DIRECT FIT / KEY SELLING POINT: A perfect, direct replacement for Mercury and Mariner 30-40 HP 4-stroke models from 1999 onwards, offering exceptional value and peace of mind.

Key Features

• ✔ Direct OEM Replacement: Engineered to perfectly match original specifications for Mercury and Mariner outboards.
• ✔ Robust 12-Volt Power: Delivers consistent and powerful cranking to fire up your engine.
• ✔ 9-Tooth Pinion: Ensures precise and reliable engagement with your engine's flywheel.
• ✔ Counter-Clockwise Rotation: Correct rotational direction for specified Mercury/Mariner models.
• ✔ PMDD Design: Permanent Magnet Direct Drive construction for efficient and reliable performance.
• ✔ Marine-Grade Durability: Constructed from high-quality materials to resist corrosion and wear in marine environments.

Technical Specs

Voltage:	12 Volts
Rotation:	Counter-Clockwise (CCW)
Teeth on Drive:	9
Starter Type:	PMDD (Permanent Magnet Direct Drive)
Gear OD:	1.654in / 42mm
Mounting Ear Holes:	8.1mm Unthreaded
Field Case Length:	4" / 101.6mm

Make	Model	Year Range
Mercury Marine	30HP 4-Stroke Outboards	1999-2009
Mercury Marine	40HP 4-Stroke Outboards (incl. EFI models)	1999-2009
Mariner Engine	30HP 4-Stroke Outboards	1999-2001
Mariner Engine	40HP 4-Stroke Outboards	1999-2001
Mercury Marine	40ELPT EFI 4-Stroke	2002-2009
Mercury Marine	40ELPT 4-Stroke	1999-2000

What Mercury and Mariner engines is this starter motor compatible with?

This starter motor is designed for Mercury and Mariner 30HP to 40HP 4-stroke outboard engines, primarily covering models from 1999 up to 2009. Please refer to our detailed fitment guide and OEM cross-reference for specific models and years.

What are the key technical specifications of this starter motor?

This unit is a 12-volt Permanent Magnet Direct Drive (PMDD) starter with a 9-tooth pinion that rotates counter-clockwise (CCW). It has a gear OD of 1.654 inches (42mm) and unthreaded 8.1mm mounting ear holes.

What does PMDD mean in a starter motor?

PMDD stands for Permanent Magnet Direct Drive. This design utilizes permanent magnets to generate the magnetic field, offering a compact and efficient starter that delivers reliable cranking power.

How do I know if my outboard starter motor is failing?

Common symptoms of a failing starter motor include the engine not cranking or cranking slowly, a grinding noise during start-up, or the starter spinning but not engaging the flywheel. Sometimes, other electrical issues like a weak battery or faulty solenoid can mimic starter problems.

Is this an OEM part?

No, this is a high-quality aftermarket replacement starter motor. Aftermarket parts are designed to meet or exceed the performance and durability of the original equipment manufacturer (OEM) part, often at a more competitive price. It is fully compatible and interchangeable with the OEM unit.