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Author Topic:   Fuel Line Problems?

SWarren posted 03-13-2001 11:16 AM ET (US)
We were out in the montauk this weekend camping and the boat ran great all day Sat. Sunday it cranked up and ran fine for a while. Going about 4000 rpms it started cutting off. The boat had to be towed in. It started up and ran the rest of the day, about 430 in the afternoon it cut off again. The motor is a 90 yam. This was the second time it was in the water since Oct. It had about 5 gallons of gas in before it was filled up on Sat morn. Do yall think it was condensation (water) running through the motor or a bad coil? I dont think it would be major since it cranked up and ran all afternoon. Does anyone have and ideas?
Steve

triblet posted 03-13-2001 11:42 AM ET (US)
Could water, could be coil.
I don't think water, odds are you would have
had problems on Saturday.
Could also be:
Air leak at the fuel line QDs.
Junk in the tank covering the pickup
Loose electical connections in motor
or console.
Mmm, did you fill up after being towed in
the first time? Then I'd go looking for a
fuel pickup problem (How much gas was in the
tank at each failure? What tank?)
And check the fuel filter on GPs.
Chuck
tyler posted 03-13-2001 11:43 AM ET (US)
I have had a similar problem...come to find out the soder on the pipe that runs from the top of the gas tank to the bottom was comming apart. This caused the engine to suck air, causing the motor to foul out. Just a suggestion!
SWarren posted 03-13-2001 11:46 AM ET (US)
It has one tank the 27 gal pate tank. I filled up Sat and had problems on Sun. Ran about 5 to 8 miles on sat. Motor had new coil put in about a year ago.
Smitty posted 03-13-2001 07:42 PM ET (US)
I had this problem and it was the primer bulb.
SWarren posted 04-27-2001 10:53 PM ET (US)
Well it turns out that all of the possible solutions are wrong. The mechanic says that the thrid cylinder is burned out. Compression is 110,110.30. Something must have overheated the cylinder. I wonder why it would have ran fine and then the next day it messes up. It sounds like it sucked up some dirt and clogged the cooling system. Any ideas why it all of the sudden burn a cylinder out?
DIVE 1 posted 04-27-2001 11:02 PM ET (US)
Steve,
A lot of times when only one cylinder burns out it is due to too lean of a fuel system on the individual cylinder. Your cooling system is probably fine. I would bet that something was partially plugging your high speed carb jet for the particular cylinder.
Jim

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Author	Topic: Fuel Line Problems?
SWarren	posted 03-13-2001 11:16 AM ET (US) We were out in the montauk this weekend camping and the boat ran great all day Sat. Sunday it cranked up and ran fine for a while. Going about 4000 rpms it started cutting off. The boat had to be towed in. It started up and ran the rest of the day, about 430 in the afternoon it cut off again. The motor is a 90 yam. This was the second time it was in the water since Oct. It had about 5 gallons of gas in before it was filled up on Sat morn. Do yall think it was condensation (water) running through the motor or a bad coil? I dont think it would be major since it cranked up and ran all afternoon. Does anyone have and ideas? Steve
triblet	posted 03-13-2001 11:42 AM ET (US) Could water, could be coil. I don't think water, odds are you would have had problems on Saturday. Could also be: Air leak at the fuel line QDs. Junk in the tank covering the pickup Loose electical connections in motor or console. Mmm, did you fill up after being towed in the first time? Then I'd go looking for a fuel pickup problem (How much gas was in the tank at each failure? What tank?) And check the fuel filter on GPs. Chuck
tyler	posted 03-13-2001 11:43 AM ET (US) I have had a similar problem...come to find out the soder on the pipe that runs from the top of the gas tank to the bottom was comming apart. This caused the engine to suck air, causing the motor to foul out. Just a suggestion!
SWarren	posted 03-13-2001 11:46 AM ET (US) It has one tank the 27 gal pate tank. I filled up Sat and had problems on Sun. Ran about 5 to 8 miles on sat. Motor had new coil put in about a year ago.
Smitty	posted 03-13-2001 07:42 PM ET (US) I had this problem and it was the primer bulb.
SWarren	posted 04-27-2001 10:53 PM ET (US) Well it turns out that all of the possible solutions are wrong. The mechanic says that the thrid cylinder is burned out. Compression is 110,110.30. Something must have overheated the cylinder. I wonder why it would have ran fine and then the next day it messes up. It sounds like it sucked up some dirt and clogged the cooling system. Any ideas why it all of the sudden burn a cylinder out?
DIVE 1	posted 04-27-2001 11:02 PM ET (US) Steve, A lot of times when only one cylinder burns out it is due to too lean of a fuel system on the individual cylinder. Your cooling system is probably fine. I would bet that something was partially plugging your high speed carb jet for the particular cylinder. Jim