0B-20 Maintenance and Tune-Up:
Bolts and Nuts Inspection
Z9J0110206025
Inspect bolts and nuts
Initially after 20 hours (1 month) and every 100 hours
(6 months)
Check that all bolts and nuts listed below are tightened
to their specified torque.
Refer to “Tightening Torque Specifications” in Section 0A
(Page 0A-13).
• Cylinder head cover bolts
• Intake manifold bolts and nuts
• Exhaust manifold cover bolts
• Flywheel bolt
• ECM ground bolt
• Power unit mounting bolts
• Clamp bracket shaft nut
• Gearcase bolts
• Propeller nut
Oil Pressure Check
Z9J0110206027
Check the engine oil pressure periodically.
1) Check the engine oil level.
2) Loosen screw and disconnect blue lead wire (1) from
oil pressure switch (2).
Remove the oil pressure switch.
3) Install oil pressure gauge adaptor into oil pressure
switch hole in place of oil pressure switch.
Special tool
(A): 09915–77311 (Oil pressure gauge)
(B): 09915–78211 (Oil pressure gauge
adapter)
4) Start engine and warm up.
Engine warm up (engine speed)
Summer: 5 min. (2 000 r/min.)
Winter: 10 min. (2 000 r/min.)
5) After warming up, shift into forward gear and
increase engine speed to 3 000 r/min, then compare
pressure indicated on gauge to specifications.
NOTE
The figure shown below is a guideline only,
not an absolute service limit.
Oil pressure
400 – 600 kPa (4.0 – 6.0 kg/cm
2
, 57 – 85 psi.)
6) If oil pressure is lower or higher than specification,
the following causes may be considered.
Low oil pressure
• Clogged oil filter
• Leakage from oil passages
• Defective oil pump
• Defective oil pressure regulator
• Damaged O-ring
• Combination of above items
1
2
I9J011020059-01
(A)
(B)
I9J011020060-02
I9J011020033-01
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