Trim Limit Sender Kit – Fits MerCruiser Alpha & Bravo Drives (Replaces 805320A03, 805320A1)
Trim Limit Sender Kit – Fits MerCruiser Alpha & Bravo Drives (Replaces 805320A03, 805320A1) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Trim Limit Sender Kit – Fits MerCruiser Alpha & Bravo Drives (R...
Product Details
This aftermarket Trim Limit Sender Kit – Fits MerCruiser Alpha & Bravo Drives (Replaces 805320A03, 805320A1) is designed for 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 limits the trim range to prevent damage.
This kit is a direct replacement for Quicksilver/Mercury part number 805320A03 and serves as an interchange for older parts 805320A1, 17693A2, and 96863A15.
- Installs as a direct replacement for the original OEM unit.
- Engineered for transom assemblies using analog trim gauges.
- Includes wire leads and adapters for older ring terminal connectors.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Quicksilver/Mercury | 805320A1 | 805320A03 |
| Quicksilver/Mercury | 17693A2 | 805320A03 |
| Quicksilver/Mercury | 96863A15 | 805320A03 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser drives, this kit fits all listed models that utilize an analog trim gauge system.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| MerCruiser | MC-I | 805320A03 | |
| MerCruiser | R | 805320A03 | Same as Pre-Alpha, Mod.1 |
| MerCruiser | MR | 805320A03 | Same as Alpha One Gen I |
| MerCruiser | Alpha One | 805320A03 | |
| MerCruiser | Alpha One Gen II | 805320A03 | |
| MerCruiser | Bravo | 805320A03 | All Bravo models |
Technical Specs
- Product Type
- Trim Limit Sender Kit
- Installation
- Direct replacement for OEM unit
- Compatible Instruments
- Analog gauges only
- Application
- Alpha and Bravo transom assemblies
- Housing Color
- Black
- Connection
- Includes wire leads and adapters for ring terminal connectors
- Other Technical Attributes
- Kit includes trim limit switch and wire leads
What’s in the Box
- 1 x Trim Limit Sender Kit (805320A03)
- Wire Leads
- Adapters for older style ring terminal connectors
Installation Notes
- Disconnect the boat's battery to prevent electrical shorts.
- Access the transom assembly and locate the existing trim limit sender.
- Carefully disconnect the wiring and unbolt the old sender from the bell housing.
- Clean the mounting surface before positioning the new sender.
- Install the new sender, ensuring it is correctly oriented. Secure the mounting hardware.
- Connect the wiring harnesses. Use the included adapters if your boat has older ring-style terminals.
- Reconnect the battery and test the trim gauge and limit switch functionality through the full range of motion.
Troubleshooting & FAQ
How do I know if my trim sender is failing?
Common signs of a faulty trim sender include an erratic or non-functional trim gauge, or the trim system failing to stop at its upper or lower limits. You may also see "ghost" movements on the gauge when the drive is not being operated.
Is this kit compatible with digital gauges or SmartCraft systems?
No, this trim sender kit is specifically designed for use with analog gauge instruments only. It will not function correctly with digital dash displays or Mercury SmartCraft systems, which require a different type of sender.
Will this fit my specific Alpha One Gen II drive?
Yes, this kit is confirmed to work with all Alpha and Bravo transom assemblies, including Alpha One Gen II, provided they utilize an analog trim gauge. The compatibility is with the transom assembly and instrumentation, not just the drive model itself.
What is the difference between the trim limit and trim sender functions?
The trim sender component relays the stern drive's tilt position to the dashboard gauge. The trim limit switch is a safety feature that prevents the drive from trimming up too high while the boat is underway, which could cause instability. This kit includes both functions in one assembly.
What is the recommended replacement interval for a trim sender?
There is no fixed replacement interval. Trim senders are typically replaced only when they fail. Given their location in a harsh marine environment, regular inspection for corrosion or physical damage is recommended.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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