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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:
1.
Will not start
Hard starting
2.
Kicks back when starting
3.
Lack of power
4.
5.
Vibration
Erratic  operation
6.
Overheating
7.
High oil consumption
8.
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:
1.
Loose spark plug
Loose cylinder head bolts
2.
Blown head gasket
3.
4.
Burnt valves and/or seats
5.
Insufficient tappet clearance
6.
Warped cylinder head
44

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