Starter Motor for Mercury Mariner Outboard 8-25HP 1980-2005
Starter Motor for Mercury Mariner Outboard 8-25HP 1980-2005
SKU:410-21024
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Starter Motor for Mercury Mariner Outboard 8-25HP 1980-2005
Mercury and Mariner 8, 9.9, 15, 18, 20 and 25HP outboards - 12V, CCW, 10-tooth
A starter motor is the component that cranks the engine over to begin combustion. If it fails to engage, spins without turning the engine, or does not respond at all when the key is turned or the start button is pressed, the engine will not start. This starter motor is built for Mercury Marine and Mariner outboard engines from 8HP to 25HP, engineered as a direct replacement that matches the original unit's fit, mounting and function.
It is a 12V permanent magnet direct drive (PMDD) unit with counter-clockwise (CCW) rotation and a 10-tooth drive pinion, with a motor housing length of 4.055in matching the original Mercury specification.
Key Features
- Direct fit for Mercury Marine and Mariner 8-25HP outboard engines
- Broad coverage across the 1980-2005 model years
- 12V starter motor, counter-clockwise (CCW) rotation
- 10-tooth drive pinion, PMDD design
- Motor housing length 4.055in
- 12-month warranty as standard
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Rotation | Counter-Clockwise (CCW) |
| Teeth | 10 |
| Starter Type | PMDD (permanent magnet direct drive) |
| Motor Housing Length | 4.055in |
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 / Mercury Outboard 8HP | 1986-1994 |
| Mariner / Mercury Outboard 9.9E, 9.9EH, 9.9EL | 1986-1990 |
| Mariner / Mercury Outboard 9.9ELRC | 1990-2000 |
| Mariner / Mercury Outboard 15EH, 15EL, 15ELH | 1992-2002 |
| Mariner / Mercury Outboard 20E, 20EL, 20EH | 1984-1998 |
| Mariner / Mercury Outboard 25E, 25EH, 25EL, 25ELH | 1980-2005 |
| Mercury Marine Outboard 8M and 18E variants | 1980-1990 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 50-893889, 50-893889T, 50-90983A1, 50-90983T1, 50-8M0033984 | Mercury Marine |
| SAB0053 | Arrowhead |
| 5724 | Lester |
| 18-5611 | Sierra Marine |
| MOT3000 | WAI |
| 112247 | Cargo |
| SM52160 | United Tech |
| 481935 | OEM / Interchange |
Frequently Asked Questions
Will this fit without modification?
Yes, this starter motor is built to match the original Mercury outboard unit's housing length, rotation and drive pinion, so it installs as a direct swap.
What's included?
One new 12V starter motor, ready to fit.
How do I know my old starter has failed?
Common signs are a single click with no crank, a slow or straining crank, or no response at all when the key is turned or the start button pressed.
How do I confirm this is the right starter for my outboard?
Check the motor housing length (4.055in) and 10-tooth drive pinion against your original unit, as Mercury used several housing lengths and tooth counts across its outboard range. Matching the Mercury part number in the cross reference above is the most reliable check.
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