Bellow Retainer Ring Sleeve Installation Tool – Fits Mercury MerCruiser Alpha One Gen II, Bravo, Blackhawk (Replaces 91-818162)

Name: Bellow Retainer Ring Sleeve Installation Tool – Fits Mercury MerCruiser Alpha One Gen II, Bravo, Blackhawk (Replaces 91-818162)
Brand: JLM Marine
SKU: 21B1001
Price: 12.58 USD
Availability: InStock

Vendor: JLM Marine

Availability: In Stock

Product Type: Bellow

$12.58; $12.58
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Subtotal: $12.58

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Bellow Retainer Ring Sleeve Installation Tool – Fits Mercury MerCruiser Alpha One Gen II, Bravo, Blackhawk (Replaces 91-818162)

$12.58

Quantity:

Bellow Retainer Ring Sleeve Installation Tool – Fits Mercury MerCruiser Alpha One Gen II, Bravo, Blackhawk (Replaces 91-818162)

$12.58

Descripción
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Descripción

Bellow Retainer Ring Sleeve Installation Tool – Fits Mercury MerCruiser Alpha One Gen II, Bravo, Blackhawk (Replaces 91-818162)

This is a specialized installation tool for seating the aluminum retainer ring inside the U-joint bellows on various Mercury MerCruiser sterndrives. Made from high-grade steel, this tool is designed for press-fitting the ring to ensure a proper seal and secure fitment, preventing leaks and damage to the universal joint.

It is compatible with MerCruiser Alpha One Generation II, Bravo One, Bravo Two, Bravo Three, and Blackhawk drives. This component is a direct replacement for Mercury Marine part number 91-818162, Sierra 18-9870, and Mallory 9-79821.

Function: Specialized tool for installing the aluminum retainer ring into the U-joint drive shaft bellows.
Construction: Built from high-grade steel for durability and precise fitment.
Installation Method: Requires a compatible driver rod and installer tool for correct use.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM andbrands.

Brand	Part Number
Mercury Marine	91-818162
Mercury Marine	43577
Sierra	18-9870
Mallory	9-79821
SEI Marine	89-101-36

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury	Alpha One Gen II	120–300	4-Stroke	1992–Present	91-818162	Primary application
Mercury	Bravo One	250–500+	4-Stroke	1988–Present	91-818162	High-performance drives
Mercury	Bravo Two	300–500+	4-Stroke	1989–Present	91-818162	Heavy-duty applications
Mercury	Bravo Three	250–500+	4-Stroke	1988–Present	91-818162	Dual-prop configuration
Mercury	Blackhawk	300–500+	4-Stroke	1994–1998	91-818162	Surface drive system
Mercury	Vazer Drive	200–350	4-Stroke	1990–2000	91-818162	Limited production model
Sierra	18-9870	All Compatible	4-Stroke	1988–Present	18-9870	Direct OEM replacement
Mallory	9-79821	All Compatible	4-Stroke	1988–Present	9-79821	OEM equivalent quality
SEI Marine	89-101-36	All Compatible	4-Stroke	1988–Present	89-101-36	ISO9002 certified

Technical Specifications

Specification	Value
Product Type	Drive Shaft Bellow Sleeve Installation Tool
Installation	Specialized tool for installing aluminum retainer ring into U-joint bellows
Housing Material	High-grade steel construction
Dimensions	Approximately 89mm diameter x 25mm height (3.5" x 1")
Product Weight	150g
Package Dimensions	15cm x 10cm x 3cm
Package Weight	Approximately 0.45kg (1 lb)
Fitting Type	Precision-machined installation sleeve
Operating Temperature	Standard ambient conditions (-10°C to 50°C / 14°F to 122°F)
Other Technical Attributes	Requires driver rod and installer tool for optimal performance; ISO9002 certified manufacturing forversions

Package Contents

1 x Bellow Retainer Ring Sleeve Installation Tool (Replaces 91-818162)

Installation Guide

Ensure the sterndrive unit is safely tilted up and accessible.
Place the new U-joint bellows onto the gimbal housing.
Insert the aluminum retainer ring into the designated groove on the new bellows.
Position this sleeve installation tool evenly over the retainer ring.
Using a compatible driver rod, carefully apply pressure to drive the tool, seating the ring securely into the bellow's groove.
Once fully seated, visually inspect the ring to confirm it is flush and evenly installed.
Carefully remove the installation tool. The bellows is now secured.

Troubleshooting & FAQ

Q: How do I properly use this installation tool?

A: This tool is a sleeve designed to press-fit the aluminum retainer ring into the U-joint bellows. It must be used with a compatible driver rod. Place the sleeve over the ring and use the driver to apply even force, seating the ring correctly without damaging the bellows.

Q: Will this tool work on a sterndrive that is not a MerCruiser?

A: No, this installation tool is specifically designed for the MerCruiser models listed, including Alpha One Gen II, Bravo I, II, III, and Blackhawk drives. It is not intended for use with other brands like Volvo Penta or OMC.

Q: What other tools are required for a U-joint bellows replacement?

A: In addition to this sleeve, you will need a compatible driver rod, a bellows expander tool, adhesive/sealant, and standard mechanical tools for disassembling and reassembling the sterndrive components.

Q: OEM vs. Aftermarket?

A: This listing is anreplacement 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 anreplacement 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.

Envío

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Para nuestros clientes típicos de EE. UU. y Canadá , nuestros plazos de envío son los siguientes:

Amazon FBA : los pedidos se entregarán dentro de 1-5 días hábiles después de realizar el pedido (durante ciertos períodos especiales como promociones importantes, Navidad, etc., el tiempo de entrega de Amazon FBA puede verse afectado).
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Al realizar un pedido, estimaremos las fechas de envío y entrega según la disponibilidad de sus artículos y las opciones de envío que elija. Dependiendo del proveedor de envío que elija, las fechas de envío estimadas podrían aparecer en la página de presupuestos de envío.

Tenga en cuenta también que las tarifas de envío de muchos de los artículos que vendemos se basan en el peso. Puede consultar el peso de cada artículo en su página de detalles. Para reflejar las políticas de las empresas de envío que utilizamos, todos los pesos se redondearán a la libra superior.

Acerca de JLM Marine

Fundada en 2002, JLM Marine se ha consolidado como un fabricante dedicado de piezas marinas de alta calidad, con sede en China. Nuestro compromiso con la excelencia en la fabricación nos ha ganado la confianza de las principales marcas marinas a nivel mundial.

Como proveedor directo, evitamos intermediarios, lo que nos permite ofrecer precios competitivos sin comprometer la calidad. Este enfoque no solo promueve la rentabilidad, sino que también garantiza que nuestros clientes reciban el mejor valor directamente del proveedor.

Estamos entusiasmados de ampliar nuestro alcance a través de canales minoristas, llevando nuestra experiencia y compromiso con la calidad directamente a los propietarios de embarcaciones y entusiastas de todo el mundo.