Sierra 18-5836 Marine Starter Solenoid, Replaces Mercury/Mercruiser 25661, Fits 390 MCM/MIE GM V-8 1969-1970

The Sierra 18-5836 is a marine starter solenoid built to meet or exceed original equipment quality for Mercury/Mercruiser stern drive applications. It is designed to fit the 390 MCM and MIE GM V-8 engine, model years 1969-1970. The solenoid uses a push-button actuator with normally open contacts and screw-type terminals for a secure, corrosion-resistant electrical connection, and its metal housing and white finish are built for the marine environment.

This solenoid is a direct replacement for the original Mercury Marine part and is cross-referenced to Mercury/Mercruiser OEM numbers 25661, 25661T1, and 256611, so it installs as a drop-in swap on qualifying engines without modification. It carries a limited warranty and is sold as a single unit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5836
• Product Type: Marine Starter Solenoid
• Operation Mode: Motor
• Contact Type: Normally Open
• Switch/Actuator Type: Push Button
• Connector/Terminal Type: Screw
• Circuit Type: 1-way
• Number of Positions: 1
• Mounting Type: Surface Mount
• Material: Metal
• Color: White
• Dimensions: 2.88 x 3.25 x 3.25 inches
• Weight: 0.69 pounds
• UPC: 030999236470

Fitment

• 390 MCM and MIE, GM V-8, 1969-1970

Replaces (OEM)

• Mercury/Mercruiser 25661
• Mercury/Mercruiser 25661T1
• Mercury/Mercruiser 256611

Frequently Asked Questions

What engines does the Sierra 18-5836 solenoid fit? The Sierra 18-5836 is designed to fit the 390 MCM and MIE GM V-8 engine for model years 1969-1970.

Is the Sierra 18-5836 a direct replacement for the Mercury/Mercruiser 25661 solenoid? Yes, the Sierra 18-5836 replaces Mercury/Mercruiser OEM numbers 25661, 25661T1, and 256611, so it installs as a direct swap on qualifying engines.

What are the dimensions of this solenoid? The Sierra 18-5836 solenoid measures 2.88 x 3.25 x 3.25 inches.

How much does the Sierra 18-5836 weigh? This solenoid weighs 0.69 pounds.

What material is the Sierra 18-5836 solenoid made of? The housing is metal construction, finished in white, and built to withstand the marine environment.

What type of terminals does the Sierra 18-5836 use? It uses screw-type terminals and a screw connector, with a push-button actuator and normally open contacts.

Is the Sierra 18-5836 genuine OEM or aftermarket? The Sierra 18-5836 is an aftermarket solenoid manufactured to meet or exceed the quality of the original Mercury Marine equipment it replaces.

How many solenoids come in the package? The Sierra 18-5836 is sold as a single solenoid unit.

Does the Sierra 18-5836 have a warranty? Yes, the Sierra 18-5836 solenoid is backed by a limited warranty.

What is the UPC for the Sierra 18-5836 solenoid? The UPC for the Sierra 18-5836 solenoid is 030999236470.

Is the Sierra 18-5836 a 1-way or multi-circuit solenoid? It is a 1-way circuit solenoid with a single position and surface mount configuration.

Will the Sierra 18-5836 fit engines outside the 390 MCM/MIE 1969-1970 range? Fitment for the Sierra 18-5836 is confirmed for the 390 MCM and MIE GM V-8, 1969-1970; buyers should verify their engine's OEM part number matches 25661, 25661T1, or 256611 before ordering.