AIR FILTER

Your engine will not run properly and may be damaged by using a dirty air filter. Replace the air filter every 100 hours of

operation or every season, whichever oc- curs first. Service air cleaner more often

under dusty conditions.

TO CLEAN AIR FILTER

1.Remove cover.

2.Carefully remove cartridge.

3.Clean by gently tapping on a flat sur-

face. If very dirty, replace cartridge.

ACAUTION: Petroleum solvents, such as kerosene, are not to be used to clean cartridge. They may cause deterioration of the cartridge. Do not oil cartridge. Do not use pressurized air to clean or dry cartridge.

4.Install cartridge, then replace cover.

Tab

Cartridge

Filter

MUFFLER

Inspect and replace corroded muffler as it could create a fire hazard and/or damage.

SPARK PLUG

Replace spark plug 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 the "PRODUCT SPECIFIC-

ATIONS" section of this manual.

CLEANING

IMPORTANT: For best performance, keep mower housing free of built-grass and trash. Clean the underside of your lawn mower after each use.

ACAUTION: Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with plug.

Clean the underside of your mower by scraping to remove build-up of grass/trash.

Clean engine often to keep trash from

accumulating. A clogged engine runs hotter and shortens engine life.

Keep finished surfaces and wheels free of all gasoline, oil, etc.

We do not recommend using a garden hose to clean lawn mower unless the

electrical system, muffler, air filter and carburetor are covered to keep water out. Water in engine can result in short- ened engine life.

CLEAN UNDER DRIVE COVER

Clean under drive cover at least twice a season. Scrape underside of cover with putty knife or similar tool to remove any

build-up of trash or grass on underside of drive cover.

WARNING: To avoid serious injury, before performing any service and adjustments:

1.Release control bar and stop engine.

2.Make sure the blade and all moving parts have completely stopped.

3.Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with plug.

LAWN MOWER

TO ADJUST CUTTING HEIGHT

See "TO ADJUST CUTTING HEIGHT" in the Operation section of this manual.

REAR DEFLECTOR

The rear deflector, attached between the rear wheels of your mower, is provided to

minimize the possibility that objects will be thrown out of the rear of the mower

into the operator mowing position. If the deflector becomes damaged, it should be replaced.

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Craftsman 917.371721 owner manual AIR Filter, Muffler, Spark Plug, Cleaning, Lawn Mower To Adjust Cutting Height