Alternator Drive Belt 57-48122Q for MerCruiser 5.7 7.4 8.2 L Inboard Sterndrive

Alternator Drive Belt for MerCruiser

This alternator drive belt is a direct replacement for MerCruiser inboard and sterndrive engines, ensuring proper alternator operation. It matches OEM part number 57-48122Q and fits 5.7L, 7.4L, and 8.2L models.

Overview

The alternator drive belt for MerCruiser engines is a high-quality replacement component that keeps your charging system running smoothly. It is engineered to meet or exceed original specifications, providing reliable power transmission from the crankshaft to the alternator. Perfect for maintaining your boat's electrical system during regular service.

Built For Performance

• Rugged construction for long-lasting durability
• Resistant to heat, oil, and abrasion
• Exact dimensions for tension compatibility
• Ensures consistent alternator output

Fits These Machines

• for MerCruiser 5.7L Inboard Sterndrive
• for MerCruiser 7.4L Inboard Sterndrive
• for MerCruiser 8.2L Inboard Sterndrive

On-The-Job Use

• Replaces worn belts during routine engine maintenance
• Keeps alternator charging at full capacity
• Ideal for marine mechanics and DIY boat owners

Specs At A Glance

Good To Know

Q: How do I know if my belt needs replacement? A: Check for cracks, glazing, or squealing noises. If the belt feels loose or shows wear, replace it promptly.

Q: Is installation straightforward? A: Yes, with basic tools and a diagram, you can replace it following the tensioner procedure. Ensure the belt routing matches the original.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.