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Super A carburetor flooding #1 cylinder

C

CBradford

New User
What's causing a Super A to flood the cylinders while trying to start.? gas comes out of muffler connection at manifold?
 
Things that could cause that.
#1 dirt/rust in the needle seat,
#2 stuck float.
#3 bad float.
#4 float set wrong.
#5 your choking it way to much
 
Is it not starting?

It's kinda' hard to truly flood an updraft system. A flooding carb will drip gas continually when the gas valve is open.

Too much choke can somewhat flood one, but seeing gas drip following a failed start is normal.

If it fails to start, and the plugs are wet with gas, weak or no spark would be the next thing to check. Low compression can also be a factor, especially if it has been stored for a while. Try a teaspoon of oil in each cylinder to seal the rings and get oil to the cylinders.
 
(quoted from post at 05:40:22 10/19/22) Lots more information needed......
Click to expand...
I tried cranking it Sunday after it sit up since April. Opened gas valve tried starting it. It would turn over good but would not crank, tried pulling choke while cranking it. After a few attempts at cranking it gas was coming out of where muffler bolts to manifold, Pull spark plug, gas in cylinder. All plugs firing, pulled carburetor clean carburetor good, set float, cleaned needle and seat. Put carburetor back on and tried cranking it again. Done the same thing
 
If you have a good connection at the air cleaner,
and the weep hole in the bottom of the carburetor is
plugged, you cant see when the carb is filling with
fuel in the wrong places. Remove the air cleaner
connecting hose, shut the fuel off and let it dry out
for awhile. While youre waiting, remove the spark
plugs and give the cylinders a couple shots of oil;
sounds like you got enough gas up there to wash
the cylinder. Leave the fuel tap turned off for the
initial start. After it stops from lack of fuel, open the
tap and let it sit for awhile to see if the carb starts
leaking again. Possibly a one-time failure, or you
have dirt stuck in there somewhere.
 
Check the oil level if over full, and smelling of gasoline, there are issues that need attention. If the fuel
shutoff valve was left on the engine can be filled with gasoline. The gravity feed fuel system can leak
through the carb and fill the manifold and run into the cylinders. Operating it with contaminated oil will
ruin the lower end rapidly. jim
 
So you are saying that when you took the carburetor off to clean it, you got approximately a quart of gasoline in your lap?

So you are saying when you pulled the #1 plug and cranked the tractor over, gasoline SQUIRTED out?

It takes a lot of gasoline to fill the carburetor and manifold up to the point where gasoline is coming out the muffler. The only way for that to happen is if the needle and seat are doing NOTHING. Gasoline is just flowing straight into the carburetor and doesn't stop until it reaches the level in the tank.
 
Sounds like the fuel valve was left on or did not fully stop the fuel, the carb flooded and filled the engine
with gas.

Check the oil, it's probably filled with gas. That will need to be changed before trying to start it again.

When you had the carb apart, did you check the float for gas in one of the pontoons?

Flooding can also be caused by trash in the fuel getting caught in the needle valve, or a bad needle valve or
seat.
 
I opened the gas valve up for two hours no leaking gas. Then I
tried to start it, it would turn over but wouldn't act like it was
firing. I looked at carburetor and gas was leaking out the seep
hole. I pulled the #1 plug and it had gas on it, I turned it over
with the starter and gas blew out of the plug hole. How is that
much gas getting up there when trying to crank it and the needle
valve and float is cutting the flow of gas off when not trying to
crank it.
 
Opening the gas valve up and letting it sit 2 hours is a big part of your problem. You open the gas valve right before you want to start it as in you open it turn the ignition on and try to start it. When you shut it down you turn the gas off then turn off the ignition
 
I opened the gas valve after cleaning and adjusting the float and needle and seat - to make sure the float was working properly and stopping the gas flow. The float cut the gas flow off but as soon as I tried cranking it, it sucked gas into the #1 cylinder and plug.
 
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