M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset
M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset

M1786 Marine Starter Motor Mercruiser Volvo Penta OMC 3.0 4.3 5.0 5.7 GM Offset

6423N

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£159.99
/
Tax included.

M1786 Marine Starter Motor

Premium Quality Replacement for GM-Based Marine Engines

The M1786 is a high-performance Permanent Magnet Gear Reduction (PMGR) starter motor specifically engineered for harsh marine environments. This unit features a staggered (offset) mounting pattern, making it the correct fit for GM marine engines equipped with a 14-inch (168-tooth) flywheel. Its high-torque output provides reliable starting even in cold conditions or with high-compression engines.

RELIABILITY: Built to meet or exceed OEM specifications. Features an 11-tooth drive that provides smoother engagement and replaces older 9-tooth Delco 10MT versions.

Key Features

  • ✔ Permanent Magnet Gear Reduction (PMGR)
  • ✔ Staggered (Offset) Bolt Pattern
  • ✔ 11-Tooth drive for superior engagement
  • ✔ Sealed housing to resist corrosion

Technical Specs

Voltage 12V
Rotation Clockwise (CW)
Teeth 11
Pattern Offset / Staggered
Flywheel 14" (168 Tooth)

Compatibility / Fitment Guide

Application Engine Model Notes
Mercruiser 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, 8.2L GM Blocks with 14" Flywheel
Volvo Penta 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, 8.1L GI, GL, GXi, OSi Series
OMC Cobra 3.0L, 4.3L, 5.0L, 5.7L Offset Bolt Pattern Only

OEM Cross Reference

Mercruiser 50-806964A2, 50-806964A3, 50-812428A3, 50-812604A2, 50-863030A1
Volvo Penta 3587625, 3853982, 3854751, 3856004, 3860764
OMC 3854751, 3856004
Sierra / Arco 18-5913, 18-5913-1 / 30460

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 in marine environments.

How do I know if I need the "Offset" pattern?

Engines with a 14-inch (168-tooth) flywheel require this offset/staggered pattern. If your current starter has the two bolts diagonal to each other, this M1786 is the correct part. If they are straight across, you need the M1699/Straight pattern version.

Does this replace my older, larger 9-tooth starter?

Yes. This modern PMGR starter is smaller, lighter, and more powerful than the original Delco 10MT starters. The 11-tooth gear is designed to provide better engagement with the flywheel than the old 9-tooth design.

Note: Please verify your original part number or flywheel size against the references above before purchasing. Domain: 4Boats.co.uk

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