Gear Lube Monitor Reservoir Bottle Kit – Fits MerCruiser Alpha Gen 2 & Bravo Sterndrive (Replaces 806193A48)
Gear Lube Monitor Reservoir Bottle Kit – Fits MerCruiser Alpha Gen 2 & Bravo Sterndrive (Replaces 806193A48) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gear Lube Monitor Reservoir Bottle Kit – Fits MerCruiser Alpha Gen ...
Product Details
This Gear Lube Monitor Reservoir Bottle Kit – Fits MerCruiser Alpha Gen 2 & Bravo Sterndrive (Replaces 806193A48) is a direct-fit replacement for MerCruiser Alpha Generation 2 (1991–1997) and Bravo series (1988–1997) sterndrives. It provides a reliable solution for monitoring your sterndrive's gear lube level, preventing costly damage from fluid loss.
It serves as a high-quality aftermarket alternative to Mercury/MerCruiser OEM part numbers 806193A48, 806193A38, 806193A20, 19742A1, 19743A3, and 19743A4.
- Mounts directly on the inner transom for straightforward installation.
- Includes an integrated low gear lube warning sensor that connects to the engine's audio alarm system.
- Features a right-facing nipple for connecting to the upper driveshaft housing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 806193A48 |
| Mercury/MerCruiser | 806193A38 |
| Mercury/MerCruiser | 806193A20 |
| Mercury/MerCruiser | 19742A1 |
| Mercury/MerCruiser | 19743A3 |
| Mercury/MerCruiser | 19743A4 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser applications, this kit is designed for the specific models and years listed. Verify your serial number for Alpha One Gen II drives to ensure proper fitment.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha One Gen II | 1991–1997 | 806193A48 | For serial numbers 0D491000 and above |
| MerCruiser | Bravo One | 1988–1997 | 806193A48 | |
| MerCruiser | Bravo Two | 1988–1997 | 806193A48 | |
| MerCruiser | Bravo Three | 1988–1997 | 806193A48 | |
| MerCruiser | Blackhawk | 1994–1995 | 806193A48 |
Technical Specs
- Product Type
- Gear Lube Monitor Reservoir Bottle Kit
- Installation
- Mounts on inner transom
- Connection
- Internal connection to upper driveshaft housing
- Housing Color
- Clear/Translucent (bottle) with Black mount
- Weight
- 0.58 kg (1.28 lb)
- Fitting Type
- Right-facing nipple (when looking at grooved side of bottle)
- Warranty
- Varies by manufacturer (OEM: 1 year)
- Other Technical Attributes
- Includes low gear lube warning sensor that connects to engine audio warning system
What’s in the Box
- 1 x Drive Lube Reservoir and Monitor (806193A46)
- 1 x Drive Oil Bracket (860065)
- 1 x Retaining Strap (808023)
- 2 x 1/4-10 x 1 Lag Bolt (10-59784)
- 2 x Washer (12-20346)
- 1 x Hose Clamp (54-41582-5)
Installation Notes
- Ensure the engine is off and the battery is disconnected before starting work.
- Locate the existing gear lube reservoir on the inner transom and disconnect the sensor wire and hose.
- Carefully unbolt and remove the old reservoir assembly.
- Position the new mounting bracket in the same location and secure it with the provided lag bolts and washers.
- Mount the new reservoir bottle onto the bracket and secure it with the retaining strap.
- Connect the hose from the upper driveshaft housing to the nipple on the bottle and secure with the hose clamp.
- Plug the low-level sensor connector into the engine's warning system harness.
- Fill the reservoir to the recommended level with the appropriate gear lube. Do not overfill.
- Reconnect the battery, start the engine, and check for any leaks or warning alerts.
Troubleshooting & FAQ
How do I know if this reservoir kit will fit my specific MerCruiser model?
This kit is designed for MerCruiser Alpha One Gen II drives (1991–1997, S/N 0D491000+) and Bravo series drives from 1988–1997. Please consult the 'Engine & Model Compatibility' table and cross-reference your OEM part number to ensure a perfect match.
What are the signs that my current gear lube reservoir needs replacement?
Common signs of failure include visible cracks or hazing on the plastic bottle, persistent leaks from the bottle or hose connection, and a malfunctioning low-level alarm that either won't turn off or fails to activate when the fluid is low.
How does the low lube warning sensor work?
The included sensor contains a float switch. When the gear lube level in the reservoir drops below a certain point, the float activates the switch, which completes a circuit and triggers the boat's audible engine warning alarm system.
Is this an OEM part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, where it is batch-inspected for consistency.
What are your shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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