129
POWERHEAD
TEST PROCEDURES
7
Oil Pressure Test
Check the engine oil level.
Remove side covers. Refer to side cover
Removal and Installation on p. 177.
Loosen screw and disconnect blue lead wire from
oil pressure switch.
Remove the oil pressure switch.
Install Oil Pressure Test Adapter, P/N 350930, and
Pressure Gauge, P/N 5000902, into oil pressure
switch hole.
Connect an engine tachometer.
Start and run outboard until it achieves operating
temperature.
After warm up, shift into forward gear and
increase speed to 3000 RPM. Pressure should
read 28 to 43 psi (200 to 300 kPa) at 3000 RPM.
IMPORTANT: The values shown are guidelines
only, not absolute service limits.
If oil pressure is lower or higher than specification,
consider the following causes:
Low oil pressure
•
Clogged oil filter
• Leakage from oil passages
• Defective oil pump
• Defective oil pressure regulator
• Damaged o-ring
High oil pressure
• Using an engine oil of too high viscosity
• Clogged oil passage
• Clogged oil pressure regulator
After testing, install the oil pressure switch. Refer
to Oil Pressure Switch Service on p. 68.
1. Blue lead wire
2. Oil pressure switch
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