Sierra 18-5601 Outboard Starter, Replaces 50-55601, 50-55601A2, 50-38890A1, Fits Mercury/Mariner 35-50 HP Outboards

The Sierra 18-5601 is a 12 volt outboard starter motor built to replace the original starter on Mercury/Mariner outboard motors in the 35-50 HP range. It is designed as a direct replacement, meeting or exceeding the performance of the original equipment starter it takes the place of. The housing and internal components are metal construction for durability in the marine environment.

This starter is a straightforward swap for boat owners and marine technicians replacing a worn, weak, or failed starter motor on a compatible Mercury/Mariner outboard. Because it is sold under the Sierra 18-5601 part number, it can be ordered and cross-checked against the original Mercury part numbers it replaces, making it easy to confirm fitment before installing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5601
• Product Type: Outboard Starter
• Voltage: 12 Volts
• Material: Metal
• Weight: 5.82 pounds
• Dimensions: 10 x 6 x 6 inches
• Fits: 35-50 HP models

Fitment

• Mercury/Mariner outboard, 35-50 HP models

Replaces (OEM)

• 50-55601
• 50-55601A2
• 50-38890A1

Frequently Asked Questions

What does the Sierra 18-5601 starter fit? The Sierra 18-5601 fits Mercury/Mariner outboard motors in the 35-50 HP range.

What Mercury part numbers does the 18-5601 replace? It replaces Mercury part numbers 50-55601, 50-55601A2, and 50-38890A1.

Is the Sierra 18-5601 a genuine Mercury starter or an aftermarket part? It is an aftermarket replacement made by Sierra, engineered to meet or exceed the performance of the original Mercury starter it replaces.

What voltage is the 18-5601 starter? This is a 12 volt starter motor, the standard voltage for the Mercury/Mariner 35-50 HP outboards it fits.

How much does the Sierra 18-5601 weigh? The Sierra 18-5601 outboard starter weighs 5.82 pounds.

What are the dimensions of the 18-5601 starter? The unit measures 10 x 6 x 6 inches.

What material is the Sierra 18-5601 starter made of? The 18-5601 is made of metal construction, suited to the marine environment.

Will the 18-5601 work on any Mercury outboard? No, the Sierra 18-5601 is designed specifically for Mercury/Mariner outboards in the 35-50 HP range; other HP ranges use a different Sierra starter part number.

How do I confirm the 18-5601 is the correct replacement for my old starter? Check your existing starter or engine documentation for one of the OEM numbers 50-55601, 50-55601A2, or 50-38890A1; if it matches, the Sierra 18-5601 is the correct replacement.

What is included when I order the 18-5601? The order includes one Sierra 18-5601 outboard starter motor.