Mercury – Complete Alpha One Gen II Sterndrive | Alpha Series | Tri-Paint Corrosion-Resistant Finish | 51100008P

Overview

There are certain parts on a boat you learn to trust almost instinctively, and a sterndrive is one of them. When it is built right, you feel the difference every time you ease out of the slip, trim up onto plane or settle into a long cruise along open water. The Quicksilver Alpha One Gen II Sterndrive with a 1.47 gear ratio brings that steady confidence back into your boat—no hesitation, no surprises, just a smooth, sure connection between your engine and the water. Whether you are navigating a tight marina or running down the coastline at first light, it is the kind of drive that lets you relax and focus on the day ahead.

Key Features

• Complete standard-rotation sterndrive replacement for Quicksilver 350 MPI Alpha propulsion systems
• Tri-Paint protective coating creates a tough, multi-layer barrier against corrosion
• Constructed with XK360 low-copper alloy for enhanced durability in harsh marine environments
• Spiral-cut steel bevel gears engineered for strength and long wear
• Gear design refined for quieter, smoother operation
• Mercury Marine part number 51100008P

Engine & Boat Compatibility

• Designed for Quicksilver 350 MPI Alpha sterndrive engines
• Suitable for many runabouts, sport boats and family cruisers in the Alpha One Gen II lineup
• Ideal for single-engine applications where standard rotation is required
• Works well for recreational boating, coastal cruising and watersports

Performance & Practical Benefits

A good drive should feel solid and predictable, and that is exactly what this one delivers. The spiral-cut gears mesh smoothly, giving you that tight, clean shift you can feel through the throttle. Acceleration stays steady without vibration, and the drive holds firm even as you push into chop or load up the boat with crew and gear. The corrosion-resistant alloys and multi-layer coating help the drive shrug off salt, spray and long days in the water—so you spend more time boating and less time worrying about hidden wear.

Installation is straightforward, and once in place, the drive becomes one of those components you do not think much about because everything simply works. That reliability adds a layer of comfort, especially when you are miles from shore and relying on your equipment to bring you home.

Why Buy OEM

With a sterndrive, precision matters. Mercury’s original equipment drives are engineered to match the exact performance requirements of their engines, ensuring proper gear alignment, cooling flow and long-term reliability. Aftermarket options might cost less upfront, but they rarely match the longevity, material quality and engineering that an OEM component brings to the table.

Choosing a genuine Mercury Marine part means fewer surprises, easier maintenance and a drive that performs the way your engine was designed to run. It is the kind of decision seasoned boaters make without hesitation.

FAQ

Q1: Which engines does this sterndrive fit?

It is designed for Quicksilver 350 MPI Alpha sterndrive engines and other Alpha One Gen II applications requiring a 1.47 gear ratio.

Q2: What makes this sterndrive different from aftermarket versions?

The materials, coatings and gear engineering are purpose-built for Mercury systems, offering superior durability and smoother performance.

Q3: How do I know if this is the correct replacement?

Match your current drive’s gear ratio and confirm compatibility with your propulsion system using your owner’s manual or engine documentation.

Q4: Is it suitable for both saltwater and freshwater?

Absolutely. Its corrosion-resistant alloy and Tri-Paint finish are made for long-term exposure to harsh marine environments.

Q5: Is installation manageable for most boat owners?

Many experienced owners can install it, but sterndrive alignment is precise, so a certified technician is recommended for best results.