Mercury 225 EFI, Service Manual

Page: 427 / 719

5
B
POWER TRIM - DESIGN II
90-884294 OCTOBER 2001 Page 5B-1
MID-SECTION
Section 5B – Power Trim - (Oildyne)
Table of Contents
Power Trim Specifications 5B-1 . . . . . . . . . . . . . . . .
Special Tools 5B-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Trim Components (Oildyne) 5B-4 . . . . . . . .
Power Trim Motor (Oildyne) 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 . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Circuit 5B-12 . . . . . . . . . . . . . . . . . . . . . . . . . .
Tilt Circuit 5B-14 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Down Circuit 5B-16 . . . . . . . . . . . . . . . . . . . . . . . . .
Trail Over and Shock Absorber 5B-19 . . . . . . . . .
Manual Tilt 5B-21 . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 5B-22 . . . . . . . . . . . . . . . . . . . . . .
Power Trim System with Relays and
2 Wire Trim Motor
5B-24 . . . . . . . . . . . . . . . . . . . .
Electrical System Troubleshooting 5B-25 . . . . . . . . .
General Checks 5B-25 . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the “Down Circuit” 5B-25 . . . . . . . .
Troubleshooting the “Up” Circuit 5B-26 . . . . . . . . . . .
Troubleshooting the “Down” and “Up” Circuits
(All Circuits Inoperative)
5B-27 . . . . . . . . . . . . . . . . . .
Power Trim Assembly Removal
and Installation
5B-28 . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 5B-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5B-31 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Power Trim System With
Test Gauge Kit (91-52915A6)
5B-33 . . . . . . . . . .
“UP” Pressure Check 5B-33 . . . . . . . . . . . . . . . . .
“DOWN” Pressure Check 5B-36 . . . . . . . . . . . . . .
Hydraulic Repair 5B-38 . . . . . . . . . . . . . . . . . . . . .
Trim Rod End Cap Seal 5B-39 . . . . . . . . . . . . . . .
Tilt Ram 5B-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 5B-42 . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Piston Removal 5B-44 . . . . . . . . . . . . . .
Cleaning/Inspection/Repair 5B-45 . . . . . . . . . . . . . . .
Scraper Seal Replacement 5B-45 . . . . . . . . . . . .
Power Trim Disassembly 5B-49 . . . . . . . . . . . . . . . . .
Trim Motor Removal 5B-50 . . . . . . . . . . . . . . . . . .
Pump and Component Removal 5B-51 . . . . . . . .
Motor and Electrical Tests/Repair 5B-53 . . . . . . . . . .
Trim Pump Motor Test 5B-53 . . . . . . . . . . . . . . . .
Motor Disassembly 5B-53 . . . . . . . . . . . . . . . . . . .
Armature Tests 5B-54 . . . . . . . . . . . . . . . . . . . . . . .
Motor Repair 5B-55 . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 5B-58 . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly - Motor and Pump 5B-60 . . . . . . . .
Priming Power Trim System 5B-62 . . . . . . . . . . .
Analog Trim Sender Test 5B-62 . . . . . . . . . . . . . .
Trim Indicator Gauge Needle Adjustment 5B-63
Digital Trim Sender 5B-63 . . . . . . . . . . . . . . . . . . .
Troubleshooting Digital Trim Sender 5B-64 . . . .
Trim Indicator Wiring Diagrams 5B-65 . . . . . . . . . . .
Power Trim Specifications
POWER TRIM (Oildyne)
Trim ”UP”
Trim “DOWN”
Leak Down
2000 PSI (91kg/cm
2
)
Maximum Pressure
600 PSI (35kg/cm
2
)
Minimum Pressure
Maximum Acceptable Amount of
Leak Down in 24 hours is 1 in.
(25.4 mm)