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.

Supercharger Needle Bearing Grease
Rear Rotor Seals
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Mercruiser 525/575 SCi 256 Weiand, Holley, B&M idler Tensioner Arm Assembly Black 10 Rib 841271 / 6080WND
Front Drive Snout Seal
Mercruiser 525/575 SCi 256, Weiand, Holley, B&M Idler Tensioner Pulley Blue 10 Rib 848091T / 6899 