MERCRUISER (4/6/8 CYL) 12V STARTER MOTOR 50-863007A1 - 4Boats

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£119.00

Tax included.

Mercruiser Starter Motor 50-863007A1

Name: Mercruiser Starter Motor 50-863007A1 3.0 4.3 5.0 5.7 6.2 7.4 8.1 8.2 12V PMGR
Price: 119.0 GBP
Rating: 5 (1 reviews)

High-Torque PMGR 12V Marine Starter

This premium quality replacement starter motor is designed for high-performance cranking in marine environments. Specifically engineered for MerCruiser 4, 6, and 8-cylinder engines, this PMGR (Permanent Magnet Gear Reduction) unit provides superior torque and reliable starting even under heavy load. It features marine-grade seals and corrosion-resistant materials to withstand harsh saltwater and freshwater conditions.

RELIABILITY: Built to meet or exceed OEM specifications. This modern PMGR design replaces older, heavy direct-drive starters with a more efficient, high-output alternative.

Key Features

✔ Permanent Magnet Gear Reduction (PMGR)
✔ 11-Tooth Pinion for efficient engagement
✔ Offset (Staggered) 2-bolt mounting pattern
✔ SAE J1171 Marine Certified ignition protection
✔ Direct fit for 14-inch flywheels

Technical Specs

Voltage	12V
Power	1.7 kW
Rotation	CW (Clockwise)
Teeth count	11 Teeth
Mounting Type	Bottom Mount (Offset)

Compatibility / Fitment Guide

Engine Application	Year Range	Notes
MerCruiser 3.0L / 181ci	1999 & Newer	Fits 4-Cylinder models
MerCruiser 4.3L V6	Mid-80s to Current	Includes Carb & MPI models
Small Block V8 (5.0L, 5.7L, 6.2L)	Late Model	Fits 305, 350, 377 MAG MPI
Big Block V8 (7.4L, 8.1L, 8.2L)	Various Years	Fits 454, 496, 502 Mag

OEM Cross Reference

Mercury / MerCruiser	50-863007A1, 50-806964A2, 50-806964A3, 50-806964A4, 50-807904A1, 50-812428A3, 50-812604A2, 50-822330A2
Sierra Marine	18-6275, 18-5913, 18-5905, 18-5900
Arco Marine	30470, 30450, 30433
Volvo Penta / OMC	3860566, 3855177, 3850525, 3860764, 3857747
Delco	9000839, 9000840, 9000884, 9000885

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.

How do I know if it is compatible?

We recommend checking the SKU/MPN and Cross Reference list provided above. This unit fits late-model GM engines with an offset (staggered) bolt pattern and a 14-inch flywheel.

What is a PMGR starter?

PMGR stands for Permanent Magnet Gear Reduction. These starters are lighter and provide more cranking torque than older direct-drive units, making them more efficient for starting large displacement marine engines.

Note: Please verify your original part number or mounting bolt pattern against the references above before purchasing. Domain: 4boats.co.uk.

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Mercruiser Starter Motor 50-863007A1 3.0 4.3 5.0 5.7 6.2 7.4 8.1 8.2 12V PMGR