MAINTENANCE
2.15
COMPRESSION TEST
NOTE: 4-Stroke engines are equipped with an
automatic decompressor. Compression readings will
vary in proportion to cranking speed during the test.
Average compression (measured) is about 50-90 psi
during a compression test.
Smooth idle generally indicates good compression.
Low engine compression is rarely a factor in running
condition problems above idle speed. Abnormally
high compression can be caused by a decompressor
malfunction, or worn or damaged exhaust cam lobes.
Inspect camshaft and automatic decompression
mechanism if compression is abnormally high.
A cylinder leakage test is the best indication of engine
condition on models with automatic decompression.
Follow manufacturer’s instructions to perform a
cylinder leakage test. (Never use high pressure
leakage tester as crankshaft seals may dislodge and
leak).
Cylinder Compression
Standard 50-90 PSI
Cylinder Leakage
Service Limit 10 %
(Inspect for cause if leakage exceeds 10%)
ENGINE MOUNTS
Inspect rubber engine mounts (A) for cracks or
damage. Check engine fasteners and ensure they
are tight.
A
A
A
BATTERY MAINTENANCE
WARNING
Battery electrolyte is poisonous. It contains
sulfuric acid. Serious burns can result from
contact with skin, eyes or clothing. Anti-
dote:
External: Flush with water.
Internal: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten
egg, or vegetable oil. Call physician im-
mediately.
Eyes: Flush with water for 15 minutes and
get prompt medical attention.
Batteries produce explosive gases. Keep
sparks, flame, cigarettes, etc. away. Venti-
late when charging or using in an enclosed
space. Always shield eyes when working
near batteries. KEEP OUT OF REACH OF
CHILDREN.
NOTE: New Batteries:
Batteries must be fully
charged before useor batterylife will be reduced
by 10-30%of full potential. Charge battery for 3--5
hours at a current equivalent of 1/10 of the
battery’s rated amp/hour capacity. Do not usethe
alternatorto charge a new battery. (Refer to Battery
Activation and Maintenance video PN 9917987)
The battery is located under the left rear fender.
Inspect the battery fluid level. When the electrolyte
nears the lower level, remove the battery and add
distilled water only to the upper level line. (Ill.1)
Maintain
between upper
and lower level
marks
Ill. 1
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