Engine dies when boat placed in water
08-10-2010, 02:32 PM
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Engine dies when boat placed in water
I am running a clutch and water pump in my 60 inch cat.When i crank it,it idles great,when i place her in the water she will die.I have to remove plug clear cylinder, rechoke it and recrank it.
08-10-2010, 02:59 PM
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RE: Engine dies when boat placed in water
You first must diagnose WHAT and WHY it is dying ... know it's what your asking, but we are not there and you are.
When it dies, Is plug wet and engine flooded ?
Does engine get water in it from the cooling system of exhaust couplers causing it to die ?
Is engine idling once on water or dies upon acceleration ? If dies upon placing in water betcha water leaking in at exhaust as pump primes cooling system .... dies upon acceleration, carb setting too lean on low end
When it dies, Is plug wet and engine flooded ?
Does engine get water in it from the cooling system of exhaust couplers causing it to die ?
Is engine idling once on water or dies upon acceleration ? If dies upon placing in water betcha water leaking in at exhaust as pump primes cooling system .... dies upon acceleration, carb setting too lean on low end
08-10-2010, 04:02 PM
#4
RE: Engine dies when boat placed in water
I think Scott nailed it. It sounds like if it runs fine out of the water and the minute you put it in.....water is getting pulled up thru the pumps and getting in the cylinders. So either a leak in the head but I'm guessing it might be your water cooled headers maybe.
I would double check all your connections and make sure everything tight.
Mike
I would double check all your connections and make sure everything tight.
Mike
08-10-2010, 04:34 PM
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RE: Engine dies when boat placed in water
ORIGINAL: KevinPC
Scott when i pull plug out ,and clear cylinder,water does shoot out when rope is pulled.
Scott when i pull plug out ,and clear cylinder,water does shoot out when rope is pulled.
Most common in damaged o-rings on header to engine mount or pipe to header coupler if a tuned pipe is being used
08-11-2010, 12:47 AM
#8
RE: Engine dies when boat placed in water
Bad diaphragm in the water pump? This could be drawing water up into the intake. Try bypassing it and block off the fitting on the isolator block where it connects.
Not trying to out-guess Scott but maybe just another possible cause.
Not trying to out-guess Scott but maybe just another possible cause.
08-11-2010, 10:32 AM
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RE: Engine dies when boat placed in water
ORIGINAL: Ron Olson
Bad diaphragm in the water pump? This could be drawing water up into the intake. Try bypassing it and block off the fitting on the isolator block where it connects.
Not trying to out-guess Scott but maybe just another possible cause.
Bad diaphragm in the water pump? This could be drawing water up into the intake. Try bypassing it and block off the fitting on the isolator block where it connects.
Not trying to out-guess Scott but maybe just another possible cause.
Good call Ron
08-11-2010, 10:18 PM
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RE: Engine dies when boat placed in water
Why not pull the water pickup lines and give it a quick shot once it's on the water to see if it still dies. If it does lean if it doesn't water leak. A quick shot on the water just to confirm and shut it down.
08-11-2010, 11:40 PM
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RE: Engine dies when boat placed in water
ORIGINAL: KevinPC
Thanks for all the help guys I found problem ,now fixed.again thanks
Thanks for all the help guys I found problem ,now fixed.again thanks
08-12-2010, 09:47 AM
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RE: Engine dies when boat placed in water
ORIGINAL: Scott Schneider
Thats great !! .... at least share what it was so others may learn
ORIGINAL: KevinPC
Thanks for all the help guys I found problem ,now fixed.again thanks
Thanks for all the help guys I found problem ,now fixed.again thanks
What he said.
I would like to know what is was also
08-12-2010, 02:52 PM
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RE: Engine dies when boat placed in water
Ya dont be a knuckle head like me and plumb the pump wrong i put the pressure line to head and theout hose to the iso block so water was going into carb.
08-12-2010, 04:07 PM
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RE: Engine dies when boat placed in water
ORIGINAL: KevinPC
Ya dont be a knuckle head like me and plumb the pump wrong i put the pressure line to head and theout hose to the iso block so water was going into carb.
Ya dont be a knuckle head like me and plumb the pump wrong i put the pressure line to head and theout hose to the iso block so water was going into carb.
Dave
08-12-2010, 07:35 PM
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RE: Engine dies when boat placed in water
ORIGINAL: KevinPC
Ya dont be a knuckle head like me and plumb the pump wrong i put the pressure line to head and the out hose to the iso block so water was going into carb.
Ya dont be a knuckle head like me and plumb the pump wrong i put the pressure line to head and the out hose to the iso block so water was going into carb.
08-12-2010, 10:29 PM
#18
RE: Engine dies when boat placed in water
Wanna talk newb mistakes? Not only did I mess up but just happened to take a pic of it not knowing at the time that I messed up.
I was trying to prime the carb and no fuel was coming up but the IV bag sure was filling with air!
Big learning day as I placed the engine where the previous owner had drilled the mounting holes at. The CG was about 3-1/2" too far forward.
I was trying to prime the carb and no fuel was coming up but the IV bag sure was filling with air!
Big learning day as I placed the engine where the previous owner had drilled the mounting holes at. The CG was about 3-1/2" too far forward.
