Maintenance and Tune-Up: 0B-21
High oil pressure
• Using an engine oil of too high viscosity
• Clogged oil passage
• Clogged oil pressure regulator
• Combination of above items
7) After testing, reinstall the plug for oil pressure
service port.
Cylinder Compression Pressure Check
ZAJ6110206019
The compression pressure reading of cylinder is good
indicator of its internal condition.
The decision to overhaul the power unit is often based
on the results of a compression test.
Periodic maintenance records kept at your dealership
should include compression readings for each
maintenance service.
1) Start engine and allow to warm up, then shut engine
off.
2) Disconnect all fuel injector connectors at fuel
injector.
3) Disconnect all ignition coil connectors.
4) Remove the bolts securing the ignition coil, then
remove all ignition coils and spark plugs.
5) Install compression gauge attachment into spark
plug hole, then connect compression gauge
attachment to compression gauge.
Special tool
(A): 09915–64512 (Compression gauge)
(B): 09915–69910 (Compression gauge
attachment)
6) Disconnect remote control throttle cable from throttle
lever.
7) Move and hold throttle lever (1) in full-open position.
8) While cranking engine with starter motor, note
maximum compression pressure reading on gauge
for each cylinder.
NOTE
Figures shown are guidelines only, not
absolute service limits.
Cylinder compression pressure
Standard: 1 200 – 1 800 kPa (12 – 18 kgf/cm
2
, 171
– 256 psi.)
Cylinder compression pressure max. difference
between cylinders
100 kPa (1.0 kgf/cm
2
, 14 psi.)
Low compression pressure can indicate one or more
of following:
• Excessively worn cylinder wall
• Worn piston or piston rings
• Stuck piston rings
• Poor seating of valves
• Ruptured or otherwise damaged cylinder head
gasket
9) Reinstall parts removed earlier (spark plugs, ignition
coils, etc.).
(A)
(B)
I9J011020061-01
IAJ611020044-01
1
IAJ611020045-01
Summary of Contents for GF60A
Page 1: ...9 9 5 0 0 8 8 L 0 0 0 1 E ...
Page 8: ...00 3 Precautions ...
Page 48: ...0B 22 Maintenance and Tune Up ...
Page 236: ...1K 9 Charging System ...
Page 292: ...2B 27 Power Trim and Tilt ...
Page 336: ...K10 ...