Crankshaft Mounted Raw Water Pump
 

Why are these not used on Merc? Seems alot easer to replace impeller and plumb.

My 29 scarab I had there wasn't enough clearnance in front of the pulleys. I had inches left before hitting the wood to the back seat.

I'm sure in a twin applicaition with the right access hatch it would be alot easier.

I think I might give it a try. I've got lots of room in front of the motors. Looks like I can get complete setups for around $175.00 ea.

They dont move as much water as a merc pump ..somtimes the plumbing can look kinda funky ...Prob main reason is the clearance issue as stated ...m

I use cam driven pumps. They work great for my 454 mags. Really cleaned up the engine and made it a lot easier to change impellers.

I ended up installing one on a 350 I set up with closed cooling. The Merc pump rebuilt did fine with keeping the block cool but wouldn't handle the exhaust cooling. I did one of the Volvo crank mounted pumps and it was able to pump enough water to do the block and heads where the Merc wouldn't.

Ive run them since 96 in miss river. Sandy and muddy most of the time. Changed impellers in 06 and they still looked new. No belt to jump off and over heat.

Ok so what's involved to convert over from Merc 3 piece or 2 piece to one of these units? Are they Jabsco & is it a tough conversion?