Analog Trim Sender 8M0098264 – Mercury Starboard 40–115 HP

How to Match This Part

This aftermarket analog power trim sender replaces Mercury / Mariner / Quicksilver 8M0098264 (and superseded numbers 8M0074845, 821400A2, and 821400A05). It mounts on the starboard side and reports outboard trim position to a traditional analog trim gauge.

Match this part in this order:
1. Number on the sender you remove — 8M0098264, 8M0074845, 821400A2, or 821400A05
2. Mount side — starboard only (this is not a port-mount sender)
3. Engine family + serial on the transom-bracket / cowling ID plate against the compatibility table, then compare mounting style with the product images

This is a starboard-mount analog power trim sender — not a digital SmartCraft trim sender, air temperature sensor, coolant temperature sender, or trim limit switch. Do not order by horsepower alone when a serial range is listed.

Part Number Cross-Reference

Use these verified Mercury numbers to confirm you have the correct starboard analog trim sender. Brand names and OEM numbers are for identification only.

This is an aftermarket part manufactured by JLM Marine. It is not sold as a genuine Mercury Marine, Mariner, or Quicksilver component.

Compatible Engine Models

Confirm your engine model and serial number on the mounting bracket or cowling identification plate. Use the Mercury Serial Number Guide and Mercury Parts Diagrams to verify the starboard trim-sender callout on your power-trim diagram.

Always match the number stamped on the sender you remove and confirm starboard mounting. Port-mount senders and digital SmartCraft trim senders use different Mercury part numbers.

Technical Specifications

Installation Guide

1. 1Turn the ignition off and disconnect the negative battery cable before working around the trim system or electrical harness.
2. 2Locate the existing starboard analog trim sender on the power-trim / swivel-bracket area per your engine’s parts diagram. Note wire routing, terminal orientation, and mounting fastener positions before removal.
3. 3Disconnect the leads, remove the mounting fasteners, and withdraw the old sender. Compare the new unit side by side with the original — mount side, drive engagement, and connector style must match the product images.
4. 4Install the new sender in the same starboard orientation so the sender drive engages the trim shaft correctly, tighten fasteners to the torque values in your Mercury / Mariner service manual, and reconnect the leads.
5. 5Reconnect the battery, run the trim through its full range, and confirm smooth analog gauge response with no binding of the sender drive.

Note: Professional installation is recommended if you are unsure about starboard alignment or gauge calibration.

Troubleshooting & FAQ

Important Notes

• Verify the OEM number on your original sender, starboard mount side, and engine serial against the compatibility table before ordering.
• Do not confuse this analog starboard trim sender with digital SmartCraft trim senders or air / coolant temperature sensors.
• This is an aftermarket replacement and is not a genuine Mercury Marine / Mariner / Quicksilver OEM component.
• OptiMax engines that specify a digital trim sender require a different Mercury part number — match the diagram callout, not horsepower alone.

Why Choose JLM MARINE?

• Precision Fit: Cross-referenced to Mercury 8M0098264 (and superseded 8M0074845 / 821400A2 / 821400A05) for the starboard analog applications listed above.
• Quality Control: Each batch is inspected for dimensional consistency and workmanship.
• Direct from Manufacturer: Aftermarket marine analog trim senders engineered for reliable power-trim position feedback.