806193A20 Gear Lube Monitor Bottle Reservoir for Mercury MerCruiser | JLM Marine

Gear Lube Monitor Bottle Reservoir for Mercury MerCruiser – 806193A20

This gear lube monitor bottle reservoir is engineered as a direct replacement for Mercury MerCruiser sterndrive applications, specifically Alpha Gen 2 and Bravo drive systems manufactured between 1988 and 1997. It provides reliable monitoring of gear oil levels to help prevent costly drive damage.

This kit directly replaces OEM part numbers 806193A20, 806193A48, and 19742A1, ensuring compatibility with your MerCruiser sterndrive unit.

• Complete reservoir kit with all necessary mounting hardware
• Includes float switch for accurate fluid level monitoring
• Direct fit for MerCruiser Alpha Gen 2 & Bravo drives (1988-1997)

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

This complete kit includes everything needed for installation:

• Reservoir Bottle
• Float Switch
• Mounting Bracket
• Mounting Strap
• Hardware (fasteners and fittings)

Installation Guide

1. Disconnect the battery and ensure the boat is on a level, stable surface before beginning work.
2. Remove the old reservoir assembly by disconnecting the electrical connector from the float switch and loosening the mounting hardware.
3. Carefully disconnect any fluid lines from the old reservoir, placing a drain pan underneath to catch residual gear lube.
4. Position the new reservoir bottle using the supplied mounting bracket and strap, aligning it to the factory mounting points on your sterndrive transom assembly.
5. Secure the bracket and strap with the provided hardware, ensuring the reservoir is level and firmly mounted.
6. Connect the fluid lines to the new reservoir, verifying that all fittings are properly seated and clamps are tight.
7. Install the float switch into the reservoir bottle and connect the electrical connector to the vessel's wiring harness.
8. Fill the reservoir with the manufacturer-recommended gear lube to the proper level as indicated on the bottle.
9. Reconnect the battery and verify that the float switch operates correctly by checking the instrument panel warning light.
10. Inspect all connections for leaks and verify proper mounting security before operating the vessel.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my MerCruiser drive?
A: This kit fits MerCruiser sterndrive models with Alpha Gen 2 and Bravo drives manufactured between 1988 and 1997. Verify your drive type and year, then cross-reference the OEM part numbers 806193A20, 806193A48, or 19742A1 with your current reservoir to confirm compatibility.

Q: What are the signs that my gear lube reservoir needs replacement?
A: Common signs include visible cracks or damage to the reservoir bottle, a malfunctioning float switch that doesn't trigger warning lights, leaking fluid from the reservoir or connections, or discoloration and brittleness of the plastic housing due to age and UV exposure.

Q: Does this kit include the float switch and all mounting hardware?
A: Yes, this is a complete kit that includes the reservoir bottle, float switch, mounting bracket, mounting strap, and all necessary hardware for installation.

Q: How often should I inspect or replace the gear lube reservoir?
A: Inspect the reservoir annually or during regular sterndrive maintenance intervals. Replace it immediately if you notice cracks, leaks, or if the float switch fails to function properly, as low gear lube can cause catastrophic drive damage.

Q: Is this an OEM part or aftermarket replacement?
A: This listing is an aftermarket replacement part engineered to meet or exceed OEM specifications for quality and performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping with competitive rates. Shipping times and costs vary by location and are calculated at checkout.

Q: What is your warranty and return policy?
A: This product includes a warranty against manufacturing defects. Please contact our support team for specific warranty terms and return policy details.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist, please contact us before purchasing.
• This product is an aftermarket replacement part.
• Professional installation is recommended to ensure safety and optimal performance.