Power Trim Sender Kit – Fits Mercury/MerCruiser Alpha & Bravo Drives (Replaces 805320A03)

Power Trim Sender Kit – Fits Mercury/MerCruiser Alpha & Bravo Drives (Replaces 805320A03)

This power trim sender kit is designed for a wide range of Mercury/MerCruiser stern drives, including the MC-I, R, MR, Alpha One, Alpha One Gen II, and Bravo series. It is engineered specifically for systems equipped with analog instruments.

This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, including Mercury/Quicksilver 805320A03, 805129A3, 805130A2, 805320A1, 17693A2, 96863A15, and Sierra 18-7633, ensuring broad compatibility and a straightforward installation.

• Engineered for a direct replacement fit.
• Compatible only with systems using analog gauges.
• Kit includes both the trim sender and trim limit switch.

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 Sender (805320A03)
• 1 x Trim Limit Switch

Installation Guide

1. Safety First: Disconnect the boat's battery to prevent any electrical shorts during installation.
2. Locate and Remove Old Unit: Locate the old trim sender and limit switch on the stern drive. Carefully disconnect the wiring and remove the mounting hardware.
3. Clean the Surface: Thoroughly clean the mounting area to ensure a flush fit and proper contact for the new assembly.
4. Mount New Kit: Position the new trim sender and limit switch, and secure it with the appropriate mounting screws.
5. Connect Wiring: Attach the electrical connectors, ensuring they match the original configuration. Crimp connections securely.
6. Reconnect Power: Reconnect the battery.
7. Test Operation: Turn on the ignition and test the trim gauge by moving the stern drive up and down. Confirm the gauge responds accurately and the limit switch functions correctly.
8. Seal Connections: It is recommended to apply a marine-grade sealant around wire entry points to prevent water intrusion.

Troubleshooting & FAQ

How do I know if this trim sender kit will fit my MerCruiser drive?
This kit is compatible with MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen II, and Bravo stern drives that use analog instruments. Please check the "Compatible Engine Models" and "Part Number Cross-Reference" tables to confirm it replaces your specific part number.

My trim gauge is not reading correctly after installation. What should I do?
First, ensure all wiring connections are secure and correct. This kit is designed for analog gauges only; it will not work with digital systems. Verify that the sender and limit switch are mounted correctly and that the actuator moves freely.

What are the signs that my old trim sender is failing?
Common signs include an erratic or non-functional trim gauge, the gauge being stuck in one position, or intermittent readings. This indicates it may be time to replace the sender unit.

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.