Sierra 18-5602 Outboard Starter, Replaces Mercury 50-67341, Fits 35-40 HP 2-Cyl & 50 HP 4-Cyl Models

The Sierra 18-5602 is a marine-grade outboard starter built as a direct replacement for Mercury outboard engines, engineered to meet or exceed original equipment performance. It is designed to fit 35-40 HP 2 cylinder and 50 HP 4 cylinder Mercury outboard models. The starter uses high quality magnets and field coils to deliver strong starting torque even in demanding marine conditions, while double sealed housings protect internal components from moisture and salt spray for a longer service life. High quality brushes further extend durability under repeated starts. Construction meets SAE J1171 and ISO 8846 marine electrical standards, the industry benchmarks for ignition protection and safety on boats. This starter is a direct cross reference for Mercury part numbers 50-67341, 50-58788A3, 50-893891T, and 50-44369A1, making it a straightforward swap for boat owners replacing a worn or failed OEM unit. Every Sierra part is backed by Sierra's customer satisfaction warranty, giving buyers confidence in fit and function. Whether performing a routine replacement or restoring a non-starting outboard, the 18-5602 provides a reliable, marine-rated solution built specifically for the harsh operating environment of outboard engines.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5602
• Item Dimensions (L x W x H): 12.13 x 4.49 x 4.02 inches
• Weight: 7.39 pounds
• Wattage: 1.4 KW
• Phase Type: Three Phase
• UPC: 747730043913
• Standards: Meets SAE J1171 and ISO 8846
• Included Components: Outboard Starter

Fitment

• 35-40 HP, 2 cylinder models
• 50 HP, 4 cylinder models

Replaces (OEM)

• Mercury 50-67341
• Mercury 50-58788A3
• Mercury 50-893891T
• Mercury 50-44369A1

Frequently Asked Questions

What Mercury outboard models does the Sierra 18-5602 starter fit? The Sierra 18-5602 fits Mercury outboard 35-40 HP 2 cylinder models and 50 HP 4 cylinder models.

Which Mercury part numbers does the 18-5602 replace? It replaces Mercury part numbers 50-67341, 50-58788A3, 50-893891T, and 50-44369A1, so any of these OEM numbers can be cross-referenced to Sierra 18-5602.

Is the Sierra 18-5602 a genuine Mercury part or aftermarket? The 18-5602 is an aftermarket Sierra starter engineered to meet or exceed the original Mercury equipment it replaces, not a Mercury-branded part.

How much does the Sierra 18-5602 starter weigh? The Sierra 18-5602 outboard starter weighs 7.39 pounds.

What are the dimensions of this starter? The Sierra 18-5602 measures 12.13 x 4.49 x 4.02 inches (length x width x height).

What marine standards does the 18-5602 meet? This starter meets SAE J1171 and ISO 8846, the standards covering marine electrical and ignition protection safety.

What features help the 18-5602 last longer than a worn-out starter? High quality magnets and field coils provide better starting torque, while double sealed housings and high quality brushes on the 18-5602 extend service life in a marine environment.

What is the wattage and phase type of the 18-5602 starter? The Sierra 18-5602 is rated at 1.4 KW and uses a three phase design.

Does the Sierra 18-5602 come with a warranty? Yes, the 18-5602 is covered under Sierra's customer satisfaction warranty like all Sierra parts.

What is included when I order the 18-5602? The order includes one Sierra 18-5602 outboard starter unit; no additional mounting hardware is specified.