Mercury – Quicksilver 815822A53 Complete Standard Rotation (RH) Gearcase | Alpha One Gen II Sterndrives | 1.47–1.94 Gear Ratios | 815822A53

Overview

Your Alpha One Gen II drive is built for performance, and when it’s time for a replacement, the Quicksilver 815822A53 Standard Rotation (Right-Hand) Gearcase gives you the same power, smoothness, and reliability that Mercury designed into the original.

Built for MerCruiser and Quicksilver Alpha One Gen II sterndrives with 1.47, 1.62, 1.81, and 1.94 gear ratios, this complete OEM gearcase restores strong acceleration, quiet running, and factory-level efficiency. Whether you’re repowering, upgrading, or replacing a worn lower unit, this gearcase installs easily and delivers years of dependable performance on the water.

Key Features

• Purpose: Direct OEM replacement gearcase that restores performance, handling, and reliability to your sterndrive.
• Fitment: For MerCruiser and Quicksilver Alpha One Gen II sterndrives with 1.47, 1.62, 1.81, or 1.94 gear ratios.
• Construction: Cast from XK360 low-copper aluminum alloy for superior strength and corrosion resistance.
• Finish: Protected by Mercury’s Tri-Paint system, creating a durable multi-layer barrier against salt and oxidation.
• Gears: Equipped with spiral-cut steel bevel gears for smooth, quiet operation and long service life.

Engine & Boat Compatibility

• Fits all standard rotation (RH) MerCruiser and Quicksilver Alpha One Gen II sterndrives
• Works across a wide range of gear ratios (1.47–1.94)
• Ideal for cruisers, runabouts, tow boats, and sport boats running single-drive setups

Performance & Practical Benefits

The 815822A53 brings back the effortless shifting, quiet running, and smooth torque delivery that make Mercury drives legendary. The spiral-cut steel gears are precision-machined to reduce vibration and gear noise while maximizing strength under heavy load. The XK360 alloy housing offers toughness and corrosion resistance that hold up to both fresh and saltwater use.

Mercury’s Tri-Paint finish gives this gearcase triple-layer protection — primer, epoxy, and polyurethane — ensuring it resists corrosion even in harsh coastal environments. Whether you’re cruising for hours or running hard with friends aboard, this OEM unit keeps your boat performing just the way it should.

Why Buy OEM

A gearcase isn’t a part you gamble on. Mercury’s OEM gearcases are built to exact factory tolerances and use materials specifically designed for marine stress, temperature, and torque loads. Every housing, bearing, and gear is manufactured to match the hydrodynamic profile and strength of the original drive.

Aftermarket replacements can look close, but small deviations in casting, gear hardness, or alignment can cause noise, vibration, or early failure. With genuine Quicksilver OEM, you’re getting the same design and quality used in new Mercury drives — proven durability, quiet performance, and a perfect fit every time.

FAQ

Q1: Which drives fit the Quicksilver 815822A53 gearcase?
A: It’s made for MerCruiser and Quicksilver Alpha One Gen II sterndrives using 1.47, 1.62, 1.81, or 1.94 gear ratios in standard rotation (RH).

Q2: What’s included in the assembly?
A: A complete standard rotation (RH) gearcase, fully built and ready for installation.

Q3: What’s the gear material?
A: Precision spiral-cut steel bevel gears, designed for smooth torque transfer and low noise.

Q4: Is it saltwater-ready?
A: Yes. The Tri-Paint system and XK360 low-copper alloy are specifically engineered to resist saltwater corrosion.

Q5: Do I need a mechanic to install it?
A: It’s recommended, though experienced owners with proper tools can handle installation. The case is a direct OEM replacement, so it bolts on cleanly.