Another leaky M carb problem

Grandad · Feb 12, 2010

I have a '49 M (50983DB carb)that runs perfectly but floods easily - don't they all ? - and something causes gas to literally pour from the carb when you choke it more than the slightest amount. Showing my ignorance here... is there some obvious reason why closing the choke would drown the carb like that? I was thinking it's a float related problem, but wouldn't that cause running issues as well as starting issues? I haven't pulled the carb apart and reluctant to do a full rebuild unless that's my only option... because it otherwise runs so well. If any of the guru's here have suggestions, I'll sure appreciate them. Many thanks,

Hank

Bernie Steffen · Feb 12, 2010

Grandad. Have you tried starting the tractor without choking it? My M will start on all but the coldest days without choking. After it starts you have to pull the choke a little but not much. Buddys 400 does the same. You might try it. Bernie Steffen

Dave H (MI) · Feb 12, 2010

I'll second Bernie on the choke. Don't think I have ever used it on the MTA and it starts always. Did your M do this in warm weather or are you not somewhere cold? It makes a difference if it does it 365 days a year or just in winter. If your float or needle were suspect it wouldn't take choke to make it overflow...it would be doing it to some extent just sitting. It sounds a little like operator issues...from someone who has BTDT.

old · Feb 12, 2010

Give this a try but be sure it is out of gear if you do this and don't just check it once but check it twice at least. Turn the gas on. Count to say 60. Turn the gas off and then try to start it. When it fires up turn the gas back on and go. And yes it could be a float problem but more then likely it is op error and you are choking it to much

Grandad · Feb 12, 2010

I hope there's actually nothing wrong with this old girl. I worked my father in-laws M plenty 45 years ago and recently got hold of this one to bring back some memories
No doubt I have forgotten a thing or two over the years, but I sure don't remember that cracking the choke even the slightest amount caused a flood pouring on the ground back way back when. In warmer weather the choke isn't needed, of course.

Grandad · Feb 12, 2010

Don't know how my other reply got out of sequence to all your posts, but thanks for everyone's comments... I'll leave the choke pretty much alone from now on and gladly avoid messing around with the carb too. You guys are a great resource. Thanks for helping.

WY JERRY · Feb 12, 2010

Going against the grain here but... My M had gas pouring out of the carb after shutting it off. My problem was the float was being allowed to drop too much and the needle valve fell completely out. Therefore no way to stop the inflow of gas when the bowl was full.

It is a pretty easy fix - just bend the tab on the float where it hinges to not open so much.

Another leaky M carb problem

Grandad

New User

Bernie Steffen

Member

Dave H (MI)

Well-known Member

old

Well-known Member

Grandad

New User

Grandad

New User

WY JERRY

Member

Similar threads