828708 Tilt/Trim Motor for Mercury Mariner 135HP 150HP 175HP 200HP 225HP | JLM Marine

Tilt/Trim Motor for Mercury Mariner 135HP 150HP 175HP 200HP 225HP

This aftermarket tilt/trim motor is designed to fit Mercury and Mariner outboard motors ranging from 135 HP to 225 HP (1995-2004), including Magnum III and XR6 engine series. Engineered for reliable performance, it provides a direct replacement solution for your power trim system.

This motor directly replaces OEM part numbers 828708, 828708T, 878265A1, 878265A4 and is compatible with multiple aftermarket brands including Arco Marine, API Marine, Sierra Marine, and Remy Small Motor for broad cross-reference coverage.

• 12-volt DC reversible motor with tanged shaft design
• Includes two 3-1/2 foot long wire harnesses with bullet connectors
• Features (2) 6.5mm ID mounting holes for secure installation

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 × Tilt/Trim Motor (OEM# 828708)
• 2 × Wire harnesses (3-1/2 foot long with bullet connectors)

Installation Guide

1. Disconnect the battery: Ensure the negative terminal is disconnected to prevent electrical shock or short circuits during installation.
2. Locate the existing tilt/trim motor: Identify the motor on your outboard engine assembly and note the wire connections.
3. Disconnect the wire harness: Carefully unplug the bullet connectors from the existing motor. Label wires if necessary for easier reconnection.
4. Remove mounting bolts: Unscrew the bolts securing the old motor using the appropriate tools. Keep the hardware for reuse if in good condition.
5. Remove the old motor: Carefully pull the motor away from the mounting bracket. Check the mounting surface for debris or corrosion.
6. Position the new motor: Align the tanged shaft and mounting holes of the new motor with the bracket on your outboard.
7. Secure with bolts: Insert and tighten the mounting bolts through the 6.5mm ID holes. Torque to manufacturer specifications if available.
8. Connect the wire harness: Attach the bullet connectors from the new motor to the corresponding engine wiring. Ensure connections are firm and fully seated.
9. Verify motor alignment: Check that the motor shaft engages properly with the trim mechanism. There should be no binding or excessive play.
10. Reconnect the battery: Reattach the negative battery terminal securely.
11. Test motor operation: Use the tilt/trim switch to raise and lower the outboard several times. Listen for smooth operation and check for unusual noises.
12. Final inspection: Confirm all connections are secure and there are no fluid leaks from the trim system.

Troubleshooting & FAQ

Q: How do I confirm this motor fits my specific Mercury or Mariner engine?
A: Cross-reference your engine's horsepower (135-225 HP), year (1995-2004), and series (Magnum III or XR6) with the compatibility table above. Verify your original motor's part number matches 828708, 828708T, 878265A1, or 878265A4.

Q: What are the signs that my tilt/trim motor needs replacement?
A: Common symptoms include slow or no response when using the trim switch, unusual grinding or clicking noises, intermittent operation, or the motor running but not moving the outboard. Electrical issues like blown fuses can also indicate motor failure.

Q: Will this aftermarket motor perform the same as the OEM Mercury part?
A: Yes, this motor is built to OEM specifications with comparable materials and performance. It features the same voltage (12V), reversible rotation, tanged shaft design, and mounting configuration as the original Mercury part.

Q: Do I need to replace any other components when installing this motor?
A: In most cases, the motor can be installed using existing mounting hardware and connections. However, inspect your wire harness connectors and hydraulic fluid levels in the trim system, and replace if worn or damaged.

Q: Can I install this motor myself or do I need a professional?
A: If you have basic mechanical skills and tools, installation is straightforward following the guide above. However, if you're unfamiliar with marine electrical systems or trim mechanisms, professional installation is recommended for safety and optimal performance.

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.