Mercury Optimax 175 User Manual

5
B
POWER TRIM
90-855347R1 JANUARY 1999 Page 5B-1
MID-SECTION
Section 5B – Power Trim
Table of Contents
Power Trim Specifications 5B-1. . . . . . . . . . . . . . . . . . . . .
Special Tools 5B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Trim Components 5B-4. . . . . . . . . . . . . . . . . . . . . .
Power Trim Motor 5B-6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Trim - General Information 5B-7. . . . . . . . . . . . . .
Description 5B-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trimming Characteristics 5B-7. . . . . . . . . . . . . . . . . . .
Trailering Outboard 5B-8. . . . . . . . . . . . . . . . . . . . . . . .
Tilting Outboard Manually 5B-8. . . . . . . . . . . . . . . . . .
Trim “In” Angle Adjustment 5B-9. . . . . . . . . . . . . . . . .
Striker Plate Replacement 5B-9. . . . . . . . . . . . . . . . . .
Anode Plate 5B-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Indicator Gauge 5B-10. . . . . . . . . . . . . . . . . . . . .
Check, Fill and Purge - Power Trim System 5B-10. .
Troubleshooting 5B-12. . . . . . . . . . . . . . . . . . . . . . . . . .
Power Trim System with Relays and 2 Wire
Trim Motor 5B-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical System Troubleshooting 5B-15. . . . . . . . . . . . .
General Checks 5B-15. . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the “Down Circuit” 5B-15. . . . . . . . . . . .
Troubleshooting the “Up” Circuit 5B-16. . . . . . . . . . . . . . .
Troubleshooting the “Down” and “Up” Circuits
(All Circuits Inoperative) 5B-17. . . . . . . . . . . . . . . . . . . . . .
Power Trim Assembly Removal and Installation 5B-18.
Removal 5B-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5B-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Power Trim System With Test
Gauge Kit (91-52915A6) 5B-23. . . . . . . . . . . . . . . . . .
“UP” Pressure Check 5B-23. . . . . . . . . . . . . . . . . . . . .
“DOWN” Pressure Check 5B-26. . . . . . . . . . . . . . . . . .
Hydraulic Repair 5B-28. . . . . . . . . . . . . . . . . . . . . . . . .
Trim Rod End Cap Seal 5B-29. . . . . . . . . . . . . . . . . . .
Tilt Ram 5B-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 5B-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scraper Seal Replacement 5B-34. . . . . . . . . . . . . . . .
Motor and Electrical Tests/Repair 5B-38. . . . . . . . . . . . . .
Trim Pump Motor Test 5B-38. . . . . . . . . . . . . . . . . . . .
Motor Disassembly 5B-38. . . . . . . . . . . . . . . . . . . . . . .
Armature Tests 5B-39. . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Repair 5B-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 5B-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly - Motor and Pump 5B-46. . . . . . . . . . . .
Priming Power Trim System 5B-47. . . . . . . . . . . . . . .
Trim Sender Test 5B-47. . . . . . . . . . . . . . . . . . . . . . . . .
Trim Indicator Gauge Needle Adjustment 5B-48. . . .
Trim Indicator Wiring Diagrams 5B-49. . . . . . . . . . . . . . .
Power Trim Specifications
NOTE: Maximum acceptable amount of leak down in 24 hours is 2 inches (50.8 mm).
Test Reading
Trim “UP” 1300 PSI (91kg/cm
2
)
Maximum Pressure
Trim “DOWN” 500 PSI (35kg/cm
2
)
Minimum Pressure

Mercury Optimax 175 Specifications

General

Brand	Mercury
Model	Optimax 175
Category	Outboard Motor
Language	English