Mercury – Tensioner Belt Assembly | Verado Series | Cast Aluminum | 8M0101707

Overview

There’s a certain comfort that comes from running a Verado that’s been cared for the right way. You can hear it in the steady hum at idle and feel it when the boat lifts onto plane without hesitation. The belt system is a big part of that smooth, dependable feel—and when the tensioner starts aging, the engine lets you know in subtle ways. This Mercury Marine part brings that quiet confidence back. It’s built for the long haul, for long weekends offshore, and for boaters who expect their engines to perform every time they turn the key.

Key Features

• Provides proper belt tension for reliable electrical system support
• Cast aluminum construction for strength and structural stability
• Hard anodized finish to withstand harsh marine environments
• Includes bracket, two center-bonded mounts, and factory decal
• Engineered and tested to Mercury Marine’s original equipment standards

Engine & Boat Compatibility

• Fits Mercury L4 and L6 Verado outboards from 135 to 140 horsepower
• Designed for engines within serial range 1B227000–2B576734
• Common on offshore center consoles, multi-species hulls, bay boats, and premium recreational setups
• Ideal for Verado platforms requiring strong, consistent alternator support

Performance & Practical Benefits

You’ll feel the difference a healthy tensioner makes the moment your engine fires up. The belt stays tight and true, which keeps the alternator running at full efficiency. That means your power steering stays responsive, your electronics stay bright, and the whole motor runs with that signature Verado smoothness.

The cast aluminum body gives the assembly the muscle it needs to stay rigid under load, while the hard anodized finish protects it from salt spray, heat, humidity, and day-long run times. The bonded mounts help tame vibration, keeping everything secure but not stiff—just the right balance for a quiet, dependable ride.

This is the kind of part you install once and trust for years. No quirks, no mystery noises, no mid-season surprises. Just solid, predictable performance.

Why Buy OEM

When you’re maintaining a Verado, guessing isn’t an option. Aftermarket tensioners may look the part, but they often miss the engineering precision these engines demand. A genuine Mercury Marine part gives you perfect fitment, long service life, and the peace of mind that comes from knowing every component was designed to work as part of the system—not just bolt into it. It’s the dependable, real-world choice for anyone who values their time on the water.

FAQ Section

Q1: Which engines does the Mercury 8M0101707 tensioner fit?

It fits Mercury L4 and L6 Verado outboards in the 135–140 horsepower range, within serial numbers 1B227000–2B576734.

Q2: What makes this different from aftermarket versions?

It’s engineered specifically for Verado belt loads and electrical demands, ensuring proper tension and long-term durability.

Q3: How do I confirm it’s the correct replacement?

Match your serial number to the approved range or check your owner’s manual for verification.

Q4: Can it be used in saltwater?

Yes—its anodized aluminum construction is designed to thrive in both saltwater and freshwater environments.

Q5: Is installation straightforward?

Most mechanically experienced boaters can handle it, though many choose a technician to ensure perfect alignment.