Maintenance & Teardown Instructions.

5.2.2.1

5.2.2.1.1 C h e c k - U p .

Most complaints concerning engine operation can be classified as one or a

combination of the following:

Will not start

Hard starting

Kicks back when starting

Lack of power

Vibration

Erratic operation

Overheating

High oil consumption

When the cause of malfunction is not readily apparent, perform a check-

up of the Compression, Ignition, and Carburetion System. This check-up

performed in a systematic manner can usually be done in a matter of min-

utes. It is the quickest, surest method of determining cause of failure

and will point up possible cause of future failures, which can be corrected

at the time. The basic check-up procedure is the same for all engine

models, while any variation by model will be shown under the subject

heading.

NOTE: WHAT APPEARS TO BE AN ENGINE MALFUNCTION MAY BE A

FAULT OF THE POWERED EQUIPMENT RATHER THAN THE ENGINE.

IF EQUIPMENT IS SUSPECT

Check Compression.

5.2.2.l.2

Spin the flywheel against compression. It should rebound sharply.

NOTE: IF ENGINE IS EQUIPPED WITH "EASY-SPIN" STARTING SYSTEM,

S P I N FLYWHEEL IN REVERSE ROTATION (COUNTERCLOCKWISE) TO

OBTAIN ACCURATE COMPRESSION CHECK.

If compression is poor, look for:

Loose spark plug

Loose cylinder head bolts

Blown head gasket

Burnt valves and/or seats

Insufficient tappet clearance

Warped cylinder head