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Carb leaks gas when starting

J

Jeff338

New User
I am having a problem with my M. Whenever I try to start it, if the tractor does not fire and start right of way, gas will begin to pour out the drip hole and I believe the tractor floods. If it starts right of way I don"t have any problems. If not I can"t get it started. I thought something was wrong with the carb so I tried a carb from my Super M and I get the same symptoms. Does any one have any ideas? Thanks.
 
(quoted from post at 07:57:52 10/25/11) I am having a problem with my M. Whenever I try to start it, if the tractor does not fire and start right of way, gas will begin to pour out the drip hole and I believe the tractor floods. If it starts right of way I don"t have any problems. If not I can"t get it started. I thought something was wrong with the carb so I tried a carb from my Super M and I get the same symptoms. Does any one have any ideas? Thanks.
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Those old Farmalls just plain do not like very much choke. Always try starting with NO choke, and then if it doesn't start, pull the choke out just a little, more if needed, but be ready to shove the choke back in, and then give it just enough choke to keep it running until it warms up just a bit.
 
Have a similar problem on a couple deeres I have...Not a fix all but works for me is to turn the gas on for a couple of seconds and then turn off...then once started turn gas on for good...not a correct fix but has worked for years...but I also shut all my tractors down by turning off the gas and letting fuel run out...
 
have you checked the air cleaner lately ? make sure its not plugged somewhere or just plain full of dirt.
 
I searched the forum and have seen others with similar problem. I am leaning toward problems with the manifold or gaskets. I have also tried spraying ether into the inlet of the carb while cranking and it still would not fire, so maybe gas isn't getting there?
Thanks for the suggestions. Keep them coming. I will monitor the forum.
 
I have a similar problem with my H. When I shut it down I immediately turn the gas off at the sediment bowl. When I start it I immediately turn the gas on once it is running. This involves trotting quickly from the front of the tractor around to the side, but it is not that far. Sometimes I forget to turn the gas on and then I do not make it very far.
Zach
 
The old Farmalls do that. They need very little choke and if they don't start right up will leak some gas. Concerning posible manifold issues, you tractor would run poorly if you had a leak on the manifold so if your tractor runs OK when it starts then thats not the issue.
 
Your carb is flooding, probably because of a float/valve issue.

Pull the bowl and check the floats, and put a new valve in - or at least clean the existing one.

Take the floats out and shake them - carefully listen for anything inside. They can and do leak sometimes. If they fill with gas, even a little, you'll flood.

If you don't want to mess with the carb, instead of turning your tractor off with the kill switch, turn your gas off and let the carb run dry to kill the engine.

Then when you want to start it, open the gas and start the engine right away, before it floods.

If it's not starting, and the carb is dripping, turn the gas off and continue trying it until the carb finally empties out. Then it'll start, and you can immediately open the gas.
 
There was a point made in an earlier post that I agree with 100%. When ready to shut the tractor down, turn the fuel off and run the bowl dry. This is especially important if it is going to sit for any period of time before the next run.

lots of reasons to do so, and it is just good habit.
 
I checked the manifold and it has a hole in it. This makes sense to me. The suction at the air intake of the carb is enough to pull the gas out of the carb but not enough to get it to the engine. Therefore it drains out the weep hole. I am going do a temporary fix with high temp RTV and try it this evening. I have also ordered a new manifold as mine is very thin. Will try to remember to post the results.
 
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