H squirting gas

fordhead1983 · Jun 12, 2012

I've got a 1940 H that I've gone through a couple times and did some touch up work with. I've had the carb rebuilt 2 times. Once when I first got it 13 years about, and about a year ago. My problem is that when I crank it over several times, choke in and out both, after a few revolutions and I stop, the carb acts like it's sucking in air, and then leaks gas out. Only on starting. When running, it's fine. Any ideas?

old · Jun 12, 2012

Float maybe sticking or you may have some dirt/rust in the needle seat causing the same problem. Try removing the drain plug from the bottom of the carb and let flue flow for a few minutes. Catch it so as to look for dirt/rust/water and also so you can reuse that liquid gold

JRSutton · Jun 12, 2012

Just flooding.

Probably due to floats not set exactly right - floats have a leak - or the little needle valve is clogged/defective.

if everything else is fine except for the occasional dripping - I'd personally leave it alone until winter comes around - then fix it.

not that it's particulaly hard to work on - just seems that bigger problems tend to happen once you start mucking around with them, or you loose a part - or whatever.

Bob M · Jun 12, 2012

Most likely you are using too much choke! What you see "leaking" from the carb is excess gas from overchoking draining from the drain port in the carb air inlet.

Suggested cold start procedure: Begin with the throttle at about 1/4 and the choke open. Now during cranking quickly "flip" the choke closed and back full open again. If the tractor is in good tune it should start right up.

rustyfarmall · Jun 12, 2012

(quoted from post at 12:51:08 06/12/12) Most likely you are using too much choke! What you see "leaking" from the carb is excess gas from overchoking draining from the drain port in the carb air inlet.

Suggested cold start procedure: Begin with the throttle at about 1/4 and the choke open. Now during cranking quickly "flip" the choke closed and back full open again. If the tractor is in good tune it should start right up.

Exactly, and when the engine starts, give it just enough choke to keep it running, and that is not very much.

Zachary Hoyt · Jun 12, 2012

I choke my H partially when air temps are below 50 or so and the
engine is cold. The rest of the time I push the throttle ahead all the
way and hold the starter button for 1 or 2 seconds while
simultaneously pulling the throttle about 1/3 open. It will usually
fire immediately and I push the throttle ahead again to a low idle
for a few seconds while it builds oil pressure. I used to have to use
the choke more when I was hand cranking the engine, but then it
was easy to flood. If you get too much gas in the carb just shut off
the gas at the tank till the engine starts.
Zach

CNKS · Jun 12, 2012

As the others say, too much choke. Every IH carb ever built will do that. Most tractors will start without the choke, regardless of the weather, the trick is to get the choke partially closed after it starts until the engine smooths out.

Captndan · Jun 13, 2012

That's an H for ya. Any more than a couple turns and it will
flood.

mkirsch · Jun 13, 2012

Every tractor is a little bit different. Try to learn what the tractor likes as far as starting conditions, like throttle setting and when/how much to choke.

D Slater · Jun 13, 2012

What you see is gas sucked up into the intake system and when the engine doesn't start it falls back down. You say it doesn't matter if choke is left open or closed. May want to check the ignition system, timming and compression. When the engines are in good tune they should fire before it has time to flood.

H squirting gas

fordhead1983

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old

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JRSutton

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Bob M

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rustyfarmall

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Zachary Hoyt

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CNKS

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Captndan

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mkirsch

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D Slater

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