must be clean  free from water, dirt, and or
ganic material.
● Change fuel lter on a regular basis and when
contamination is suspected or found in the fuel.
● The fuel injection pump module is a sealed unit
and is not serviceable; opening the fuel pump mod
ule will void the warranty. Additionally, the fuel
pump module and the fuel lines between it and the
injectors are pressurized. For service of the pres
surized fuel system including the fuel pump module,
fuel lines, and fuel injectors contact your Walker
dealer or authorized Kohler service dealer.
Starting/Stopping
● Start engine with the throttle advanced off idle
to a midpoint (1/4 to 1/2) throttle setting. This will
aid starting, especially in cold weather.
● Keep the battery fully charged.
● Match crankcase oil viscosity to the ambient tem
perature, allowing the engine to crank faster and
start easier.
● Allow engine to run at idle for a few seconds be
fore stopping engine to avoid runon or backring.
Cooling System
CAUTION
DO NOT use water or a pressure washer to
clean the cooling system on an air-cooled
engine; mud may form under the cooling
shroud on the cylinder head and cooling
fan resulting in engine overheating.
● Keep engine air intake screen and cylinder head
ns free of grass clippings, chaff, and dirt. Inspect
intake screen and cooling ns for cleanliness and no
damage.
● Periodically remove two access panels in the en
gine shroud to inspect and clean cylinder head cool
ing ns.
● Check performance of the cooling system by
starting the engine, holding a hand adjacent to the
cylinder head, and feeling the cooling airow.
DANGER
Make sure to keep hands clear of exhaust
pipe, mufer, and moving parts when
checking airow.
● Operate the engine at full speed when mowing.
This allows the engine to produce full horsepower
and move more cooling air through the engine cool
ing ns.
Air Cleaner System
● Use only Kohler air cleaner elements. Aftermar
ket elements may not seal in the air cleaner housing,
allowing dirt to enter the engine. Also, aftermarket
lters often skimp on the ltration media and require
more frequent replacement (see following instruc
tions).
● DO NOT overservice or frequently “disturb” the
air lter. A dirty air lter actually cleans better than
a new one. Changing and cleaning the air lter too
often can ac tually reduce lter efciency and in
crease the oppor tunity for traces of dust to enter the
engine.
● When the air lter element is removed or re
placed, make sure all dust is cleaned out of the air
cleaner housing. Use a damp cloth and wipe the
interior of the canister clean, including both the in
side and outside surfaces of the outlet tube (a lit tle
dirt left here will be sucked into the engine and re
duce engine life). When the lter is reinstalled,
make sure the element is held tight and straight
in the canister for proper seating and sealing.
Oil
● Use only multiviscosity oils as specied with the
viscosity matching ambient temperatures for the en
gine operating conditions. This will aid starting in
cold weather and assure proper lubrication in hot
weather.
● Use only Kohler oil lters. Aftermarket lters
may not seal properly and/or have the incorrect
pressure relief valve for proper lubrication.