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

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

This bell housing installation gasket kit is designed for Mercury MerCruiser R/MR, Alpha One, and Alpha One Gen II sterndrives (1983 and newer) with serial numbers 6225577 and above. It provides the necessary seals to ensure a watertight connection between the sterndrive and the bell housing.

This kit is a direct replacement for Mercury part numbers 27-94996Q2 and 94996T2, as well as aftermarket parts from Sierra (18-2619, 18-2619-1), GLM (39622), Mallory (9-62601), and EMP (27-02386).

• Complete Sealing Solution: Contains all gaskets and O-rings required for installing the sterndrive unit to the bell housing.
• High-Quality Materials: Made from durable rubber and composite materials to ensure a long-lasting, reliable seal.
• Fuel Type Compatibility: Designed for use with gasoline-powered engines.

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 (27-8M0091545)
• 1 x Bell Housing Gasket (27-35982)
• 1 x O-Ring (25-33504) - 1.359" x 0.139"
• 1 x O-Ring (25-35027) - 1.046" x 0.139"
• 2 x O-Ring (25-29845) - 0.924" x 0.103"

Installation Guide

1. Safety First: Disconnect the boat’s battery before beginning work.
2. Drain Fluids: Drain the gear lube from the sterndrive completely.
3. Remove Drive: Detach and remove the sterndrive from the bell housing according to your service manual.
4. Remove Old Seals: Carefully remove and discard the old gaskets and O-rings.
5. Clean Surfaces: Thoroughly clean all mating surfaces on the sterndrive and bell housing. Ensure they are free of old gasket material, corrosion, and debris.
6. Install New Seals: Lightly lubricate the new O-rings with 2-4-C marine grease and install them in their respective grooves.
7. Position Gaskets: Place the new gaskets onto the bell housing, ensuring they are correctly aligned with the bolt holes.
8. Reinstall Drive: Carefully reinstall the sterndrive unit, ensuring proper alignment with the gimbal bearing and drive shaft.
9. Torque Bolts: Tighten the mounting nuts to the manufacturer-specified torque in the correct sequence.
10. Refill and Check: Refill the sterndrive with the recommended gear lube. Check for any leaks around the newly sealed area.

Troubleshooting & FAQ

How do I confirm this kit fits my MerCruiser drive?
Check your drive's model and serial number. This kit is specifically for MerCruiser R/MR, Alpha One, and Alpha One Gen II models from 1983 and newer with serial numbers starting from 6225577 and up. You can cross-reference your drive’s serial number with the ranges listed in the compatible models table.

What are the signs that my bell housing gasket needs replacement?
Common signs of a faulty gasket include finding water in your gear lube (milky-looking oil), a visible water leak dripping from the joint between the sterndrive and the bell housing, or gear lube leaking out.

Does this kit include everything I need for the installation?
Yes, this kit is comprehensive and includes the necessary mounting gaskets and O-rings to create a complete seal between the sterndrive and the bell housing for the specified models.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.