Serpentine Belt Idler 3-3/16" Pulley for MerCruiser Stern Drive 865598 818382

Serpentine Belt Idler Pulley for MerCruiser

This serpentine belt idler pulley for MerCruiser stern drive engines is a direct replacement component that maintains proper belt routing and tension, and it matches OEM part numbers 865598 and 818382.

Overview

This serpentine belt idler pulley is built for MerCruiser stern drive applications and replaces OEM part numbers 865598 and 818382. It supports consistent serpentine belt operation by allowing the belt to track correctly around the accessory drive. This serpentine belt idler is intended for owners and technicians servicing compatible MerCruiser stern drive engines.

Built For Performance

• Replacement serpentine belt idler pulley for MerCruiser stern drive applications
• Compatible with OEM part numbers 865598 and 818382
• 3-3/16 inch pulley diameter for correct belt contact and routing
• Engineered for the accessory belt drive system on compatible MerCruiser engines
• Mounted as an idler to help maintain steady serpentine belt tension

Specs At A Glance

Good To Know

Q: Is this serpentine belt idler for MerCruiser stern drive applications? A: It is designed as a replacement for MerCruiser stern drive applications using OEM part numbers 865598 and 818382. Confirm the engine's original part number before ordering.

Q: What should be inspected before installing this pulley? A: Compare the original pulley diameter and bolt pattern to this 3-3/16 inch serpentine belt idler. Fit can vary by serial number, so verify compatibility before assembly.

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