New Starter for Yamaha Marine 25HP 30HP 40HP 50HP 6F5-81800-11 6F5-81800-10
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Yamaha Marine Starter Motor 6F5-81800-11
Premium High-Torque Replacement Part
Upgrade your outboard's starting reliability with this heavy-duty 12-volt starter motor. Designed specifically for marine environments, this unit features a sealed housing to block out moisture and corrosion-resistant internals for a longer service life. Whether you are navigating fresh or saltwater, this motor delivers the consistent cranking power required for fast, efficient starts.
Key Features
- ✔ Direct fit OEM replacement
- ✔ Sealed housing for marine protection
- ✔ Precision 11-tooth drive gear
- ✔ High-torque PMDD design
Technical Specs
| Voltage | 12V |
| Rotation | Counter-Clockwise (CCW) |
| Teeth | 11 Teeth |
| Type | PMDD |
| Gear OD | 33.1mm (1.303") |
Compatibility / Fitment Guide
| Engine Type | Model/Horsepower | Year Range |
|---|---|---|
| Yamaha 2-Stroke | 25HP, 30HP | 1987 - 2012 |
| Yamaha 2-Stroke | 40HP, 50HP | 1984 - 1994 |
| Yamaha 4-Stroke | F8, F9.9 | 2001 - 2018 |
OEM Cross Reference
| Yamaha | 6F5-81800-10, 6F5-81800-11, 6J4-81800-00, 6J4-81800-01 |
| Hitachi | S108-87A, S108-123 |
| Sierra Marine | 18-6421 |
| Arco | 3423 |
| Arrowhead / J&N | 410-44085, SHI0131 |
| Lester | 18346, 18438 |
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 it is compatible?
Verify that your original part number matches any of the OEM Cross References listed above (e.g., 6F5-81800-11). Also, check that your motor is a 25-50HP model within the listed year ranges.
How many teeth does the drive gear have?
This starter motor features an 11-tooth pinion gear with a 33.1mm outer diameter, specifically designed to mesh perfectly with the Yamaha flywheel ring gear.
Note: All mentions of 4boats.co.uk are for reference only. Please verify your original part number against the references above before purchasing.
For the products under £150 the shipping is £6.99.
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