A.A Gear Lube Reservoir Bottle with Sensor for MerCruiser 806193A51 / 8M0075708 — Direct-Fit, OEM-Compatible

A.A's replacement gear lube reservoir bottle with sensor fits MerCruiser models using part numbers 806193A51 and 8M0075708 to restore reliable fluid containment and low-level monitoring.

This OEM-compatible reservoir and integrated sensor assembly is made to replace worn or damaged MerCruiser gear lube tanks. It restores a sealed container for gear oil, helps keep lube free of contamination, and provides a refill/level monitoring interface when paired with the vessel's electrical system. The component ships ready to install and matches the mounting points and electrical connector pattern of the original parts to simplify swap-outs.

How does this replacement part match my MerCruiser setup?

The A.A unit duplicates the original reservoir shape, mounting tabs, and sensor connector so it aligns with the boat's stock hardware. It is engineered specifically to take the place of MerCruiser part numbers 806193A51 and 8M0075708 for straightforward compatibility.

• Direct fit form factor and mounting locations
• Compatible electrical connector for level/sensor signals
• Designed for standard marine gear lubricant types

What are the installation steps and what should I watch for?

Installation is a matter of draining the old reservoir, disconnecting the sensor wiring and hoses, swapping the unit, and refilling with the correct gear oil. Take care to follow torque specs on clamps, ensure hose fittings are clean, and test the sensor circuit before finishing the job.

• Drain gear lube to a safe container first
• Label or photograph hose routing and electrical connector positions
• Tighten clamps and check for leaks during a dock-side run

What performance or durability benefits will I see after replacing the reservoir?

Replacing a cracked or leaking reservoir prevents contamination and loss of lubricating fluid, reducing wear on lower-unit gears. The built-in sensor helps maintain awareness of fluid level so you can address low-oil conditions before they lead to more extensive repairs.

• Stops external leaks and contamination
• Restores level-monitoring functionality to the system
• Helps maintain optimal lubrication for gear longevity

Are there any maintenance tips to extend its service life?

Regular inspection, scheduled oil changes, and cleaning around hose fittings help the reservoir and sensor remain dependable. Replace hoses and clamps if they show aging to prevent stress on the reservoir and avoid premature failure.

• Inspect for hairline cracks or soft spots annually
• Use recommended marine gear oil and change per manufacturer intervals
• Replace aged hoses and corrosion-prone clamps during service

Who is this for: Boat owners and marine technicians who run MerCruiser lower units requiring parts numbered 806193A51 or 8M0075708, or anyone performing routine lower-unit maintenance and repairs. This A.A replacement is intended for people seeking a direct-fit, sensor-equipped reservoir to restore fluid containment and level monitoring without modifying the engine's original wiring or mounting points.