Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One Gen I/II, Bravo 1/2/3, MC-1, R-MR, Blackhawk
This specialized marine tool is designed for installing exhaust bellows on MerCruiser sterndrive units. It simplifies the process by stretching the exhaust bellows through the exhaust hole in the bell housing, ensuring a secure installation on models including Alpha One (Gen I and Gen II), Bravo (1, 2, and 3), Blackhawk, MC-1, and R-MR.
This tool is a direct replacement for MerCruiser part numbers 91-45497A1 and 91-8M0096108/8M0096108, as well as several aftermarket equivalents.
- Installation Method: Manual operation with a scissor handle provides leverage to expand the bellows.
- Durable Construction: Made from steel with a black oxide finish for corrosion resistance.
- Enhanced Grip: Features an anti-slip function on the scissor handle for better control during use.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| MerCruiser | 91-45497A1 |
| MerCruiser | 91-8M0096108 / 8M0096108 |
| Mercury | 45497A1 |
| Sierra | 18-9847 |
| GLM | 90360 |
| Mallory | 79811 |








