Outdrive Mounting Gasket Set – Fits MerCruiser R, MR, and Alpha Gen I, II (Replaces 27-94996Q2)

Outdrive Mounting Gasket Set – Fits MerCruiser R, MR, and Alpha Gen I, II (Replaces 27-94996Q2)

This outdrive mounting gasket set fits MerCruiser R, MR, and Alpha One/Gen II stern drives (serial numbers 6225577 and higher, from 1983 and newer).

It serves as a direct replacement for Mercury/MerCruiser part numbers 27-94996Q2 and 27-94996T2, along with several aftermarket equivalents, ensuring a reliable seal between the bell housing and the outdrive unit.

• Engineered for a direct fit to replace original bell housing gaskets and seals.
• Constructed from a durable, seawater corrosion-resistant rubber and paperboard composite.
• Provides a complete 6-piece gasket and O-ring set for a full installation.

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

6-Piece Gasket and O-ring Set (Replaces 27-94996Q2) Includes:

• 1 x Gasket
• 5 x Rubber O-rings

Installation Guide

1. Ensure the engine is off and the drive is trimmed to a safe, workable position. Disconnect the battery for safety.
2. Carefully remove the mounting nuts connecting the sterndrive to the bell housing.
3. Gently separate the sterndrive from the bell housing, taking care not to damage any cables or hoses.
4. Remove the old gasket and O-rings. Thoroughly clean both mating surfaces, ensuring they are free of old material, sealant, and debris.
5. Place the new gasket onto the bell housing, aligning it with the mounting studs.
6. Install the new O-rings into their designated grooves on the bell housing side.
7. Carefully guide the sterndrive back onto the bell housing, ensuring the drive shaft, shift shaft, and water tube align correctly.
8. Reinstall the mounting nuts and torque them to the manufacturer-specified values in the correct sequence.
9. Reconnect the battery. After launching, check for any signs of water or oil leaks around the seal.

Troubleshooting & FAQ

Q: How do I know if this gasket set will fit my MerCruiser drive?
A: This set is designed for MerCruiser R, MR, Alpha One, and Alpha One Gen II sterndrives from 1983 and newer, specifically those with serial numbers 6225577 and higher. Please verify your model and serial number against the compatibility table.

Q: What are the signs that my outdrive gasket needs replacement?
A: Common signs include water in your gear lube (milky-looking oil), oil leaking from the connection between the outdrive and bell housing, or visible corrosion and degradation of the old gasket during inspection.

Q: Is this a complete kit for installation?
A: Yes, this kit includes the primary gasket and all five necessary O-rings for mounting the outdrive to the bell housing for the models listed.

Q: How often should the outdrive mounting gasket be replaced?
A: It is standard practice to replace the gasket and O-rings every time the outdrive is removed for service to ensure a proper, leak-free seal upon reinstallation.

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.