5.7 Mercruiser crank driven water pump conversion

[ehood]

Anyone done the conversion from the belt driven raw water pump to either the Volvo or the Johnson crank driven pumps? Searched a bit but didn't see anything. Seems like it would be the fix, no longer climbing over and under the motor especially for the starboard side pump.

 

[Mike Blake]

have them on my 7.4's when I bought the boat. The impellers are a 15 minute change.

 

[dpmulvey]

Copy/Paste from Offshore Only:

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<"...So now there is no reason to prefer the Mercruiser style over the newer crank driven pumps. The new high capacity pumps are # 10-24805-01 Mod # F6B-9. This pump is offered in a kit by Michigan Motorz and Jerry's Marine that includes a torque arm bracket that bolts to the block. Servicing this thing from the front is a snap because it's right on the front of the engine....plus there is no belt to break. Not to mention these pumps retail at less than half the price of the Mercruiser pump.

"

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http://www.amazon.com/Johnson-Pumps-10-24805-01-Extra-Crankshaft/dp/B003E21GUO

This I believe is the higher flow for the big blocks.

A Call to Johnson Controls could get you zeroed in.

 

[Lazy Daze]

Nothing wrong, at all, with changing over to the crank mounted pump. Don't forget you'll also need hoses so they can can fit to the new location.