Yamaha 25-40HP 2-Stroke Starter Motor 12V 11T 689-81800-12
ERS1223
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Yamaha 25–40HP Starter Motor
12V | 0.6kW | 11-tooth | Counter-clockwise
A new aftermarket permanent-magnet direct-drive starter for selected Yamaha-built two-cylinder two-stroke outboards. It is configured for 12V operation, counter-clockwise rotation and an 11-tooth pinion, replacing Yamaha 689-81800-11/-12/-13 and equivalent Hitachi S108-80 family references.
Key Features
- Aftermarket replacement: New unit; not a Yamaha Genuine Part.
- PMDD design: Permanent-magnet direct-drive starter.
- 11-tooth drive: Must match the original flywheel/starter engagement.
- CCW rotation: Counter-clockwise as viewed under the starter convention used by the supplier.
- Broad cross-reference: Yamaha, Hitachi, Sierra, ARCO, API, Arrowhead and WAI numbers listed below.
Technical Specs
| Voltage | 12V DC |
| Power | 0.6kW |
| Starter type | PMDD |
| Rotation | Counter-clockwise (CCW) |
| Pinion | 11 teeth |
| 4Boats SKU | ERS1223 |
Compatibility / Fitment Guide
| Brand / family | Verified model examples | Year range |
|---|---|---|
| Yamaha 25HP | 25EL, 25ES, 25L, 25S | 1984–1985 |
| Yamaha 30HP | 30EL, 30ES | 1984–1986 |
| Yamaha C25 / C30 | C25ELH, C25ELR, C25MLH, C25MSH; C30ELR | Selected 1991–1997 variants |
| Yamaha C40 | C40ELR, C40ESH, C40MLH, C40MSH, C40PLR | Selected 1991–1997 variants |
| Yamaha CV series | CV25EL, CV25EML, CV30EL, CV40EL | Selected 1990 applications |
| Yamaha-built Mariner | Selected 20C, 25E/EL, 30E/EL and 40C/E/EL families | Approx. 1980–1990; confirm Mercury/Mariner OEM number |
Exclusions: Not for every Yamaha 25–40HP outboard, four-stroke engines, or starters using a different tooth count, rotation, mounting flange or electrical terminal layout.
Before ordering, compare the old starter label and housing, then verify the engine model code and serial number in the Yamaha or Mariner parts diagram.
Part Number Cross Reference
| Yamaha | 689-81800-11-00; 689-81800-12-00; 689-81800-13-00 |
| Hitachi | S108-80; S108-80A; S108-80B; S108-80BN |
| Mercury / Mariner | 50-814980M; 50-96359M; 50-97693M |
| Sierra / ARCO / Mallory | 18-6410; 3420; 9-15052 |
| API / Arrowhead / WAI | MOT5000 / MOT5000N; SHI0085 / 410-44088; 18310N |
| 4Boats SKU | ERS1223 |
Cross-reference numbers identify compatible applications; this is an aftermarket unit and is not supplied as an OEM Yamaha, Hitachi, Mercury, Sierra or ARCO starter.
Frequently Asked Questions
Will it fit every Yamaha 25–40HP engine?
No. Match the exact model/year and all electrical/mechanical specifications.
Is it a genuine Yamaha starter?
No. It is a new aftermarket replacement.
How many teeth does the pinion have?
Eleven.
What should be checked before installation?
Battery condition, cable voltage drop, solenoid operation, engine ground, flywheel ring gear and the cause of the original starter failure.
Can it convert a manual-start engine to electric start?
A starter alone is not a complete conversion kit. The engine must have the correct flywheel/ring gear, bracket, wiring, solenoid, charging and control components.
Disconnect the battery before work. Use the engine manual for installation torque and cable routing, and confirm correct engagement before extended cranking.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
