Service And Maintenance - Craftsman 247.889210 Operator's Manual

21 self propelled mower

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Operator's manual (64 pages)

Table of Contents

WarninG

Always stop engine, disconnect spark plug wire, and ground against

engine before performing any type of maintenance on your machine.

General reCOMMendatiOnS

•

Always observe safety rules when performing any maintenance.

•

The warranty on this lawn mower does not cover items that have

been subjected to operator abuse or negligence. To receive full

value from warranty, operator must maintain the equipment as

instructed here.

•

Changing of engine-governed speed will void engine warranty.

•

All adjustments should be checked at least once each season.

•

Periodically check all fasteners and make sure these are tight.

enGine MaintenanCe

Checking the Spark Plug

Clean spark plug and reset the electrode gap to 0.030" at least once a

season; replace every 100 hours of operation.

•

Clean area around the spark plug base. Do not sandblast spark

plug. Spark plug should be cleaned by scraping or wire brushing

and washing with a commercial solvent.

•

Remove and inspect the spark plug. Check gap to make sure it is

set at .030". See Figure 12.

•

Replace the spark plug if electrodes are pitted, burned, or the

porcelain is cracked.

Servicing the air Cleaner

The air cleaner prevents damaging dirt, dust, etc., from entering the

carburetor and being forced into the engine and is important to engine

life and performance. The air cleaner consists of a foam element and a

paper element that can be cleaned and reused. Never run the engine

without an air cleaner completely assembled.

CaUtiOn

Never use gasoline or low flash point solvents for cleaning the

element. A fire or explosion could result.

Unfasten the air cleaner case by sliding the two fasteners toward

the recoil starter.

With two hands, pulling the two latches toward you and upward

as shown in Figure 13, separate the air cleaner case from the air

cleaner body.

Foam element

•

Clean foam element after first 8 hours of use, then every 25 hours

of use thereafter. See Figure 14.

•

Wash the element in detergent and water, and dry it thoroughly.

CaUtiOn

Do not oil foam element.

Paper element

•

Clean paper element after first 8 hours of use, then every 100

hours of use thereafter. See Figure 14.

•

Clean the element by tapping gently to remove

replace the element.