Idler pulley 864625T is for use on MerCruiser V6 and V8 (1998 and newer, 305, 350 & 377 CID) engines with serpentine belt requiring the 6-groove, 4.25 in. pulley. See your owner's manual, parts listing or service manual for exact application and installation instructions.

• Fits MerCruiser V6 and V8 (1998 and newer, 305, 350 & 377 CID) engines with serpentine belt requiring the 6-groove, 4.25 in. pulley
• See your owner's manual, parts listing or service manual for exact application and installation instructions
• Easy to install with common shop tools