Sierra 18-6780 Tilt and Trim Motor - Replaces 438529, 438531, 434496, Fits Johnson/Evinrude 90-225 HP (1991-Up)

The Sierra 18-6780 Tilt and Trim Motor is a direct replacement trim motor built for Johnson and Evinrude outboard applications. It replaces OEM numbers 438529, 438531, and 434496, giving boat owners a straightforward way to restore power tilt and trim function without sourcing a discontinued original part. The motor is finished in white, uses a transom mount design, and is engineered for 2 stroke gasoline outboards, including salt water use where corrosion resistance matters most.

Each unit ships as a single motor per package. Sierra builds this trim motor to meet or exceed the performance of the original equipment part it replaces, so fit and function match what the outboard was originally designed around. It is intended to bolt into the existing trim system on applicable Johnson and Evinrude outboards without modification, restoring reliable up and down trim and tilt operation.

This trim motor fits a specific range of Johnson/Evinrude outboard horsepower and year combinations, so confirm the horsepower and model year listed below before ordering to make sure the 18-6780 is the correct match for your outboard.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6780
• Weight: 2.94 pounds
• Color: White
• Engine Type: 2 Stroke
• Mounting Type: Transom Mount
• Fuel Type: Gasoline
• Recommended Use: Salt Water
• UPC: 808282105136
• Unit Count: 1
• OEM Cross Reference: 438529, 438531, 434496

Fitment

• Johnson/Evinrude 90, 115, 200, 225 HP (1991-Up)
• Johnson/Evinrude 120, 140 HP (1991-94)
• Johnson/Evinrude 130 HP (1995-Up)

Replaces (OEM)

• 438529
• 438531
• 434496

Frequently Asked Questions

What does the Sierra 18-6780 tilt and trim motor fit? The Sierra 18-6780 fits Johnson/Evinrude outboards at 90, 115, 200, and 225 HP for 1991-Up, 120 and 140 HP for 1991-94, and 130 HP for 1995-Up.

What OEM part numbers does the 18-6780 replace? It replaces OEM numbers 438529, 438531, and 434496 on applicable Johnson/Evinrude outboards.

Is the Sierra 18-6780 an original equipment part or aftermarket? It is an aftermarket replacement built by Sierra to meet or exceed the performance of the original 438529, 438531, and 434496 motors it replaces.

How much does the 18-6780 trim motor weigh? The Sierra 18-6780 tilt and trim motor weighs 2.94 pounds.

What color is the 18-6780 trim motor? It is finished in white.

Is the 18-6780 suitable for salt water use? Yes, Sierra recommends the 18-6780 tilt and trim motor for salt water applications.

How many motors come in the package? One Sierra 18-6780 tilt and trim motor ships per package.

What type of engine is the 18-6780 designed for? The 18-6780 is designed for 2 stroke gasoline outboard engines.

How is the 18-6780 trim motor mounted? It uses a transom mount configuration.

Will the 18-6780 fit a 130 HP Johnson/Evinrude outboard? Yes, for the 1995-Up 130 HP Johnson/Evinrude outboard the 18-6780 is a listed fit.

Will the 18-6780 fit a 140 HP outboard from any model year? The 18-6780 covers the 140 HP Johnson/Evinrude outboard for the 1991-94 model years specifically.