Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One, Gen II, Bravo Series (Replaces 91-45497A1, 8M0096108)

$29.99

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Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One, Gen II, Bravo Series (Replaces 91-45497A1, 8M0096108) is backordered and will ship as soon as it is back in stock.

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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

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Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Exhaust Bellows Expander Tool – Fits MerCruiser Alpha One, Gen II, Bravo Series (Replaces 91-45497A1, 8M0096108) is designed for stretching and installing exhaust bellows on a wide range of MerCruiser sterndrive units. It is compatible with Alpha One, Alpha One Generation 2, Bravo One, Bravo Two, Bravo Three, Blackhawk, MC-1, R, and MR drive units from 1983 and newer.

This tool directly replaces Mercury part numbers 91-45497A1 and 8M0096108, as well as aftermarket equivalents like Sierra 18-9847 and GLM 90360.

Features a scissor-handle with a screw lock mechanism for manual operation.
Constructed from high-quality steel for durability.
Note: The Z-drive must be removed from the bell housing to use this tool correctly.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Mercury	91-45497A1
Mercury	8M0096108
Sierra	18-9847
GLM	90360

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This tool is designed for use on various MerCruiser sterndrive models as detailed in the matrix.

Brand	Model	Years	OEM Part No.	Notes
MerCruiser	Alpha One	1983–1990	91-45497A1	First Generation
MerCruiser	Alpha One Gen II	1991 and up	91-45497A1/8M0096108
MerCruiser	Bravo One	1996–2013	91-45497A1/8M0096108
MerCruiser	Bravo Two	1996–2013	91-45497A1/8M0096108
MerCruiser	Bravo Three	1996–2013	91-45497A1/8M0096108
MerCruiser	MC-1	1998–2009	91-45497A1/8M0096108	Integrated rear drive
MerCruiser	R	Various	91-45497A1/8M0096108
MerCruiser	MR	Various	91-45497A1/8M0096108
MerCruiser	Blackhawk	Various	91-45497A1/8M0096108

Technical Specs

Product Type: Exhaust Bellows Installation Tool
Installation: Manual Operation
Material: High-quality Steel
Handle Material: Steel with PVC Grip Cover
Design: Scissor-handle with Screw Lock Mechanism
Handle Style: Pliers-like with Non-slip Grip
Mechanism: Mechanical Expansion/Compression
Required Installation: Z-drive Must Be Removed to Use Tool

What’s in the Box

1 x Exhaust Bellows Expander Tool (91-45497A1/8M0096108)

Installation Notes

Install the exhaust bellows on the gimbal housing.
Use the tool to stretch the bellows through the exhaust hole in the bell housing.
Tighten the hose clamp securely.
Note: The Z-drive must be removed to use this tool.

Troubleshooting & FAQ

Which MerCruiser drives is this tool compatible with?

This tool fits MerCruiser Alpha One (including Gen II), Bravo (One, Two, Three), Blackhawk, MC-1, R, and MR sterndrive units manufactured from 1983 onwards.

Is it necessary to remove the sterndrive to use this tool?

Yes, the Z-drive must be removed from the bell housing before you can use this tool to install the exhaust bellows.

What OEM part numbers does this tool replace?

This aftermarket tool is a direct replacement for Mercury OEM part numbers 91-45497A1 and 8M0096108. It also cross-references to Sierra 18-9847 and GLM 90360.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, and expedited options may appear at checkout where available.

Warranty & returns

This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against your original part before purchasing. If anything differs, do not purchase, even if your model is listed as compatible.
This is an aftermarket replacement part, not an OEM component.
Professional installation is highly recommended for safety and optimal performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
Manufacturer-Direct Value — Our direct-sourcing model ensures fair pricing without compromising on materials or quality control.

Payment & Security

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