Mercury – V-Belt 39-1/2" | MerCruiser 3.0L Alpha One & MPI EC | Reinforced Marine Rubber | 862054Q

Overview
Every boater knows that sometimes it’s the simplest parts that carry the most responsibility. A good belt doesn’t demand your attention—it quietly does its job while you trim up, throttle forward, and enjoy the day on the water. With the Mercury Marine part number 862054Q V-Belt, you get that steady reassurance that your 3.0L MerCruiser is breathing, cooling, and charging the way it should. It’s the kind of reliability that lets you settle into a long run or ease into a narrow marina channel without a second thought.

Key Features

• Replacement V-belt measuring 39-1/2 inches in length

• Reinforced marine-grade rubber construction for long life and steady grip

• Matches the exact specifications of the original belt installed by MerCruiser

• Designed to maintain consistent tension for smooth accessory operation

• Fits both 3.0L Alpha One and 3.0L MPI EC engines within specified serial ranges

• Manufactured to Mercury Marine OEM standards for guaranteed performance

Engine & Boat Compatibility

• Fits MerCruiser 3.0L Alpha One engines, serial number range 1A002000–1A020543 and 1A020544 & up

• Fits MerCruiser 3.0L MPI EC engines, serial number range 1A072812 & up

• Ideal for runabouts, bowriders, deck boats, cuddy cabins, and smaller family cruisers

• Works with sterndrive accessory systems requiring a 39-1/2" V-belt

• Compatible with cooling, alternator, and accessory systems designed for traditional V-belt routing

Performance & Practical Benefits
A V-belt might not be glamorous, but you’ll feel its impact every time you turn the key. A fresh, properly sized belt means your alternator spins freely, your water pump circulates steadily, and your engine accessories keep rhythm without slipping or squealing. The 862054Q delivers a tight, confident grip on the pulleys, even as your boat transitions from idle to plane or pushes through choppy water.

The belt’s marine-specific rubber compound resists heat, moisture, and the constant strain of changing RPM. This longevity matters when your weekends take you far from the dock—or when you’re just looking to avoid surprise maintenance mid-season. Because it’s a Mercury Marine OEM component, the fit is exact. It seats easily, tensions predictably, and performs with the quiet steadiness that’s often missing from aftermarket options.

For many boaters, replacing the belt is part of routine upkeep, and this one installs smoothly with common tools. That easy fit, combined with the lasting durability, makes it one of those parts you can install with confidence and forget about until your next scheduled service.

Why Buy OEM
In the world of belts, small differences matter. Aftermarket belts may be close in size, but variations in rubber density, rib shape, or tension characteristics can create noise, premature wear, or accessory strain. The 862054Q is built to Mercury Marine’s exact specifications, ensuring a secure fit and proper performance across the full RPM range.

Choosing OEM means fewer surprises, fewer re-tensioning issues, and a much lower risk of slippage. It’s simply the most dependable choice for keeping a 3.0L MerCruiser running as it should. When you’re out on the water, trust counts—and OEM parts are built to earn it.

FAQ

Q1: Which engines does the 862054Q V-Belt fit?
It fits MerCruiser 3.0L Alpha One and 3.0L MPI EC engines within the specified serial number ranges.

Q2: What makes this belt better than aftermarket versions?
OEM belts match factory tension, material quality, and length, ensuring reliable grip and long-term performance.

Q3: How do I confirm it’s the right part for my setup?
Check your engine serial number and compare it with your owner’s or service manual specifications.

Q4: Can it be used in both freshwater and saltwater environments?
Absolutely. The belt is made from marine-ready materials designed for any water conditions.

Q5: Is installation straightforward?
Yes. Most boaters can replace this belt with basic tools and standard maintenance experience