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First recorded activity by BoatBanter: Jun 2007
Posts: 28
Default Mercruiser Carb Conversion

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.

 
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