Bell Housing Installation Gasket Kit – Fits MerCruiser R, MR, and Alpha One Gen II (Replaces 27-94996Q2)

Bell Housing Installation Gasket Kit – Fits MerCruiser R, MR, and Alpha One Gen II (Replaces 27-94996Q2)

This comprehensive gasket kit includes all necessary components for installing the bell housing on MerCruiser R, MR, and Alpha One (Gen I & Gen II) sterndrive units. It is designed for boats manufactured from 1983 and newer, specifically for serial numbers 6225577 and above.

This kit serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a precise fit and reliable seal for your sterndrive maintenance or repair project.

• Installation Location: Mounts between the sterndrive bell housing and the transom assembly.
• Key Feature: Gaskets are designed to accommodate models equipped with a gear lube monitor port.
• Compatibility: Fits MerCruiser R, MR, Alpha One Gen I, and Alpha One Gen II drives (1983+, S/N 6225577 & up).

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

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.

Technical Specifications

Package Contents

• 1 x Outdrive Mounting Gasket (Replaces 27-35982)
• 1 x Bell Housing Gasket (Replaces 27-8M0091545)
• 1 x O-Ring (Replaces 25-33504, 1.359" x .139")
• 1 x O-Ring (Replaces 25-35027, 1.046" x .139")
• 2 x O-Ring (Replaces 25-29845, .924" x .103")

Installation Guide

A proper seal is critical for protecting your sterndrive assembly from water intrusion. Professional installation is recommended.

1. Safety First: Disconnect the boat's battery before beginning any work.
2. Remove Sterndrive: Detach the sterndrive (outdrive) unit from the bell housing according to your service manual's procedures.
3. Remove Bell Housing: Unbolt and remove the bell housing from the transom assembly.
4. Clean Surfaces: Thoroughly clean all mating surfaces on the transom and bell housing. Remove all old gasket material and corrosion.
5. Install New Gaskets: Carefully place the new gaskets and O-rings into their correct positions. Ensure they are seated properly without twisting or pinching.
6. Reinstall Bell Housing: Mount the bell housing back onto the transom, torquing the bolts to the manufacturer's specified values.
7. Reinstall Sterndrive: Reattach the sterndrive unit to the bell housing.
8. Check for Leaks: Once fully assembled, leak-test the installation in the water before extensive operation.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my MerCruiser drive?
A: This kit is specifically for MerCruiser R, MR, Alpha One Gen I, and Alpha One Gen II drives manufactured from 1983 onward with a serial number of 6225577 or higher. Drives made before 1983 or with lower serial numbers require a different gasket kit.

Q: My boat has a gear lube monitor. Is this the correct kit?
A: Yes, this gasket kit is designed to work with systems that have a gear lube monitor. It includes the necessary port and seals for that feature.

Q: What are the common signs that my bell housing gaskets have failed?
A: The most common sign of a failed gasket is water intrusion into the bilge area around the transom assembly. You may also find water in your gear lube, which indicates a more serious seal failure that requires immediate attention.

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.