New idler pulley set for Mercruiser v6 and v8 engines
This is the for a smooth pulley that is about 3 3/16 in diameter and a groved pulley that is about 4 1/4 in diameter.
4 1/4 groved pulley replaces part number 864625T
3 3/16 smother pulley replaces part numbers 8M6500024 865598