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Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One, Bravo, Blackhawk (Replaces 91-45497A1)
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- $41.50
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Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One, Bravo, Blackhawk (Replaces 91-45497A1)
This specialized tool is designed to stretch the exhaust bellows for installation on a wide range of MerCruiser stern drives. It is compatible with models including the Alpha One, Alpha One Generation II, Bravo One, Bravo Two, Bravo Three, Blackhawk, MC-1, and R/MR series.
This tool is a direct replacement for Mercury/MerCruiser part numbers 91-45497A1 and 8M0096108, Sierra 18-9847, GLM 90360, and Mallory 79811.
- Installation: Manual, scissor-type expander with a screw lock mechanism.
- Material: Constructed from high-strength steel for durability.
- Grip: Features a vinyl, anti-slip scissor handle for secure operation.
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 | 79811 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| Brand | Drive Type | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| MerCruiser | Alpha One | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | Alpha One Gen II | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | Bravo One | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | Bravo Two | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | Bravo Three | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | Blackhawk | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | MC-1 | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | R | Various | 4-Stroke | All | 91-45497A1 |
| MerCruiser | MR | Various | 4-Stroke | All | 91-45497A1 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Exhaust Bellows Expander Tool |
| Installation | Manual; Scissor-type with screw lock |
| Handle Type | Scissor handle with vinyl/anti-slip grip |
| Material | Steel |
| Application | Stretches exhaust bellows for installation |
| Compatible Drives | MerCruiser Alpha One, Alpha One Gen II, Bravo One, Bravo Two, Bravo Three, Blackhawk, MC-1, R/MR |
| Usage Notes | Stern drive must be removed before use |
| Country of Origin | USA (for MBS/OEM version) |
Package Contents
- 1 x Exhaust Bellows Expander Tool (Replaces 91-45497A1 / 8M0096108)
Installation Guide
Follow these steps to properly use the expander tool:
- Install the bellows onto the expander tool.
- Carefully pass the bellows through the vent hole in the transom.
- Once the bellows is in position, tighten the hose clamps securely.
Important: The stern drive must be completely removed before attempting to use this tool.
Troubleshooting & FAQ
Q: How do I use this bellows expander tool?
A: First, place the exhaust bellows onto the tool. Next, guide the bellows through the designated vent hole. Finally, tighten the hose clamps to secure it. Note that the stern drive must be removed prior to installation.
Q: Which MerCruiser drives is this tool compatible with?
A: This tool is designed for a wide range of MerCruiser stern drives, including Alpha One, Alpha One Gen II, Bravo One, Bravo Two, Bravo Three, Blackhawk, MC-1, and R/MR models.
Q: Do I need to remove the stern drive to use this tool?
A: Yes. The stern drive must be removed from the vessel before you can use this tool to install the exhaust bellows.
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.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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