2-7
2
7. While holding the adjuster dial at the proper
clearance setting, tighten the jam nut securely
with the valve adjuster handle.
8. Place the two tappet covers with O-rings into
position. Tighten the cap screws securely.
CF006A
CF005
9. Install the spark plug; then install the timing
inspection plug.
Testing Engine
Compression
To test engine compression, use the following pro-
cedure.
NOTE: The engine must be warm and the battery
must be fully charged for this test.
NOTE: The seats and center console must be
removed for this procedure.
1. Remove the high tension lead from the spark
plug.
2. Using compressed air, blow any debris from
around the spark plug.
3. Remove the spark plug; then attach the high ten-
sion lead to the plug and ground the plug on the
cylinder head well away from the spark plug
hole.
4. Attach the Compression Tester Kit (p/n
0444-213).
5. While holding the throttle in the full-open posi-
tion, crank the engine over with the electric
starter until the gauge shows a peak reading
(five to 10 compression strokes).
NOTE: The compression should be within a
range of 63-77 psi in the full-open throttle position.
6. If compression is abnormally low, inspect the
following items.
A. Starter cranks engine over.
B. Gauge is functioning properly.
C. Throttle lever in the full-open position.
D. Valve/tappet clearance correct.
E. Valve bent or burned.
F. Valve seat burned.
NOTE: To service valves, see Section 3.
7. Pour 29.5 ml (1 fl oz) of oil into the spark plug
hole, reattach the gauge, and retest compression.
8. If compression is now evident, service the piston
rings (see Section 3).
Spark Plug
A light brown insulator indicates that the plug is
correct. A white or dark insulator indicates that the
engine may need to be serviced or the carburetor
may need to be adjusted. To maintain a hot, strong
spark, keep the plug free of carbon.
! WARNING
Always wear safety glasses when using compressed
air.
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