MB55-7/8 V-Belt Pulley Single Groove | BK57-7/8 Sheave

MB55-7/8 V-Belt Pulley Single Groove | BK57-7/8 Sheave

Marsoni

M251S

$46.28

Get it in 3 business days with 1 day shipping. Friday, May 29

MB55-7/8 V-Belt Pulley Single Groove | BK57-7/8 SheaveThis MB55 7 8 V Belt Pulley features a single groove, ideal for efficiently transferring power from one belt to the next in drive systems. The BK57 7 8 Sheave offers reliable performance and durability in a variety of applications. Product Details : MB55 7 8 V Belt Pulley Single Groove BK57 7 8 Sheave Part No: MB55 7 8 Reference Number: BK57 7 8 Fixed Bore: 7 8" Outside Diameter: 5. 45" Belt Series: 4L A 5L B Groove: 1 Length Through Bore (LTB): 1 1

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Had everything I needed plus some extra parts in the kit. I probably could have just replaced the impeller for slightly less but while everything was disassembled you might as well replace the works. Included - Water Pump Impeller, Housing, Key, Face Plate, Face Plate Gasket, O-Ring, Seal Face and Carrier Assembly Oil Seal

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Reviewed in the United States on October 28, 2025

Verified Purchase

chris null

Carnegie, US

★★★★★ 5

Water impeller kit

Worked perfectly for my ‘02 Rinker Captiva 212 with the 5.7 Mercruiser Aloha one outdrive !

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Reviewed in the United States on October 9, 2025

Verified Purchase

Jmac

Port Orchard, US

★★★★★ 4

Good quality, but could have used better instructions

The kit was complete, and all the components were well made. However, if you aren't somewhat mechanical, it would be fairly easy to install the gaskets and backing plate in the wrong sequence. With better instructions, this would be a 5 star plus kit.

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Reviewed in the United States on July 31, 2025

Verified Purchase

ross

Natrona Heights, US

★★★★★ 5

Don't pay boat shops for over priced services!

Boat shop wanted $400 dollars for a new water pump replacement. Got this on Amazon and watched a few utube videos. Took less then 2hrs to take apart and replace. I put it in a Alpha 1 gen 2 lower. Very simple process.

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Reviewed in the United States on May 24, 2025