Boat owners with Mercury or Mariner OptiMax outboards, this trim sensor assembly is exactly what you need if your trim gauge isn't working properly. This is the genuine sensor assy-trim that fits Mercury and Mariner V6 Digital OptiMax outboards for USA models 0G960500 and newer. It's port-mounted and designed to accurately measure and report your engine's trim position to the gauge on your dashboard. When this sensor goes bad, you'll typically see your trim gauge acting erratically, not moving at all, or showing incorrect positions - which makes docking and trailering way more difficult than it needs to be. Installation is pretty straightforward if you're comfortable with basic marine mechanics - just disconnect the battery first for safety, locate the old sensor on the port side of your engine, swap the connections, and you're back in business. The quality matches OEM specifications, ensuring reliable performance and accurate trim readings. Having a properly functioning trim sensor isn't just about convenience - it's about safety and protecting your engine from damage caused by incorrect trim angles. Whether you're dealing with a completely failed sensor or just want to have a spare on hand for when it eventually wears out, this is the right part for keeping your OptiMax running smoothly. Make sure to check your specific model number before ordering, but if you've got a V6 Digital OptiMax from the specified years, this sensor will get your trim system working like new again.