M flooding

grant nelson · Nov 20, 2008

My M floods out. It seemed to start fine this summer but now if it doesn"t start in the first few cranks of the starter it floods. It absolutely pours gas from the rubber junction where the carb meets the air intake. I have a tank heater on it, which I used, and it has been converted to 12 volt.

Any suggestions?
Farmall Flooding

Janicholson · Nov 20, 2008

If you are choking it, try having the choke on for just the first cylinder crankover, then opening the choke all the way.
If you leave your fuel valve on when it is not being used, shut it off (even for a 15 minute break) this keeps fuel from entering the carb through a slightly worn needle and seat, and is to be considered Standard Operating Procedure.
If the engine runs normally when it does start, I suspect the worn needle and seat.
The rubber tube should not leak anything. A leak will pull in dirt, Not good.
An air cleaner with heavy oil (should be engine oil) or one with water freezing in it, will also cause the flooding. JimN

CNKS · Nov 20, 2008

Jim is correct, but that is pretty severe flooding. I suggest replacing the needle and seat, while you are at it you might as well do a complete carb rebuild ( disassemble, soak in carb cleaner and install kit). Most of my carbs leak some, but the hole in the bottom of the carb takes care of the drainage. I do shut off the valve when not in use. IH carbs typically flood when started with too much choke, they run a few revs, die, and won't start afterward.

grant nelson · Nov 20, 2008

Thanks for your quick replies, I really appreciate it.

I do always shut off the valve on the bottom of the tank so that's okay. I put new oil in the air intake this summer also. Looks like I'll begin with the hints on starting and a carb overhaul.

Thanks, again
Grant

Anonymous-0 · Nov 21, 2008

Grant....you may try removing your carb. float and give it a "shake". If there is some gas inside it, it won't operate your needle valve correctly. Had to change mine a few weeks ago, must have been a pin hole in it. Same symptom as you have. Good luck.

grant nelson · Dec 2, 2008

Just a little followup. I took the carb into a mechanic and he did a rebuild. The float did not have any fuel in it. I replaced the carb but it still was flooding. I spoke with my brother and he suggested checking the air intake for dirt as that could restrict air and cause flooding. I removed the pre-cleaner and it was horribly dirty. The intake pipe also had about a 1/4 inch of gook on the inside which I cleaned. I put everything back together and it started great.

Good news about the carb rebuild is that the tractor ran so much better now, with more power and much smoother.

While I was at it, I bought a new seat. My dad found the old flip-over mounting and so I used that also. Then I put together a pre-heater for the intake by using some stove pipe around the muffler. Also wrapped foil insulation around the outside of the tractor to hold in a little more heat this winter.

It really runs nice now and starts on the first crank. I should also mention that my dad said he"d never touched the carb and he bought the tractor in 1961.

Thanks for all the help!!
Grant Nelson

grant nelson · Dec 2, 2008

M flooding

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