Sierra Power Trim Relay 18-5737 for Mercury 40 HP 4-Cylinder Outboards, Replaces 87-19761

The Sierra 18-5737 Power Trim Relay is a boat-mount electrical relay used in the power trim and tilt circuit of applicable Mercury outboard motors. It uses a quick connect terminal style and a normally open contact configuration, allowing it to switch the higher current draw of the trim/tilt motor circuit when the operator engages trim or tilt at the control switch. This relay is designed for Mercury 40 HP 4-cylinder outboards equipped with relays, covering units from serial number 0C159200 and up. It is a direct interchange for Mercury cross-reference number 87-19761, so it can be installed as a like-for-like replacement without modification to the existing wiring harness or mounting hardware. The relay ships as a single unit and is intended as a drop-in replacement part for boat owners and marine technicians performing trim system diagnostics or relay replacement on affected Mercury outboards. As with all Sierra electrical components, the 18-5737 is built to meet or exceed the performance of the original equipment part it replaces, giving boaters a reliable option for restoring proper power trim operation.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5737
• Connector Type: Quick Connect
• Contact Type: Normally Open
• Mounting Type: Boat Mount
• UPC: 808282103392
• Weight: 0.08 pounds
• Quantity: 1 relay

Fitment

• Mercury 40 HP 4-cylinder outboards with relays, serial number 0C159200 and up

Replaces (OEM)

• Mercury 87-19761

Frequently Asked Questions

What is the Sierra 18-5737 used for? The Sierra 18-5737 is a power trim relay that switches the trim/tilt motor circuit on applicable Mercury outboards when the operator activates the trim or tilt control.

Will the 18-5737 relay fit my Mercury outboard? The 18-5737 fits Mercury 40 HP 4-cylinder outboards equipped with relays, from serial number 0C159200 and up.

Is the Sierra 18-5737 a direct replacement for the Mercury OEM relay? Yes, part number 18-5737 is a direct interchange for Mercury cross-reference number 87-19761 and installs in place of it.

What type of electrical connection does this relay use? The 18-5737 Power Trim Relay uses a quick connect terminal style, so it attaches to the existing trim circuit wiring without needing to splice or solder connections.

Is the 18-5737 relay normally open or normally closed? It is a normally open (N.O.) contact relay, meaning the circuit stays open until the trim switch is activated.

How is the Sierra 18-5737 relay mounted? This is a boat-mount relay, meaning it is secured to a mounting surface on the boat or engine rather than being a plug-in or panel style unit.

How much does the 18-5737 relay weigh? The Sierra 18-5737 Power Trim Relay weighs 0.08 pounds.

How many relays come in the package? The 18-5737 is sold as a single relay unit.

Is the Sierra 18-5737 an OEM or aftermarket part? The 18-5737 is a Sierra aftermarket relay built to meet or exceed the performance of the original Mercury 87-19761 relay it replaces.

Does the 18-5737 relay come with a warranty? The Sierra 18-5737 Power Trim Relay is covered under Sierra's standard limited warranty against defects.