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Jim Jim is offline
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First recorded activity by BoatBanter: Mar 2008
Posts: 113
Default Mercruiser Carb Conversion


"Jim Rojas" wrote in message
news:WX0Pj.1566$Ks1.1408@trnddc01...
It's a standard utility pump I pick up at Harbor Freight. It was only $40.
I can always replace it with a continous duty model at a later time. It is
cheap enough to carry a spare, or replace it every year. Heck, an impeller
kit is $40 anyway. This setup would only take several minutes to change
out if the pump fails.

Jim Rojas


Jim wrote:
Sorry. Carry on. When you said electric pump, I was thinking fuel pump.
The only caution I can think of is that the pump you are using might jam
or clog If it wasn't designed to pump dirty water.

"Jim Rojas" wrote in message
news:nISOj.1538$Ks1.1380@trnddc01...
I didn't replace the fuel pump, and don't have any plans to.

The choke circuit only activates the 30A relay. The pump itself is on a
separate 20 amp fuse on the battery selector switch.

I installed a temporary garden hose 2 way splitter on both ends of the
water pump. On the in side, one hose goes to the raw water inlet, the
other goes to a short hose to allow quick connection for flushing in my
driveway. On out side, one hose goes to the heat exchanger, and the
other goes to a 1/4 hose reducer that acts like a weep hole on an
outboard or jetski. This allows a visual indication at all times that
the electric pump is working.

Jim Rojas



Jim Rojas


Jim wrote:

"Jim Rojas" wrote in message
newsBJOj.1591$pn4.872@trnddc03...
Yeah...that I am an idiot...

The electric pump works great! I had to install a relay to activate
the pump. The relay is hooked up in parallel to the electric choke
circuit, so it will turn on/off when you turn the key.

Not such a good idea. You need to buy a oil pressure switch and power
the fuel pump from it. You also need to pull power from the starter
solenoid S terminal to run the pump while cranking the engine. I hope
your electric fuel pump is of the Coast Guard approved variety.



And it's certified ignition protected by the Coast Guard for use in enclosed
engine compartments , right?