Sierra Starter Noseless Top Mount Rear Entry

Sierra 18-5603-1 MerCruiser Starter - Replaces 50-808011A05

Sierra high-quality starters are designed to meet OEM specifications. Sierra Marine starters are sealed to prevent water intrusion and corrosion. This starter features an improved housing that is designed to seal of the internal components from marine elements.

Features:

Rotation: Counter-Clockwise

Mount: Top

For use on GM & Ford Engines

Interchangeable With:

Arco

30459

Indmar

573001

Mallory

9-15908

Marine Power

0170-000

MerCruiser Stern Drive

50-17251A2

50-17251A3

50-47455

50-65784A1

50-76965A1

50-76965A3

50-76965A4

50-808011A05

50-808011A1

50-808011A3

50-808011A4

50-99419A3

Pleasurecraft

RA122009

Frequently Asked Questions

• What is the Sierra 18-5603-1 MerCruiser Starter used for? The Sierra 18-5603-1 is a marine starter designed for use on listed GM and Ford engines. It features counter-clockwise rotation and a top-mount configuration, and it replaces specified MerCruiser starter part numbers including 50-808011A05.
• What engine applications does the Sierra 18-5603-1 starter cover? The Sierra 18-5603-1 is specified for GM and Ford engines. The supplied description does not provide specific engine models, horsepower ratings, or year ranges, so verify your engine application and existing starter part number before installation.
• What are the rotation and mounting specifications of the Sierra 18-5603-1? The Sierra 18-5603-1 has counter-clockwise rotation and a top-mount configuration. Compare these specifications with the starter being replaced to help confirm that the replacement is appropriate for your application.
• How does the Sierra 18-5603-1 starter protect its internal components? The Sierra 18-5603-1 is sealed to prevent water intrusion and corrosion. Its improved housing is designed to seal the internal components from marine elements.
• What MerCruiser part numbers are interchangeable with the Sierra 18-5603-1 starter? The Sierra 18-5603-1 is listed as interchangeable with MerCruiser Stern Drive part numbers 50-17251A2, 50-17251A3, 50-47455, 50-65784A1, 50-76965A1, 50-76965A3, 50-76965A4, 50-808011A05, 50-808011A1, 50-808011A3, 50-808011A4, and 50-99419A3.
• What other starter part numbers interchange with the Sierra 18-5603-1? Additional interchangeable numbers include Arco 30459, Indmar 573001, Mallory 9-15908, Marine Power 0170-000, and Pleasurecraft RA122009. Verify the applicable part number and engine specifications before selecting a replacement.