Starter Drive for Mercury Outboard 90, 100, 115 & 125HP - 10-Tooth CCW
Starter Drive for Mercury Outboard 90, 100, 115 & 125HP - 10-Tooth CCW
SKU:220-21007
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Starter Drive for Mercury Outboard 90, 100, 115 & 125HP - 10-Tooth CCW
10-Tooth CCW Drive Gear for United Tech Starters
This starter drive gear is a direct OEM-quality replacement for the original fitted to United Tech starters used on Mercury Outboard 90, 100, 115 and 125HP engines. It engages the flywheel ring gear to turn the engine over on start-up, then disengages once the engine fires.
Manufactured to OEM specification with a sealed housing and premium materials, it is built for reliable, fast engine starts and backed by a 1-year warranty.
Key Features
- 10-tooth pinion, counter-clockwise (CCW) rotation
- Direct replacement for United Tech starters fitted to Mercury Outboard 90-125HP engines
- Includes retaining nut on the back of the drive
- OEM-quality construction with sealed housing
- 1-year warranty, dispatched from the UK
Technical Specs
| Specification | Detail |
|---|---|
| Part Type | Drive |
| Rotation | CCW |
| Teeth | 10 |
| Gear OD | 39.9mm |
| Gear ID | 13mm |
| Overall Length (OAL) | 36.6mm |
| Splines | 6 |
| Note | Includes nut on back of drive |
Vehicle Fitment Guide
| Make & Model | Years |
|---|---|
| Mercury Outboard 90HP | - |
| Mercury Outboard 100HP | - |
| Mercury Outboard 115HP | - |
| Mercury Outboard 125HP | - |
| United Tech starters (general fitment, see cross reference) | - |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 1090840 | United Tech |
| 1090840-DV30SM | United Tech |
| DV10908 | United Tech |
| 191-1036 | Onan |
| 191-1156 | Onan |
| SAB5312 | Arrowhead |
| 220-21007 | Arrowhead / J&N Electrical Products |
Frequently Asked Questions
Will this fit without modification?
Yes, this is a direct replacement drive gear for United Tech starters, no modification required.
What is included?
One starter drive gear with retaining nut.
How do I know my starter drive has failed?
Signs include the starter motor spinning freely without turning the engine over, grinding noises on start-up, or the pinion failing to engage the flywheel.
Does this fit my Mercury outboard?
Yes, this drive is used on United Tech starters fitted to Mercury Outboard 90, 100, 115 and 125HP engines. Please confirm your starter is a United Tech unit before ordering.
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