ARCO Mercury Alpha Bravo Tilt Trim Sender

The ARCO tilt trim sender is a replacement position-sensing component for Mercury sterndrive trim systems. It is identified for MC-I, R, MR, Alpha, Alpha Gen II, and Bravo drive families, giving it broad coverage across several generations of Mercury drive hardware. The sender provides the trim-position signal used by the boat’s compatible indication system. Because drive generations and sender arrangements differ, the existing part number and drive family should both be checked before installation.

Mercury 805320A03 and 805320A1 are listed among the primary replacement references for this sender. The supplier also cross-references 17693A2, 96863A15, 63115A12, 88678A4, and 88678A5, along with Sierra 18-7633. Those numbers are useful when the drive identification tag is difficult to read or the sender has been replaced previously. Comparing the connector, lead routing, and mounting position with the removed sender can also help prevent a mismatch.

Sender replacement should be followed by the adjustment procedure specified for the installed Mercury drive so the indicated trim position corresponds with actual drive movement. Route and secure the leads so they are not pinched through the full trim range. ARCO lists 12-month parts-and-labor warranty protection for this component. Once adjusted, cycle the drive through its normal range and verify that the trim indication responds consistently before returning the boat to service.

• Covers multiple Mercury Alpha and Bravo drive families
• Cross-references several Mercury sender part numbers
• Also cross-references Sierra 18-7633
• Designed to restore trim-position feedback to the compatible indication system

For additional Mercury trim-system replacement parts and motors, Browse more Tilt & Trim Motors for related replacement and service components.