Mercury Mariner Yamaha 200-300HP Power Trim Motor 12V 3-Bolt

Overview

Reversible 12V power trim and tilt motor for selected high-horsepower Mercury, Mariner and Yamaha outboards using a two-wire, three-bolt hydraulic pump assembly. Exact fitment depends on the original motor and trim manifold, not horsepower alone.

Technical specifications

Engine compatibility and OEM references

• Selected Mercury/Mariner 200HP, 225HP, 250HP, 275HP and 300HP six-cylinder applications.
• Selected Mercury 225HP EFI four-stroke applications from the related Yamaha-based family.
• Selected Yamaha 200HP, 225HP, 250HP and 300HP models in the applicable early/mid-2000s trim family.

References to compare: Mercury 888645T02 and 888645T1; Yamaha 60V-43880-00, 69J-43880-00 and 69J-43880-01.

Installation and pre-fit checks

• Support the engine securely, disconnect the battery and relieve hydraulic pressure before removal.
• Compare wire count, bolt pattern, shaft/coupling, housing and terminal style with the original motor.
• Test battery voltage, trim relays, cabling, earths and hydraulic-pump freedom before fitting.
• Fit a new seal, clean the mating surface and tighten mounting bolts evenly to the engine manufacturer's specification.
• Refill and bleed with the specified trim fluid, then test full travel while checking for leaks, abnormal noise and excessive current draw.

Frequently asked questions

Q1. Does it fit every Mercury or Yamaha 200-300HP engine?
No. Match the complete engine and serial number, original reference, two wires, three-bolt flange and shaft coupling.

Q2. Is the hydraulic pump included?
No. The package contains the electric trim motor only.

Q3. Does it include an O-ring?
A sealing O-ring is supplied where included with the motor; inspect the package and always use the correct new seal.

Q4. What should be diagnosed first?
Test the battery, relays, cabling and hydraulic pump because a seized pump or electrical fault can overload a new motor.