Mercury – 100 Hour Service Kit | Alpha One Gen II Sterndrive | OEM Components | 8M0147055

Overview

Boaters who run Alpha One Gen II sterndrives know the feeling of dependability that comes from engines built to work season after season. Still, even the toughest systems need regular care to stay that way. The Mercury 8M0147055 100 Hour Service Kit brings together all the essentials you need to keep your Gen II drive running smooth, shifting clean, and staying protected from corrosion. It’s the kind of kit that lets you get in front of maintenance instead of chasing problems later—so when the water calls, your boat is ready without hesitation.

Key Features

• Complete 100-hour maintenance kit for Alpha One Gen II sterndrives
• Includes full sterndrive install gasket kit
• Aluminum anode kit provides strong corrosion protection
• Gearcase drain seals included for secure, clean gear lube changes
• OEM-engineered components for precision fit and long-term reliability

Engine & Boat Compatibility

• Fits MerCruiser Alpha One Gen II sterndrives from 1991 and newer
• Commonly found on runabouts, family bowriders, fishing boats, and classic sport boats
• Designed for both inland freshwater and coastal environments with proper anode selection

Performance & Practical Benefits

The Alpha One Gen II is known for its balance of strength and efficiency, and proper maintenance keeps it performing the way Mercury intended. This kit helps you refresh the essential sealing and protection components that guard your sterndrive against wear, corrosion, and water intrusion.

The gasket kit ensures every mating surface seals tight, giving you confidence when you throttle up or shift into gear. The aluminum anodes defend your drive from galvanic corrosion, a must-have whether you boat weekly or only a handful of times each season. And with the gearcase drain seals, your gear lube service becomes straightforward and leak-free, preserving smooth shifting and internal component life.

Everything in this kit is made to fit exactly right. No trimming, no guessing—just the right parts sliding into place the way they’re supposed to. When the service is done, you’ll feel the difference: a drive that runs steadier, shifts cleaner, and feels more secure in the water.

Why Buy OEM

When it comes to a sterndrive, fitment matters. Mercury OEM parts are engineered to match the exact specifications of your Alpha One Gen II system. Aftermarket alternatives can be tempting, but they often lack the precision and durability needed in a marine environment. With genuine Mercury components, you get parts that last longer, work better, and protect your investment. It’s the practical choice—especially if you plan to keep your boat for years.

FAQ

Q1: Which systems does the 8M0147055 kit fit?

It’s designed for MerCruiser Alpha One Gen II sterndrives built from 1991 and newer.

Q2: How is this different from aftermarket maintenance kits?

OEM parts deliver a precise fit and proven durability that aftermarket versions can’t consistently match.

Q3: How do I verify this is the right kit for my boat?

Check your sterndrive model—if it’s Alpha One Gen II, this is the correct 100-hour service kit.

Q4: Is it suitable for both saltwater and freshwater?

Yes. The included aluminum anodes provide reliable corrosion protection for mixed or saltwater use.

Q5: Can most boat owners install this kit themselves?

If you’re comfortable with basic maintenance tasks, this kit is very approachable with common hand tools.