Trim Limit Sender Kit – Fits MerCruiser Alpha & Bravo Drives (Replaces 805320A03, 805320A1)

Trim Limit Sender Kit – Fits MerCruiser Alpha & Bravo Drives (Replaces 805320A03, 805320A1)

This trim limit sender kit is designed for use with MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen II, and Bravo stern drives that are equipped with analog gauge instruments. It provides critical position feedback to the trim gauge and sets the upper trim limit.

This component is a direct replacement for Quicksilver/Mercury part number 805320A03, which supersedes older part numbers 805320A1, 17693A2, and 96863A15.

• Direct Replacement: Installs in place of the original OEM unit with no modifications required.
• Complete Kit: Includes the trim limit switch, wire leads, and adapters for older ring terminal connectors.
• Compatibility: Specifically designed for transom assemblies using analog trim gauges.

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 Sender Kit (Replaces 805320A03)
• Wire Leads
• Adapters for older style ring terminal connectors

Installation Guide

1. Disconnect the boat's battery before beginning work.
2. Locate the existing trim limit sender on the starboard side of the transom assembly.
3. Carefully disconnect the two wire leads from the old sender.
4. Remove the two mounting screws securing the sender switch.
5. Remove the old sender unit and clean the mounting surface thoroughly.
6. Position the new trim limit sender and secure it with the original or new screws. Do not overtighten.
7. Connect the new wire leads. Use the included adapters if your boat has older-style ring terminal connectors.
8. Ensure wires are routed safely and secured away from any moving parts to prevent damage.
9. Reconnect the battery.
10. Turn the ignition to the "On" position (without starting the engine) and test the trim gauge and limit switch functionality.

Troubleshooting & FAQ

Q: How do I know if this trim sender kit will fit my MerCruiser drive?
A: This kit is compatible with MerCruiser MC-I, R, MR, Alpha One (Gen I & II), and all Bravo stern drives that use analog gauge instruments. Please check the "Compatible Engine Models" table to confirm your model uses the OEM part number 805320A03.

Q: What are the common symptoms of a failing trim limit sender?
A: Common signs of failure include an inaccurate or non-functioning trim gauge, the gauge needle jumping erratically, or the drive trimming up but not stopping at the preset limit.

Q: My trim gauge doesn't work, but the drive still trims up and down. Is the sender the problem?
A: This kit contains both the trim limit switch (stops the drive) and the trim position sender (for the gauge). If only the gauge is failing, the sender portion is likely faulty, and this kit will resolve the issue.

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.