Exhaust Bellows Expander Tool – Fits Mercury MerCruiser Alpha I/II, Bravo 1/2/3, and Blackhawk Stern Drives (Replaces 91-45497A1, 8M0096108)
This tool is designed specifically for the installation of exhaust bellows on MerCruiser stern drive units including MC-I, R-MR, Alpha One Gen 1, Alpha One Gen 2, Bravo 1, Bravo 2, Bravo 3, and Blackhawk drives.
Direct Replacements: Mercury/MerCruiser 91-45497A1/8M0096108, Sierra 18-9847, GLM 90360, Mallory 9-79811.
- Includes 1 exhaust bellows expander tool.
- Manual operation with scissor handle design.
- Compatible with multiple MerCruiser stern drive models.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand |
Part Number |
| Mercury/MerCruiser |
91-45497A1 / 8M0096108 |
| Sierra |
18-9847 |
| GLM |
90360 |
| Mallory |
9-79811 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here9s a guide to help you identify your engine9s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand |
Model |
Notes |
| Mercury |
MC-1 |
For exhaust bellows installation |
| Mercury |
R-MR |
For exhaust bellows installation |
| Mercury |
Alpha One (Gen 1) |
For exhaust bellows installation |
| Mercury |
Alpha One Gen 2 |
For exhaust bellows installation |
| Mercury |
Bravo One |
For exhaust bellows installation |
| Mercury |
Bravo Two |
For exhaust bellows installation |
| Mercury |
Bravo Three |
For exhaust bellows installation |
| Mercury |
Blackhawk |
For exhaust bellows installation |
Technical Specifications
| Specification |
Value |
| Product Type |
Exhaust Bellows Installation Tool |
| Installation |
manual operation with scissor handle design |
| Housing Material |
Steel |
| Handle Material |
Alloy Steel with Vinyl Grip |
| Tool Color |
Black |
| Weight |
0.6 kg (1.32 lbs) |
| Warranty |
180 days (HeuroFosh brand) |
| Other Technical Attributes |
Opens with screw lock mechanism |
Package Contents
- 1 x Exhaust Bellows Expander Tool (91-45497A1/8M0096108)
Installation Guide
- Place clamp over bellows end.
- Place exhaust expander tool into first bellow convolution.
- Pull on tool until it touches flange on bell housing, then release tool.
- Reposition tool into third bellows convolution.
- Pull bellows onto bell housing flange, insert straight rod and 'U' pin into tool.
- Note: Sterndrive must be removed in order to use this tool.
Troubleshooting & FAQ
Q: How do I confirm this fits my engine?
A: Check the compatible engine models list and use the Mercury Serial Number Guide link provided to verify your engine model and year.
Q: How often should I replace this tool?
A: This tool is designed for repeated use; replace it if it shows signs of wear or damage affecting functionality.
Q: Can this tool be used with non-MerCruiser drives?
A: It is specifically designed for MerCruiser stern drive units listed; compatibility with other brands is not guaranteed.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.