Mercury – Quicksilver Crankshaft Pulley | For V6 & V8 MerCruiser Engines (305, 350, 377 CID) | 807730T

Overview

A good crankshaft pulley does more than spin a belt — it keeps your entire accessory drive system running smooth and in sync. The Mercury 807730T Quicksilver Crankshaft Pulley is built for V6 and V8 MerCruiser engines (305, 350, 377 CID) from 1998 and newer that use a serpentine belt setup. It’s precision-machined to transfer power cleanly from the crankshaft to your alternator, steering pump, and water pump without the wobble, squeal, or vibration that comes from worn parts. Durable, corrosion-resistant, and built to Mercury’s tight tolerances, it’s the kind of part you install once and trust for years.

Key Features

• Purpose: Transfers crankshaft power to engine accessories through the serpentine belt.
• Fitment: Designed for V6 and V8 MerCruiser sterndrive and inboard engines (305, 350, 377 CID; 1998 and newer).
• Construction: Made from marine-grade, corrosion-resistant metal for strength and long life.
• Precision: Balanced for smooth, vibration-free rotation under load.
• Installation: Bolts on easily with standard tools for quick replacement.

Engine & Boat Compatibility

• MerCruiser V6 and V8 engines (305, 350, 377 CID)
• Model years: 1998 and newer
• Drive Type: Serpentine belt systems

Performance & Real-World Benefits

When your pulley’s in good shape, you’ll feel it — the belt runs quietly, tension stays steady, and your accessories work like they should. The 807730T pulley restores that factory-smooth performance by eliminating slippage, noise, and imbalance caused by old or corroded pulleys.

Built from high-quality, marine-grade material, it won’t rust, warp, or crack like cheaper cast versions. Each pulley is machined and balanced to maintain perfect alignment and belt contact, which means better power delivery, less wear on bearings, and fewer headaches down the line.

Whether you’re idling into the marina or throttling up in chop, this pulley keeps your system tight, quiet, and efficient — exactly how it was meant to be.

Why Choose Mercury OEM

The Quicksilver 807730T is a genuine Mercury Marine replacement, engineered specifically for MerCruiser engines. Aftermarket pulleys might look similar, but small differences in weight, size, or finish can throw off balance or shorten belt life.

Mercury’s OEM pulleys are precision-machined and coated to handle constant vibration, heat, and exposure to saltwater. They’re the same parts Mercury technicians use in new builds and rebuilds alike — because they fit right, run true, and last.

FAQ

Q1: What engines does this fit?
It’s made for V6 and V8 MerCruiser engines (305, 350, 377 CID) from 1998 and newer using serpentine belts.

Q2: What does the pulley drive?
It powers your alternator, water pump, and steering pump through the serpentine belt.

Q3: Why replace it?
Over time, pulleys can corrode, warp, or throw off balance, leading to belt noise, wear, or loss of power.

Q4: Is it easy to install?
Yes — it’s a direct OEM fit and installs quickly with basic tools.

Q5: Why OEM instead of aftermarket?
Because Mercury OEM pulleys are built to exact specs for your engine — ensuring smoother operation, longer belt life, and a perfect fit every time.