Skip to product information
1 of 8

Mercruiser Starter Motor 50-863007A1 4 6 8 Cyl 12V Marine OEM PMGR Staggered

Mercruiser Starter Motor 50-863007A1 4 6 8 Cyl 12V Marine OEM PMGR Staggered

SKU:6792BN

Regular price £119.00 GBP
Regular price Sale price £119.00 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.

Free shipping over £150. Terms apply

Genuine Mercruiser 12V Starter Motor

Reliable Marine Starting for 4, 6 & 8 Cylinder GM Engines | OEM Part 50-863007A1

Ensure reliable starting for your marine vessel with this Genuine Mercruiser 12V Starter Motor (Part Number 50-863007A1). Specifically engineered for a wide range of Mercruiser sterndrive engines, this starter is a direct OEM replacement designed to meet stringent Mercury Marine specifications. It's the ideal choice for maintaining the integrity and performance of your boat's power system.

This advanced Permanent Magnet Gear Reduction (PMGR) starter replaces numerous older units, offering superior efficiency and durability in harsh marine environments. Whether you have a 4-cylinder, V6, or V8 GM-based Mercruiser engine, this component provides the robust cranking power needed for confident starts every time. Don't compromise on quality; choose the trusted performance of an original equipment part.

DIRECT FIT / KEY SELLING POINT: Genuine OEM part for seamless installation and guaranteed compatibility with a broad range of Mercruiser GM-based engines.

Key Features

  • Genuine OEM Quality: Manufactured by Mercury Marine for perfect fit and long-lasting performance.
  • PMGR Technology: Latest Permanent Magnet Gear Reduction design for efficient, powerful starting.
  • Wide Compatibility: Fits 4, 6, and 8 cylinder GM-based Mercruiser sterndrive engines.
  • Marine Certified: Built to withstand harsh saltwater environments and SAEJ1171 marine safety standards.
  • Direct Replacement: Supersedes many older Mercruiser starter part numbers, simplifying replacement.

Technical Specs

Voltage: 12V
Pinion Teeth: 11-Tooth
Mounting Type: Bottom Mount, Offset Bolt Pattern
Flywheel Diameter: Designed for 14" Flywheel
Part Number: 50-863007A1
Brand: Mercruiser / Mercury Marine

Vehicle Fitment Guide

Make Model/Engine Type Year Range
Mercruiser 3.0L (4 Cylinder) Sterndrive 1999-2015
Mercruiser 4.3L V6 (incl. MPI engines) Mid-80s - Current
Mercruiser 5.0L (305 V8) Sterndrive All years with 14" flywheel
Mercruiser 5.7L (350 V8) Sterndrive / 350 Mag MPI All years with 14" flywheel
Mercruiser 6.2L (377 V8) Sterndrive / 377 Mag MPI All years with 14" flywheel
Mercruiser Big Block V8: 454, 496, 502 Mag Specific models, verify OEM part

OEM Part Number Cross Reference

Mercruiser 50-863007A1 (Current)
Supersedes / Replaces 50-806964A3, 50-806964A4, 50-806964A2, 50-12121A2, 50-864340R02, 50-864340A2, 50-77328A1, 50-812604A2, 50-822330A2, 50-99418A2, 50-12177A2, 50-812428A3, 50-864340R2, 50-99418R03, 50-806964R3, 50-99418R2, 50-77328A3, 50-807904A1, 50-863007R01
Sierra Marine 18-6275, 18-5913, 18-5905, 18-5900 (Equivalent Aftermarket)
OBR Red Rhino SR-399 (Equivalent Aftermarket)

Frequently Asked Questions

What engines is this Mercruiser starter motor compatible with?

This starter motor (50-863007A1) is compatible with a wide range of Mercruiser sterndrive engines, including 3.0L 4-cylinder (1999-2015), 4.3L V6, 5.0L V8, 5.7L V8, and 6.2L V8 GM-based engines that utilize a 14-inch flywheel and have a bottom-mount, offset bolt pattern.

Is this a genuine Mercruiser OEM part?

Yes, this is a genuine Mercury Marine factory OEM part, ensuring it meets the original equipment specifications for quality, fitment, and performance in marine applications.

Does the starter motor come with mounting hardware?

No, this starter motor does not include mounting hardware. If you are replacing an older unit, you may need to acquire new mounting bolts and nuts separately.

What type of starter technology does this unit use?

This is a Permanent Magnet Gear Reduction (PMGR) starter, which is the latest design used on many Mercruiser sterndrive engines, offering efficient and powerful starting capabilities.

Note: Please verify your bike's model and year before purchasing.
Fast shipping available across the UK and Europe.

View full details
Shipping calculated at checkout. Free shipping over £150. Terms apply