Spark Plugs - Craftsman 917.28745 Operator's Manual

AIR FILTER
Your engine will not run properly using
a dirty air filter. Service paper cartridge
every two months or every 25 hours of
operation, whichever occurs first.
Service paper cartridge more often under
dusty conditions.
Replace the paper cartridge annually, or
after every 100 hours of operation.
TO SERVICE CARTRIDGE
Replace a dirty, bent, or damaged car-
tridge. Handle new cartridge carefully;
do not use if the rubber seal is dam-
aged.
NOTE: Do not wash the paper cartridge
or use pressurized air, as this will damage
the cartridge.
1. Open door (A) on the blower housing
to access the air cleaner element (B).
2. Unhook the latch (C) and remove the
element.
3. Gently tap the paper element to dis-
lodge dirt.
4. Clean all air cleaner components of
any accumulated dirt or foreign mate-
rial. Prevent any dirt from entering the
throat of carburetor.
5. Install cleaned or new element on the
base and secure with latch.
6. Close and latch the door.
CLEAN AIR SCREEN
Air screen must be kept free of dirt and
chaff to prevent engine damage from
overheating. Clean with a wire brush or
compressed air to remove dirt and stub-
born dried gum fibers.
CLEAN AIR INTAKE/COOLING AREAS
To insure proper cooling, make sure the
grass screen, cooling fins, and other exter-
nal surfaces of the engine are kept clean at
all times.
Every 100 hours of operation (more often
under extremely dusty, dirty conditions),
remove the blower housing and other
cooling shrouds. Clean the cooling fins and
external surfaces as necessary. Make sure
the cooling shrouds are reinstalled.
NOTE: Operating the engine with a
blocked grass screen, dirty or plugged
cooling fins, and/or cooling shrouds re-
moved will cause engine damage due to
overheating.
MUFFLER
Inspect and replace corroded muffler and
spark arrester (if equipped) as it could cre-
ate a fire hazard and/or damage.
SPARK PLUG(S)
Replace spark plug(s) at the beginning of
each mowing season or after every 100
hours of operation, whichever occurs first.
Spark plug type and gap setting are shown
in "PRODUCT SPECIFICATIONS" section
of this manual.
IN-LINE FUEL FILTER
The fuel filter should be replaced once
each season. If fuel filter becomes
clogged, obstructing fuel flow to carburetor,
replacement is required.
1. With engine cool, remove filter and plug
fuel line sections.
2. Place new fuel filter in position in fuel
line with arrow pointing towards carbu-
retor.
3. Be sure there are no fuel line leaks and
clamps are properly positioned.
4. Immediately wipe up any spilled gaso-
line.
Clamp
Fuel Filter
22