Tilt Trim Sender Limit Kit – Fits MerCruiser Stern Drives MC-I, R, MR, Alpha One, Alpha One Gen 2, Bravo (Replaces 805320A03, 805320A1)
Tilt Trim Sender Limit Kit – Fits MerCruiser Stern Drives MC-I, R, MR, Alpha One, Alpha One Gen 2, Bravo (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
Tilt Trim Sender Limit Kit – Fits MerCruiser Stern Drives MC-I, R, ...
Product Details
This Tilt Trim Sender Limit Kit provides a reliable replacement for original MerCruiser stern drive components. It is specifically designed to fit a wide range of models, including MC-I, R, MR, Alpha One, Alpha One Gen 2, and Bravo I, II, and III stern drives.
This kit serves as a direct interchange for multiple MerCruiser and aftermarket part numbers, including 805320A03, 805320A1, 17693A2, 96863A15, 63115A12, 88678A4, 88678A5, Sierra 18-7633, and Red Rhino MR-971.
- Installs as a direct replacement for the original factory parts.
- Includes wire leads with pre-attached electrical connectors for a plug-and-play setup.
- Mounts directly to the gimbal housing for proper trim and tilt functionality.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 805320A03 |
| MerCruiser | 805320A1 |
| MerCruiser | 17693A2 |
| MerCruiser | 96863A15 |
| MerCruiser | 63115A12 |
| MerCruiser | 88678A4 |
| MerCruiser | 88678A5 |
| Sierra | 18-7633 |
| Red Rhino | MR-971 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is compatible with the following MerCruiser stern drive models.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| MerCruiser | MC-I | 4-Stroke | 805320A03 |
| MerCruiser | R | 4-Stroke | 805320A03 |
| MerCruiser | MR | 4-Stroke | 805320A03 |
| MerCruiser | Alpha One | 4-Stroke | 805320A03 |
| MerCruiser | Alpha One Gen 2 | 4-Stroke | 805320A03 |
| MerCruiser | Bravo I | 4-Stroke | 805320A03 |
| MerCruiser | Bravo II | 4-Stroke | 805320A03 |
| MerCruiser | Bravo III | 4-Stroke | 805320A03 |
Technical Specs
- Product Type
- Tilt/Trim Sender Limit Kit
- Installation
- Direct replacement
- Connection
- Wire leads with electrical connectors
- Fitting Type
- Direct mount to gimbal housing
- Other Technical Attributes
- Trim limit switch on port side; trim position sender on starboard side
What’s in the Box
- 1 x Trim Sender & Limit Kit (Replaces 805320A03)
Installation Notes
- Engage safety measures by disconnecting the boat's battery.
- Tilt the stern drive to the full "up" position to access the assembly on the gimbal housing.
- Carefully disconnect the electrical connectors for the old sender and limit switch.
- Remove the mounting hardware securing the old components and detach them from the drive.
- Clean the mounting surfaces thoroughly before positioning the new kit.
- Install the new trim limit switch on the port side and the trim position sender on the starboard side.
- Secure the new components, tightening fasteners to the manufacturer's recommended torque specifications.
- Reconnect the wire leads, ensuring a secure and corrosion-free connection.
- Reconnect the boat's battery.
- Power on the ignition and test the full range of the trim and tilt functions, verifying the gauge reads correctly.
Troubleshooting & FAQ
How do I confirm this kit will fit my specific MerCruiser drive?
This kit fits MerCruiser MC-I, R, MR, Alpha One, Alpha One Gen 2, and Bravo I, II, & III stern drives. Verify your drive model and compare your old part's connectors to the images to ensure a match.
What are common symptoms of a failing trim sender kit?
The most common signs include an inaccurate or non-functional trim gauge on your dashboard, the drive trimming up but not down (or vice versa), or the trim pump running continuously. These issues point to a failure in either the sender (gauge) or the limit switch (movement).
Is this a single unit or two separate pieces?
This is a complete kit containing two primary components: the trim limit switch, which installs on the port side of the gimbal housing, and the trim position sender for the starboard side.
Do I need special tools for installation?
Basic hand tools such as wrenches, sockets, and screwdrivers are typically sufficient. However, having a torque wrench is recommended to tighten fasteners to the correct specifications for a secure, leak-free seal.
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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