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Volvo Mercruiser raw water pump conversion

B

Bt Doctur

Silver Medal Contributor
Finally Complete, all spacers will be machined from 3/4 round stock , 1 inch hose couplings/joiners/ splice .(3) , 6 hose clamps,
Dayco hose 71596 , original thermostat hose to pump is reversed and given a slight twist to join. From the original raw water inlet hose at the pump cut off the 1 1/4 end so its 3 inches long and save, cut off the 90 deg bend and discard, shorten the raw water inlet hose at #6 spark plug by removing 8 1/4 inches, and use hose splice to join and clamp.Install and clamp Dayco hose , install original thermostat hose reversed and join to Dayco hose with joiner/splice and clamp. Not shown is a ty-wrap holding the Dayco hose in place.,5th pic.
Power steering bracket lower adjuster slot cut and extended 1 -1/16 ,support plate on each side. Slight grinding mod to pump bracket to clear mounting bolt for plastic timing chain cover.
Mercruiser pully relieved to fit Volvo balancer snout, original nose bolt used with GM nose bolt washer.
1 inch longer manifold bolt and spacer for flush hose support.
















 
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Question:

Did you have enough space for a Johnson F9B-9 pump?
If so, why not use one in lieu of a belt driven pump?

Just curious!
 
If we omitted the center hatch board , the original configuration left much to desired because engineers and designers dont think ,they just do. Went thru 3 volvo pumps that leaked and a Johnson crank mounted one that lasted about a year and that started leaking.

I service 2 28 Wellcraft Coastals that still have their original pump bodies after 28 years , These can run with belt slack out to almost 1 1/2 inches and I never run tight belts on them. On average a 1 inch of slack. no leaks so figured I could do the conversion so I wouldnt have to spend time rebuilding the volvo pump bodies.

Aside from the cut and weld on the PS adjuster the average owner could do it themselves. The bracket is available for $79 , scrounge up a pump body on ebay for less than $100 , add a impeller kit 18-3150 and your done.

Who knows, maybe they`ll send me the pully and bracket to modify for a donation or burn it to a CD with the instructions
 
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