Description
Mercruiser 575 SCi 256 Holley, Weiand, or B&M replacement idler pulley bearing. Fits inside 848091T.
If you need assistance in replacing this, please send it in to JB Performance. We can complete the replacement for less than 0.10 in labor.

Impeller nut- clockwise thread
Supercharger Needle Bearing Grease
Input shaft wave washer 52mm
Pulley bolt 1" long 