Sierra 18-5802 Marine Solenoid, White, Replaces Mercury Marine 65057A1, 65057T1, 65057, 54981

The Sierra 18-5802 is a marine solenoid built to meet or exceed original equipment quality for boats and marine engines that use this component. Finished in white, it is supplied as a single unit ready for installation as a direct replacement for the Mercury Marine solenoids it is designed to replace. Solenoids like this one act as the electrical switch that allows a low-current signal, such as a key-start circuit, to engage a much higher-current circuit, a role that is essential to reliable engine starting and electrical system operation on the water. Because marine electrical components are exposed to vibration, moisture, and temperature swings, using a solenoid manufactured to original equipment quality standards helps ensure consistent, dependable performance. The Sierra 18-5802 is cataloged under Mercruiser solenoids and is cross-referenced to Mercury Marine part numbers 65057A1, 65057T1, 65057, and 54981, making it straightforward to identify as the correct replacement when an original part number is known. It ships as a single, complete solenoid with no additional components required beyond the part itself. Buyers should confirm their original part number against the replacement list below before ordering to ensure proper fit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5802
• Product Type: Solenoid
• Color: White
• Category: Mercruiser Solenoids
• Weight: 0.71 pounds
• Dimensions: 8 x 6 x 4 inches
• UPC: 030999237286
• Unit Count: 1

Replaces (OEM)

• 65057A1
• 65057T1
• 65057
• 54981

Frequently Asked Questions

What does the Sierra 18-5802 solenoid replace? The Sierra 18-5802 is a direct cross-reference for Mercury Marine solenoid part numbers 65057A1, 65057T1, 65057, and 54981.

What color is the Sierra 18-5802 solenoid? It is finished in white, matching the original equipment appearance for the Mercury Marine solenoids it replaces.

How much does the Sierra 18-5802 weigh? The Sierra 18-5802 solenoid weighs 0.71 pounds.

What are the dimensions of the Sierra 18-5802 solenoid? Listed dimensions for the Sierra 18-5802 solenoid are 8 x 6 x 4 inches.

Is the Sierra 18-5802 an OEM part or an aftermarket replacement? The 18-5802 is a Sierra-manufactured replacement solenoid engineered to meet or exceed original equipment quality, not a genuine Mercury Marine part.

How many solenoids come in the package? The Sierra 18-5802 ships as a single solenoid, one unit per package.

What category of equipment is the 18-5802 solenoid used with? Sierra catalogs the 18-5802 under Mercruiser solenoids.

How do I know if the 18-5802 is the correct replacement for my old solenoid? Check the part number on your existing solenoid against the Sierra 18-5802 cross-reference list: 65057A1, 65057T1, 65057, and 54981. A match on any of these confirms fit.

Does the Sierra 18-5802 include a warranty? Yes, the Sierra 18-5802 solenoid is covered by a limited warranty.

Is the Sierra 18-5802 the same as a starter solenoid? The Sierra 18-5802 is cataloged and sold specifically as a solenoid; buyers needing a dedicated starter solenoid for a different application should confirm the correct part number against their original equipment before ordering.