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.

Front Rotor Seals
Mercruiser 525/575 SCi 256, Weiand, Holley, B&M Idler Tensioner Pulley Blue 10 Rib 848091T / 6899
JB Performance Supercharger Oil with Stage 3 Technology 8 ounce bottle.
Permatex Anaerobic Gasket Maker 518
Weiand, Holley, B&M drive snout spring 841270 / 6998, G2 drives 