Gear Lube Monitor Reservoir Bottle for MerCruiser Alpha One Gen 2 & Bravo Gearcases

Product Details

This Gear Lube Monitor Reservoir Bottle is intended for MerCruiser Alpha One Gen 2 and Bravo gearcases. It provides the reservoir bottle used with the sterndrive gear-lubrication monitoring system and is suitable for replacing a damaged, cracked, leaking, or otherwise worn reservoir when the existing installation and fittings are serviceable.

The company fitment record covers all MerCruiser Alpha One Generation 2 and Bravo gearcases. Verify the gearcase style and the reference number on your original part before ordering.

• Single reservoir bottle; this listing is not a multi-component installation kit
• Designed for MerCruiser Alpha One Gen 2 and Bravo gearcases
• Useful as a replacement reservoir for the sterndrive gear-lube monitoring system
• Inspect the existing fittings, hose, mounting points, and monitoring components before installation

Part Number References

The following manufacturer reference numbers are listed for this product. Number listings are provided for identification and ordering comparison; always confirm the original part and application before purchase.

Engine & Model Compatibility

Fitment is specified by gearcase family rather than by a limited model-year range. Confirm that your sterndrive is an Alpha One Generation 2 or Bravo gearcase and compare the original reservoir before ordering.

Technical Specs

Product Type

Gear lube monitor reservoir bottle

Application

MerCruiser sterndrive gearcase lubrication monitoring system

Fitment

MerCruiser Alpha One Generation 2 and Bravo gearcases

Product Configuration

Single reservoir bottle

Reference Numbers

19742A1, 19742A3, 19743A3, 19743A4, 806193A20, and 806193A38

What's in the Box

This listing includes the reservoir bottle only.

• Gear lube monitor reservoir bottle

Float switches, brackets, straps, hoses, wiring, mounting hardware, and other installation components are not identified as included with this single-item product. Reuse or replace those components separately as required for your installation.

Installation Notes

1. Confirm that the replacement reservoir matches the original part and that the sterndrive is a MerCruiser Alpha One Gen 2 or Bravo gearcase.
2. Disconnect power as appropriate for the vessel and allow the sterndrive system to cool before beginning work.
3. Inspect the reservoir, hose connections, fittings, mounting points, and associated monitoring components before removal.
4. Remove the original reservoir according to the service procedure for your sterndrive installation, taking care not to damage the hose or connected components.
5. Transfer only compatible fittings or serviceable components required by your installation. This product does not include a bracket, strap, float switch, wiring, or other hardware unless separately supplied.
6. Install the replacement reservoir securely in the original position and reconnect the existing hose and monitoring connections.
7. Fill or top off the gear-lubrication system according to the manufacturer service procedure and use the lubricant specified for your drive.
8. Inspect all connections for leaks and confirm that the reservoir and monitoring system operate correctly before returning the boat to service.

Troubleshooting & FAQ

Which drives is this reservoir for?

The company fitment record specifies all MerCruiser Alpha One Generation 2 and Bravo gearcases. Confirm the drive family and compare the original reservoir and reference number before ordering.

Is this a complete reservoir installation kit?

No. This product is a single reservoir bottle. A float switch, mounting bracket, strap, hose, wiring, and installation hardware are not identified as included. Inspect your existing components and source any additional parts needed for your installation separately.

Does the reservoir include the float switch?

No float switch is listed as included with this single-item product. Reuse a compatible serviceable switch or obtain a replacement separately if required by your installation.

What reference numbers are associated with this product?

The listed manufacturer reference numbers are 19742A1, 19742A3, 19743A3, 19743A4, 806193A20, and 806193A38. Reference numbers should be compared with the original part and confirmed against the gearcase application before purchase.

What should I inspect before installation?

Check the reservoir connection points, hose condition, fittings, mounting location, wiring, and monitoring components for corrosion, cracks, leaks, or damage. Replace worn related components as necessary.

What gear lubricant should I use?

Use the marine sterndrive gear lubricant and service procedure specified for your particular MerCruiser drive. Consult the applicable owner’s or service manual for lubricant requirements and filling instructions.