Craftsman 917.28991 manual To Service Cartridge, Muffler, Spark Plugs

AIR FILTER

Your engine will not run properly using a dirty air filter. Service paper cartridgeevery

two months or every 25 hours of operation, whicheveroccurs first.

Service paper cartridge more often under dusty conditions. Replacethepapercartridgeannually,orafter 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 damaged.

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 dislodge dirt.

4.Clean all air cleaner components of any

accumulated dirt or foreign material. 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 airto remove dirt and stubborn dried gum fibers.

CLEAN AIR INTAKE/COOLING AREAS

To ensure 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	surethe	cooling
shrouds	are reinstalled.
NOTE:	Operating the	engine	with	a blocked

grass screen, dirty or plugged cooling fins, and/or cooling shrouds removed will cause engine damage due to overheating.

MUFFLER

Inspect and replace corroded muffler and spark arrester (if equipped) as it could create 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, ob- structing fuel flowto carburetor, replacement is required.

1.With engine cool, remove filter and plug fuel line sections.

2.Place newfuel filter in position in fuel line with arrow pointing towards carburetor.

3.Be sure there are no fuel line leaks and clamps are properly positioned.

4.Immediatelywipeupanyspilled gasoline.

Clamp -_ Clamp

Fuel Filter

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