Tilt Trim Motor – Fits Mercury/Mariner 135-250HP 1996-UP (Replaces 878265A1, 828708T)

Tilt Trim Motor – Fits Mercury/Mariner 135-250HP 1996-UP (Replaces 878265A1, 828708T)

This tilt trim motor is designed for a wide range of Mercury and Mariner 4-stroke outboard engines from 135HP to 250HP, manufactured from 1996 and newer. It also fits 105-140HP Jet drive applications, offering a reliable replacement for original factory parts.

As a direct replacement, this motor matches the fit and function of Mercury/Mariner part numbers 828708, 828708T, 878265A1, 878265A4, and 8M0031551, as well as several aftermarket equivalents.

• Engineered for a direct, bolt-on installation.
• Features a standard 2-wire connection with bullet connector ends.
• Built with a durable, black-painted metal housing for corrosion resistance.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Tilt Trim Motor (828708, 828708T, 878265A1, 878265A4, 8M0031551)

Installation Guide

1. Safety First: Disconnect the battery cables at the battery before beginning any work.
2. Secure the Engine: Tilt the outboard engine to the full "up" position and engage the manual trailering lock for safety.
3. Disconnect Wires: Locate and disconnect the old tilt trim motor's electrical leads (typically blue and green wires).
4. Unbolt the Motor: Remove the mounting bolts securing the old motor to the trim and tilt assembly. Keep track of any hardware.
5. Remove Old Motor: Carefully detach the old motor from the housing. You may need to gently pry it loose. Note the orientation of the drive shaft.
6. Clean Surface: Thoroughly clean the mounting surface on the trim assembly to ensure a proper seal with the new motor.
7. Install New Motor: Position the new motor, aligning the drive shaft and mounting holes. Secure it with the original bolts, tightening them to the manufacturer's specified torque.
8. Reconnect Wires: Connect the new motor's electrical leads, ensuring the connections are clean and secure.
9. Test Functionality: Reconnect the battery cables, disengage the trailering lock, and test the full range of motion (up and down) to ensure proper operation.

Troubleshooting & FAQ

Q: How do I confirm this tilt trim motor will fit my specific engine?

A: The best way is to compare your original part number to those listed in our Part Number Cross-Reference table. Additionally, check your engine model, HP, and year against the Compatible Engine Models list. For Mercury engines, using the serial number guide can further confirm a match.

Q: What are common signs that my tilt trim motor is failing?

A: Common symptoms include slow or jerky movement, a grinding or whirring noise when operating the trim, or the motor failing to operate at all. Sometimes, an electrical issue like a blown fuse or bad relay can be the cause, so check those first.

Q: Is this a 2-wire or 3-wire motor?

A: This is a 2-wire motor featuring a reversible rotation design with bullet connector ends for simple connection.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.