So I need a new Mercruiser raw water pump, since my old one appears to have eaten a little rock or something (just bought this boat used as-is). I think an electric pump might be a little more tolerant of seaweed and grains of sand and things, but I haven't heard of anyone else switching from the normal Mercury belt driven raw-water pump to an electric version.

This pump would probably pump enough cooling water, and it is less than half the price of the mechanical pump:
http://www.jamestowndistributors.com...FQKhOgod1HkAhw

Has anyone tried using an electric cooling water intake pump? Is that a really dumb idea?

Honestly I would continue using a belt driven seawater pump. I don't recall the exact number but I believe it's around 20gpm with a stock sea pump. Also there was a thread on here where a guy used a merc sea pump at 3000 rpm it moved a volume of water 30+ feet up a stand pipe. I don't think an electric pump could even come close to supplying the same amount of water.

Not to mention if that pump quits you won't know it until it gets hot. If you toss a belt you'll know it right away. The mechanical it tried and true.

Yeah,that pumps looks like it may work..........On a water cooled single cylinder lawnmower........Guy I know tried some kind of electric on a 5.0kw kohler generator because he was too cheap to buy proper replacement pump. Long story short ........Bad Idea......

3/4" hose barb, 4.5 gpm wash down pump ..yeah man that should work just great in a 1 1/4" hose system.. supply your motor and wash down the deck at the same time , SWEET!

Some reducers from Home Depot some garden hose..marine garden hose if possible of course ...and BOOM:






I`m picking myself up a electric supercharger, them 10-71 just rob too much power

Well it's better to ask a question like a dummy than ruin a big block engine like a dummy. Thanks guys, I'm gonna pick up a rebuild kit tomorrow.

that's a diaphragm pump. a bilge pump would be a better idea...and it is a bad one.

Geez guys take it easy. Clearly he is a newbie on the site and asked a simple question (stupid or not), no need to all line up to kick him in the mouth!

Hey guy, I to have been thinking about this idea. I like the idea of being able to let my motor warm up before I hit the water and I like the idea of being able to get close to the beach without worrying about sucking up sand. I could run my motor on the trailer without needing a water hose as long as I didn't let it run long enough to over heat.

Here is the pump I would use. Its also 1-1/4" inlet out let so you could pull your sea pump out and use a 90 degree hose to connect the inlet outlet together where your sea pump used to be then you could install this puppy a foot back or so where your sea water supply line is more straight. Only thing ide want to do is set my out drive in a bucket of water and hook this pump up in the boat and make sure it will suck the water through the out drive of course. I don't see using a high quality water pump any less reliable than the sea pump/sea pump belt or any other electrical device on your boat that could fail. I watch my gauges so ide know right away if my temp was climbing and or notice my lack of flow coming out the side of the boat.

http://www.summitracing.com/parts/em...bk14/overview/

Never mind that pump. I was able to get stewart componets on the phone. Everything about that pump is perfect EXCEPT that it will NOT create any suction to suck the water from the lake, through the out drive.