TROUBLESHOOTING
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1C-31
Power Steering
Poor, Erratic or No Assist
Cause Special Information
1. Drive belt 1. Worn, broken or out of adjustment
2. Low fluid level
3. Air in system 3. Air leak in lines, pump, or air from
installation. Refer to SECTION 9A for
bleeding procedure.
4. Leaking hoses 4. Refer to SECTION 9A for bleeding
procedure.
5. Steering cables and/or steering helm 5. Cable or helm partially frozen from
corrosion or rust; cable over-lubricated;
improper cable installation
6. Binding in sterndrive unit 6. Refer to appropriate Mercury
MerCruiser Sterndrive Service Manual
7. Restriction in hydraulic hoses 7. Causes a loss of pressure
8. Control valve not positioned properly,
not balanced properly, or the mounting nut
is loose
9. Mounting bracket adjusting screw
loose or mounting tube is loose
10. Faulty pump 10. Flow control valve may be sticking
11. Worn piston ring or scored housing
bore in cylinder
11. Causes loss of pressure
12. Leaking valve body or loose fitting
spool
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