Starter Motor for Yamaha Outboard 40-50HP 1984-1988
Starter Motor for Yamaha Outboard 40-50HP 1984-1988
SKU:410-44036
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Starter Motor for Yamaha Outboard 40-50HP 1984-1988
Fits Yamaha Marine 40-50HP Outboards, 1984-1988 · Replaces Yamaha 6H4-81800-10
This starter motor is a direct-fit replacement for the Yamaha 40-50HP outboard, built to the same mounting, output and mechanical specification as the original equipment unit so it bolts straight into place.
It runs on 12 volts, turns counter-clockwise (CCW) and uses a 9-tooth drive gear, matching the specification of the starter originally fitted to these outboards. The drive gear engages the flywheel ring gear only while cranking and retracts once the engine fires, so no adjustment is needed after fitting. Fitting is a straightforward like-for-like swap: disconnect the battery, remove the mounting bolts securing the original starter, transfer the wiring connector across, and bolt this unit into place in the same orientation.
Key Features
- Direct OEM fit and function for Yamaha 40-50HP outboards
- 12-volt motor
- Counter-clockwise (CCW) rotation, 9-tooth drive gear
- Cross-references Yamaha 6H4-81800-10 and Lester 18345
- Marine-grade housing suited to outboard applications
- 12-month warranty as standard
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Rotation | CCW |
| Drive Teeth | 9 |
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 |
|---|---|
| Yamaha Marine 40-50HP Outboard | 1984-1988 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 6H4-81800-10, 6H4-81800-11, 6H4-81800-12 | Yamaha |
| 18345 | Lester |
| 410-44036 | J&N Electrical |
Frequently Asked Questions
Will this starter fit my outboard without modification?
Yes, provided your outboard is a Yamaha 40-50HP model from the 1984-1988 range, this starter bolts straight in. Cross-check the number on your original unit against the reference list above.
What's included?
The starter motor unit only, complete with its drive gear ready to fit.
How can I tell my old starter has failed?
Common signs include a clicking noise when you turn the key, the engine failing to crank, the starter freewheeling without turning the engine, or a burning smell from the motor.
Does the rotation direction matter?
Yes. This unit turns counter-clockwise (CCW) as viewed from the drive end, matching the original Yamaha outboard starter. A clockwise unit will not engage correctly.
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