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John Deere Tractors Discussion Forum

Carburetor Flooding

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Author  [Modern View]

03-13-2019 15:38:57

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This is a continuation of a problem I’ve been having for 6 months.

Last fall I was backing my 1010 into the shed when it suddenly started shooting foul smelling smoke out the exhaust. I shut it off and gas started pouring out of the carb air intake. I have done the following to no avail since:

Replace float, needle, seat, gaskets

Adjust float and other adjustment screws

Gone through carb multiple times

Replaced top half of carburetor with a spare I had in case it was cracked

I can get it to run poorly with about half to a third choke, but it still floods out the intake if I crank it for a bit.

Spark is not the issue. Anybody got any ideas? I’m at my wits end and out of ideas.


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03-14-2019 09:54:46

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 Re: Carburetor Flooding in reply to Mnethercutt, 03-13-2019 15:38:57  
Could the bowl gasket be rubbing on the float? Possibly causing it to stick in the down position? unc

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03-14-2019 09:13:21

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 Re: Carburetor Flooding in reply to Mnethercutt, 03-13-2019 15:38:57  
To check the float; submerse it in hot water. It will create air bubbles if it's leaking.

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03-13-2019 18:40:49

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 Re: Carburetor Flooding in reply to Mnethercutt, 03-13-2019 15:38:57  
Doesn't sound right that you need choke on part way to run????? Is the crankcase full of gas & vented to the intake making it rich?

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03-13-2019 18:12:29

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 Re: Carburetor Flooding in reply to Mnethercutt, 03-13-2019 15:38:57  
Quoting Removed, click Modern View to see

I’m afraid I already tried that. I submerged the float in a small bucket of gas overnight held underwater by a bolt and the next morning it floated up to the surface no problem, so I don’t think that’s my problem.

Something else I’ll mention—a few times I’ve carefully taken the carburetor off and immediately split it in half to see how much gas is in the float chamber, and it’s always 3/4 of an inch below the top of the bowl. Not sure if that matters but it makes me wonder if it isn’t a float/needle issue...

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Lee B

03-13-2019 17:11:56

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 Re: Carburetor Flooding in reply to Mnethercutt, 03-13-2019 15:38:57  
Pinholes in the floats need to be looked at first since this is at the top of list of unexplained flooding.

Some can hear the fuel inside sloshing around when shaken slowly next to the ear. Others like to plunge them into very hot water and hold them underwater with a wired on stick so as to watch for bubbles of air escaping pinholes or an oil slick as the fuel escapes instead. For the really bad ones just dropping them into water will show very well that they do NOT float high and dry like they ought to but sink with most of the float underwater.

New is short for Never Ever Works. You should still check them.

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