Sierra 18-5737 Power Trim Relay for Mercury Mariner Outboard

The Sierra 18-5737 is a high-quality replacement power trim relay designed for Mercury and Mariner outboard motors. This relay controls the power trim system, which adjusts and maintains the proper angle of the outboard motor for optimal performance under varying conditions.

Key Features:

• Direct replacement for Mercury Marine OEM part number 87-19761
• Also replaces CDI part number 852-9809
• 12-volt operation for reliable performance
• Precision-engineered to meet or exceed original equipment specifications
• Easy installation, typically located on the starboard side of the motor
• Premium quality construction for extended service life

Applications:

• Mercury/Mariner 40 HP (4-cylinder) outboards with relays, serial number OC159200 and up
• Compatible with engines equipped with power trim systems

The power trim relay is a critical component that uses an electromagnet to open or close the trim circuit when properly energized. Common signs of relay failure include intermittent trim operation or complete system failure. Sierra Marine parts are backed by the manufacturer's industry-leading customer satisfaction warranty.