Power Trim Sender Kit – Fits MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen II and Bravo Sterndrives (Replaces 805320A03)

Power Trim Sender Kit – Fits MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen II and Bravo Sterndrives

This power trim sender kit is designed for a wide range of MerCruiser stern drive applications, including MC-I, R, MR, Alpha One, Alpha One Gen II, and Bravo models. It provides a reliable replacement for your original trim components, ensuring your trim gauge reads accurately and the trim limit safety function works correctly.

This kit is a direct replacement for Mercury/Quicksilver part numbers 805320A03, 96863A15, 805320A1, 17693A2, and Sierra part number 18-7633.

• Includes both the trim limit switch and the trim sender for a complete installation.
• Comes with necessary wire leads for a secure connection.
• Engineered for a direct, hassle-free replacement of the original parts.

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 Trim limit switch
• 1 x Trim sender switch
• 2 x Wire leads

Installation Guide

Follow these general steps for installation. It is recommended that a qualified marine mechanic perform the installation.

1. Disconnect the boat's battery to prevent electrical shorts.
2. Locate the existing power trim sender and limit switch assembly on the sterndrive.
3. Carefully disconnect the electrical wire leads from the old switches.
4. Remove the mounting hardware securing the old sender and switch assembly.
5. Clean the mounting surface to ensure a good seal and fit for the new components.
6. Position the new trim sender and limit switch and secure them with the mounting hardware.
7. Connect the new wire leads to the corresponding terminals on the boat's wiring harness.
8. Reconnect the boat's battery.
9. Test the trim system to ensure the gauge reads correctly and the limit switch functions as expected.

Troubleshooting & FAQ

How do I confirm this fits my engine?

Verify your sterndrive model is listed (e.g., Alpha One Gen II, Bravo). The most reliable method is to cross-reference the part number from your old sender with the numbers listed in our cross-reference table, such as 805320A03.

What are the signs of a faulty trim sender?

Common symptoms include an inaccurate or non-responsive trim gauge on your dashboard, or the sterndrive trimming up too far because the limit switch is not engaging. This can result in the drive being trimmed beyond its safe operating range.

Will this kit work with a SmartCraft system?

No, this trim sender kit is not compatible with MerCruiser SmartCraft digital systems. It is intended for standard analog gauge systems.

OEM vs. Aftermarket?

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.

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

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.

What is your warranty and return policy?

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.