Sierra 18-5612 Outboard Starter - Replaces OMC 432925, 586286, 586287 - Fits Johnson/Evinrude 150-175 HP

The Sierra 18-5612 is a replacement outboard starter built for Johnson and Evinrude outboards, delivering the cranking power needed to bring these engines to life reliably season after season. It is designed as a direct replacement for the original equipment starter, meeting or exceeding the performance of the part it replaces.

This starter is rated at 50 amps on a single-phase configuration, giving it the output required for the outboard models it is built for. It measures 12 x 4.5 x 4 inches and weighs 5.56 pounds, matching the footprint and mounting of the original starter it replaces so installation follows the same steps as removing and reinstalling the factory unit.

Sierra 18-5612 covers two distinct outboard applications: 150 HP and 175 HP 60-degree loopers from 1991-99, and 150 HP thru 175 HP V-6 outboards from 1997-03. It cross-references to Evinrude/Johnson starter numbers 586286 and 586287 as well as OMC 432925, so it is a straightforward swap for any of these original part numbers.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5612
• Item Type: Outboard Starter
• Amperage: 50 amps
• Phase Type: Single phase
• Weight: 5.56 pounds
• Dimensions: 12 x 4.5 x 4 inches
• UPC: 747730043999
• OEM Cross-References: Evinrude/Johnson 586286, 586287, OMC 432925, Arco 5391, Mallory 9-15032

Fitment

• 150 HP and 175 HP, 60-degree loopers, 1991-99
• 150 HP thru 175 HP, V-6, 1997-03

Replaces (OEM)

• Evinrude/Johnson 586286
• Evinrude/Johnson 586287
• OMC 432925
• Arco 5391
• Mallory 9-15032

Frequently Asked Questions

What outboards does the Sierra 18-5612 starter fit? It fits 150 HP and 175 HP 60-degree looper outboards from 1991-99, as well as 150 HP thru 175 HP V-6 outboards from 1997-03.

What OEM starter numbers does the 18-5612 replace? The Sierra 18-5612 cross-references to Evinrude/Johnson 586286 and 586287, as well as OMC 432925, making it a direct swap for any of those original starters.

Are there other cross-reference numbers for this starter? Yes, the 18-5612 also interchanges with Arco 5391 and Mallory 9-15032, in addition to the Evinrude/Johnson and OMC numbers.

How much does the Sierra 18-5612 starter weigh? It weighs 5.56 pounds.

What are the dimensions of the 18-5612 outboard starter? The unit measures 12 x 4.5 x 4 inches.

What is the amperage rating of the 18-5612 starter? It is rated at 50 amps on a single-phase configuration.

Is the Sierra 18-5612 a genuine OEM part or aftermarket? The 18-5612 is a Sierra aftermarket starter engineered to meet or exceed the performance of the original equipment starter it replaces.

Does the 18-5612 fit both the 60-degree looper and V-6 engine families? Yes, this single part number, Sierra 18-5612, covers both the 150-175 HP 60-degree looper outboards (1991-99) and the 150-175 HP V-6 outboards (1997-03).

What is included when I order the 18-5612? You receive one Sierra 18-5612 outboard starter, ready to install in place of the original unit.

Will the 18-5612 bolt in place of my original Evinrude/Johnson starter without modification? Yes, since it is a direct cross-reference for Evinrude/Johnson 586286, 586287, and OMC 432925, the 18-5612 is built to install using the same mounting as the original starter.