Sierra 18-6781 Tilt/Trim Motor, Replaces Yamaha 6H1-43880-02-00, Fits 40-90HP Outboards

The Sierra 18-6781 is a replacement tilt/trim motor built to power the power trim and tilt system on Yamaha outboard motors. It uses a 2-wire electrical connection and a 3 bolt mounting pattern, matching the original motor's fit and function so the trim system operates as designed. The housing is metal construction with a silver finish, and the motor runs on a standard 12 Volt DC marine electrical system. This is a direct interchange for the Yamaha 6H1-43880-02-00 tilt/trim motor, giving boat owners a way to restore tilt and trim operation without sourcing the original Yamaha part.

This motor is intended for outboard owners whose trim system motor has failed, is drawing excessive current, or is no longer tilting or trimming the outboard smoothly. Because it shares the same 2-wire connection and 3 bolt mount as the original equipment motor, installation follows the same wiring and mounting steps used for the OEM unit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6781
• Product Name: Tilt/Trim Motor
• Electrical Connection: 2-wire connection
• Mounting: 3 bolt mount
• Voltage: 12 Volts (DC)
• Material: Metal
• Color: Silver
• Engine Type: 4 Stroke
• Fuel Type: Gasoline
• Operation Mode: Manual
• Weight: 2.94 pounds
• UPC: 808282122034

Fitment

• Yamaha 40HP (1994)
• Yamaha 50HP (1992-95)
• Yamaha 60HP (1997-up)
• Yamaha 70HP (1996-up)
• Yamaha 90HP (1992-up)

Replaces (OEM)

• 6H1-43880-02-00

Frequently Asked Questions

What outboard motors does the Sierra 18-6781 tilt/trim motor fit? The Sierra 18-6781 fits Yamaha outboards including 40HP (1994), 50HP (1992-95), 60HP (1997-up), 70HP (1996-up), and 90HP (1992-up).

Is the 18-6781 a direct replacement for the Yamaha 6H1-43880-02-00 motor? Yes, the Sierra 18-6781 replaces the Yamaha 6H1-43880-02-00 tilt/trim motor and uses the same 2-wire connection and 3 bolt mount.

How many wires connect to this tilt/trim motor? The Sierra 18-6781 uses a 2-wire electrical connection.

What voltage does the 18-6781 tilt/trim motor run on? It is a 12 Volt DC motor, matching standard outboard trim system electrical circuits.

How is the Sierra 18-6781 mounted to the trim system? It bolts on with a 3 bolt mounting pattern, the same mounting configuration as the original Yamaha motor it replaces.

What is the tilt/trim motor housing made of? The 18-6781 tilt/trim motor has a metal housing with a silver finish.

How much does the Sierra 18-6781 weigh? The Sierra 18-6781 tilt/trim motor weighs 2.94 pounds.

Will the 18-6781 fit a 60HP Yamaha from 1997? Yes, the Sierra 18-6781 is listed to fit Yamaha 60HP outboards from 1997 and up.

Does the 18-6781 fit both 70HP and 90HP Yamaha outboards? Yes, coverage includes Yamaha 70HP outboards from 1996-up and 90HP outboards from 1992-up.

What signs indicate a tilt/trim motor needs replacing? A trim system that no longer tilts or trims smoothly, runs slowly, or draws excessive current typically points to a failing tilt/trim motor like the one the Sierra 18-6781 replaces.

Is a mounting o-ring needed with the 18-6781 tilt/trim motor? The Sierra 18-6781 tilt/trim motor is designed to mount using the same 3 bolt pattern as the original Yamaha unit it replaces.

What is the UPC for the Sierra 18-6781 tilt/trim motor? The UPC for the Sierra 18-6781 tilt/trim motor is 808282122034.