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Deere B Float, Flooding

Steve in IL

Steve in IL

Member
I wanted to pass this by the experts, to ensure that Ive got this right... Friends Model B runs good, as long as the gas petcock (on the fuel bowl) is turned off (runs until fuel runs out). If you turn on the fuel, it will start (after a few seconds) making black smoke and missing, until it dies. Removing the plugs at this point, the cylinders will be wet with raw fuel.

Thinking its a float issue. it has to do with the float allowing too much fuel in. Could be: 1. Float height setting, 2. Non-floating float (hole), or 3. poor needle valve sealing.

Folks , based on your experience, what do you think? Any suggestions are welcome

Thanks.
 
Good chance it has to do with the float and or needle seat/needle.
#1 could be dirt/rust in the seat so the needle cannot stop fuel flow.
#2 bad float and it needs to be replaced.
#3 sticking float due to rust or a float that has been messed with incorrectly.

So what is the back story?? Did this just happen out of the clear blue or has he had the carb opened up
 
Tractor has been sitting in a barn for 13+ years. Fuel system wasnt too bad, but theres likely debris in the system. When this condition started, we took the carb apart.... it wasnt bad, but I didnt perhaps pay enough attention to the float/needle valve.
 
I agree with the other gents, its EITHER the needle valve is failing to rise and close off gas due to rust, corrosion, crud, gum n varnish orrrrrrrrr The float has a leak and is full of gas so its not rising/floating to close off the needle valve orrrrrrrrrrr the float level is set wayyyyyyyyy to high

John T
 
Pull bowl off, turn gas on and move float up to test the needle and seat. Adjust it down according to book.
 
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