TROUBLESHOOTING
SERVICE MANUAL NUMBER 28
Oil Foams Out Of Pump Fill/Vent Screw
Cause
Special Instructions
Flush system with clean oil refill pump
and bleed trim system.
Contaminated oil.
Check for cause of low oil level and
correct. Add oil to pump and bleed
system.
Oil level low.
Sterndrive Unit Cannot Be Lowered From UP Position Or Lowers With Jerky
Movements
Cause
Special Instructions
Check for cause of entry. Fill and
bleed trim system.
Air in trim system.
Low oil level.
Add oil.
Test. If shuttle 1 is stuck, replace
pump adaptor. (Refer to SECTION 5A) If
pressure is low, replace adaptor or
attempt to repair by replacing the
Insufficient IN/DOWN pressure or
shuttle valve stuck.
followingD
items:
IN/DOWN pressure relief valve 1
Check for cause of binding. Repair or
replace as necessary.
Trim cylinder(s) binding.
Gimbal housing-to-trim pump hydraulic
hose pinched.
Replace hose 8.
Hoses reversed on one trim cylinder
only.
Reconnect hoses correctly.
Check for cause of binding and
replace.
Drive unit binding in gimbal ring.
Down pressure relief valve (6) has dirt
particles under check ball.
Replace with a new valve kit.
Sterndrive Unit Will Not Stay In Full UP Position For Extended Periods
Cause
Special Instructions
Check for cause and correct. Add oil to
pump and bleed trim system.
External leakage.
Test. (Refer to SECTION 5A) Replace
adaptor 2 or attempt to repair by
replacingD the following:
Pump OUT/UP circuit leaking
internally.
D ThermalPoppet vreliefalve svalveeals 94
Trim cylinder(s) leaking internally and
pump DOWN circuit leaking internally
(both must be faulty to cause this
problem).
Rebuild cylinders 5 Repair or
replace adaptor 2 as required.
INDEX
Page 1C-18
90-863160 MAY 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | MerCruiser Sterndrives 90-863160 |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 3 out of 3)
Marine readers have rated Mercury MerCruiser Bravo Outdrives Sterndrives Marine Engines Service Manual Number 28 3.0 out of 3.0 based on 1 product reviews. I could not find any mention of the seawater pump assembly.
Maybe I have the wrong unit