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Tim Tim is offline
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First recorded activity by BoatBanter: Nov 2006
Posts: 19,111
Default Mercruiser Carb Conversion

On Apr 21, 12:09*pm, "Jim" wrote:
"Tim" wrote in message

...
On Apr 21, 9:56 am, "Jim" wrote:





"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?- Hide quoted text -


- Show quoted text -


I can't say, but I doubt if it is. But then again. a lot of stuff on
boats isn't CC "aproved" from the factory.

I would have perhaps done things differently, but if he's satisfied
with how it works then I suppose that's fine. After all, we're talking
a runabout boat here.

I have to disagree with you here Tim. Runabouts can explode too. It could
happen in a crowded marina or a gas dock, or a raft up party etc. Innocent
people could be killed or injured because of an improperly maintained
runabout.- Hide quoted text -

- Show quoted text -


Oh, no doubt, Jim. and I'm not really discounting the idea that it's a
good thing. But it's amazing how many boats you'll find that have
google, jerry rigged things onboard.Again. I'm not saying it's a good
thing....

But if a person uses some common sense and has a decent knowledge
about spark/flame arresting, and can adapt to such, then there
shouldn't be a problem.