TROUBLESHOOTING
SERVICE MANUAL NUMBER 28
90-863160 MAY 2000 Page 1C-19
Sterndrive Will Not Stay In The Trimmed OUT/UP Position When Underway
Cause Special Instructions
Air in trim system.
Check for cause of entry. Fill and bleed
system.
Leaky poppet valve. Install repair kit for poppet valve 1.
Sterndrive Unit Trails OUT/UP On Deceleration Or When Shifting Into Reverse
UNIT THUMPS WHEN SHIFTING
Cause Special Instructions
Trim cylinders(s) leaking internally.
Test. (Refer to SECTION 5A) Rebuild or
replace cylinders as necessary.
Trim pump IN/DOWN circuit leaking
internally.
Test. (Refer to SECTION 5A) Replace
adaptor or attempt to repair by
replacing the following:
D Pilot check valves or seals 9
D Install trim pump rebuild kit
Oil Foams Out Of Pump Fill/Vent Screw
Cause Special Instructions
Contaminated oil.
Flush system with clean oil refill pump
and bleed trim system.
Oil level low.
Check for cause of low oil level and
correct. Add oil to pump and bleed
system.
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