9N Flooding

[InstantLegend]

Hi,

My 9N has been flooding as soon as I try to start it. Within 2-3 seconds gas starts pouring out the bottom of the carb. It will adventually start after a few minutes and then runs fine. Here is what I have tried so far with no success.

Cleaned the carb with carb cleaner and air
Still Flooding

Cleaned the carb again with cleaner and air and checked float adjustment. Adjustment was fine. I floated the float in some gas and it seemed good. Didn"t hear any gas in it when shaking it.
Still Flooding

Cleaned sediment bowl. Replaced battery. Replaced plugs. Took carb apart again. Cleaned and replaced needle valve and seat. Installed top part of carb only. Played with float and found it to completely shut off gas flow as it should. Checked 1/4" adjustment again. Put carb back together and back on.
Seems to flood faster than ever now.

Please Help!

I am thinking about buying a new carb. I have to get this thing starting good before snow comes.

 

[InstantLegend]

Meant to say I replaced the needle valve and seat with new ones.

 

[trac]

Im not a carburetor genius but are you sure the choke is hooked up right?

 

[InstantLegend]

Yes, the choke is working properly. It won't start without choking it.

 

[Tom N MS]

Float could be scrubbing inside causing it to not work the needle. Is the gasket under the needle seat in place and is the seat tightened down really tight? With carb apart take the float needle between your fingers and with slight pressure twist it around and around in the seat. This helps form a sealing ring on the needle seat.These are about the only things that will cause flooding like you describe. Please let us know what you determine.

 

[Paul N Texas]

I was having a similar problem with my 8N. I also had a problem with it only running a couple of minutes, and quitting. Both were carb problems. I have tried everything (I thought) to stop the flooding. I finally took a center punch, and put a little valve grinding compound on it, and lapped the seat. I just rolled it back and forth like doing a valve a few times, used carb cleaner to clean it up, and when re-assembled, it did not flood. For the short time running, I had been doing the quick cleanup of the carb, and blowing air through it. I finally out it in my gallon can of carb cleaner, left it for a couple of hours, and washed it off with water. I had two jets that would not come out, so I took my little thumb drill bits (for cleaning a oxy-acetylene torch), and ran them through the jet to make sure they were clean. One had some crud deep inside. I finally got it cleaned out, and air passed. It now sits and runs beautifully, and has power again. I usually drain the gas from the bowl after I run it, but apparently forgot, and something caused the blockage. The light lapping fixed the flooding on my carb, not sure about yours though...

 

[Den N Ms]

InstantLegend.Be sure that you put a gasket under the brass seat where it screws into the carb top.Also the seat must be tightened very tight to prevent gas leaking around threads.Also twist the needle in the seat using a small length-piece of tubbing or vacuum hose to seat the needle valve to the seat.Also shake your float again for gas inside,and be sure its not dragging on the float bowl.

 

[trac]

Needing lots of choke or fuel is making me think you have weak spark i'm sure someone with more know how with your problem will chime in

 

[InstantLegend]

Yes, I replaced the seat and the gasket with new ones. With the top of the carb installed with the bowl off the needle valve doesn't leak. No dripping or anything. I have shaken the float multiple times and there is no gas in it.

 

[InstantLegend]

If the needle valuve was leaking, would it leak while sitting (not running)? I doesn't leak while sitting.

 

[Roger in Iowa]

If you have ever applied air pressure to the carb with it assembled, you may have partially collapsed one or both of the floats. Are either of them caved in, even partially. May float in gas but not have enough float force to hold needle tightly into the seat.

My $0.02

 

[souNdguy]

did ja check the flaot needle and seat / gasket?

soundguy

 

[Den N Ms]

If the needle valve was leaking, would it leak while sitting (not running)? I doesn't leak while sitting.

Yes it would leak setting still or wile running.If its not leaking with the engine off,maybe what you are calling flooding over is just from excessive choking and fuel dripping from the sintered brass plug in the bottom of the bowl which is normal after excessive choke has been used.

 

[lha]

When I rebuilt my carb,I didn't have float problems and didn't want any.From a tip I got from G.B. or Bruce about getting a sharp pencil,and "lapping" the seat.I have had no problems.One way I start my N is to crank,key off a couple of revs,popping the choke while doing so.Then I turn the key on and it always starts on 1/2 rev,then if you need to you can play with the choke for a minute or so until it stays running.My $.02---lha

 

[kev8n]

I was looking at an allegedly "rebuilt" carb recently on a 75 Dodge truck because it was flooding and running rich. I opened it and the previous owner had actually put the needle in *backwards* with the Viton tip against the float tang.

kevin

 

[trac]

As Dell would say IT'S NOT YOUR CARB.WEAK SPARKIES i know if i leave the choke on to long they will flood so it comes down to EASY STARTING with mine if they sit awhile i have to choke for 1 second and fire right up the motors are new so the compression is great. Your spark plugs are new so you can rule that out. Something electrical?

 

[36 Coupe]

A fellow I was talking with had trouble with flooding.I shook the float and it had some gas in it.He tried it but couldnt hear it.My test is to put the float in a tuna can with water in it.Heat the water and push the float under.A stream of bubbles will come out of the leak.Plastic floats will absorb gas.You need a scale or new float to catch them.I have found many leaking floats.Sounds like you are using too much choke when starting.

 

[InstantLegend]

I fixed the problem by making the float gap 1/2" instead of 1/4". No more flooding.