cylinder getting flooded at idle

9

97srxXT

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Joined
Dec 2, 2007
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147
Age
41
Location
Michigan
Swapped carb with a properly functioning cylinder and still the same outcome?? Swapped float, needle and seat before I swapped the carb as well with same outcome. I changed the O ring on the seats as well. Ready to blow this sled up. Is it possible for a fuel pump to push too much gas???
 
Throttle cable...?

The way the fuel pump works, it's impossible for it to feed more fuel to one carb vs another.
 
Are you sure it is actually flooding or do you see a wet spark plug as a result of the cylinder not firing at all? As suggested by Bluemonster, you need to check the compression in the problem cylinder. Also check to see the plug is actually producing a spark. I have had spark plugs that have looked perfect but would not produce a spark.

You have switched the carbs and the problem follows so the problem has to be with that cylinder and/or ignition circuit.

Jim
 
Cylinder is getting flooded as gas is coming out of the exhaust and the plug is completely clean on that cylinder along with the exhaust port.

Things I have checked/changed
compression is 125-130 on all 3 cylinders
Reeds I switched from a good cylinder to that one
Stator was swapped
coil was swapped
Did a leak down test and crank seals are both good


That cylinder will kick in at around 4000 rpms
Its getting spark the entire time (I have an inline spark checker)

logically if its not the reeds, It can only be the float sticking or wrong height (which I swapped needle seat and float from one of the other cylinders along with an entirely different carb) Or it could be the O ring on the seat, Which I put a new one on. Now logically I don't see the fuel pump causing the issue because the float should close and stop extra gas from getting in, But on this same cylinder my employee accidentally hooked up the vacuum/pulse line to the pto cylinder line out. Now what if in doing that it blew out the diaphragm and now that cylinder is getting air pushed out with gas and "pressurizing" the float bowl??? This sounds stupid to me, but its the only part I have not swapped.
 
did you check to see if the fuel pump is leaking in to the pulse line? I've seen this before.
 
IF that was the case it would be the center cylinder getting flooded I would think because when the lines got mixed up we had a gas line going to the pulse line and the center cylinder was flooded and shooting gas out the spark plug hole. I'm going to swap the fuel pump with my other sled and just see wtf happens, It has to be that as its the only thing left. I will let whoever cares know the outcome today or tomorrow.

Nick :o|
 
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