Starter Motor for Mercury Mariner & Yamaha Outboard 25-40HP 1998-2011
Starter Motor for Mercury Mariner & Yamaha Outboard 25-40HP 1998-2011
SKU:410-21028
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Starter Motor for Mercury Mariner & Yamaha Outboard 25-40HP 1998-2011
Mercury, Mariner and Yamaha 25, 30 and 40HP outboards - 12V, counter-clockwise, 9-tooth
This is a direct-fit replacement starter motor built to OEM specifications for Mercury Marine, Mariner and Yamaha outboard engines in the 25, 30 and 40HP range. It is a complete, ready-to-fit unit engineered to match the form, fit and function of the original equipment.
The unit runs on a standard 12-volt marine electrical system, turns counter-clockwise (CCW) and uses a 9-tooth drive pinion with a nut-design drive end. The field case measures 3.43in (87.1mm) and the drive gear outside diameter is 1.138in (28.9mm). Mounting is via one 9.0mm and two 8.0mm unthreaded holes, matching the original starter fitted to these outboard engines.
Key Features
- Direct OEM fit and function - no modification required
- Fits Mercury, Mariner and Yamaha 25-40HP outboards
- 12-volt marine starter motor, counter-clockwise (CCW) rotation
- 9-tooth drive pinion, nut-design drive end
- Field case 3.43in / 87.1mm, drive gear OD 1.138in / 28.9mm
- 12-month warranty as standard
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Rotation | CCW (Counter-Clockwise) |
| Teeth | 9 |
| Starter Type | PMDD (permanent magnet direct drive) |
| Drive End | Nut design |
| Field Case Length | 3.43in / 87.1mm |
| Drive Gear Outside Diameter | 1.138in / 28.9mm |
| Mounting Holes | 1 x 9.0mm, 2 x 8.0mm unthreaded |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model | Years |
|---|---|
| Mariner Outboard 25E, 25EH, 25EL, 25ELH, 25ELPT | 1998-2001 |
| Mercury Marine Outboard 25E, 25EH, 25EL, 25ELH, 25ELPT | 1998-2005 |
| Mercury / Mariner / Yamaha Outboard 30HP and 40HP | 1998-2008 |
| Yamaha Outboard 25HP | 1998-2011 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 50-830308-1, 50-830308T, 50-859169T, 50-888151T, 50-893886T | Mercury Marine |
| 65W-81800-00-00, 65W-81800-01-00, 65W-81800-02-00 | Yamaha |
| SAB0111 | Arrowhead |
| 18434, 5769 | Lester |
| 6767540, 6767540-M030SM, 7005840, SM67675 | United Tech |
Frequently Asked Questions
Will this starter motor fit without any modification?
Yes, this is a direct OEM-fit replacement for the listed Mercury Marine, Mariner and Yamaha outboard engines and requires no modification to install.
What is included in the box?
One complete starter motor unit, ready to fit in place of the original.
How do I know my old starter has failed?
Common signs include a clicking noise with no engine turnover, a slow or labouring crank, or no response at all when the key is turned or the start button is pressed.
Does this fit the earlier retaining-ring style drive end?
No, this unit uses the nut-design drive end. Please check your original starter's drive end style before ordering.
My engine is a Yamaha - will it still fit?
Yes. These powerheads were shared between Mercury/Mariner and Yamaha, and the starter carries the Yamaha 65W-81800 series numbers listed in the cross reference above.
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