Super C carburetor issues

I think my carburetor on my Super C needs to be rebuilt or at least adjusted. This is my first tractor, some of you might remember my questions from a couple months ago before I bought my tractor. I am 18 years old, and do not have much experience with carburetors.

Anyways, here is the problem. I always try to remember to shut off the fuel line to the carb when I turn off the tractor, but one I forgot to shut it off and I noticed gas leaking out of the carb after a few minutes of sitting. When I tried to start the tractor, it would not start. I shut off the fuel line and gave it a few minutes and tried to empty the fuel line of all gas to the carb and let the engine get un flooded. It started up, but it was running really rough like it was choked, but it was not choked at all.

One other time I forgot to use the fuel shut off and it ran really rough for a couple minutes.

As a separate issue probably related to the carb problem, I noticed the throttle does not work the way it should. The engine seems to run at the same RPM when it is at 0 throttle as when it is at one third throttle. I am not sure if it idling too high or if the throttle just does not start increasing RPM until one third forward.

I might try rebuilding the carb with a rebuild kit. The carb is a Zenith.

Thanks for the help.

John

Your leaking problem is actually pretty simple. The needle and seat are not shutting off/sealing. That could be caused by Some crap stuck in the seat holding it open,or a groove worn in the needle/seat.Or it culd be the float. The float could be catcking on theside of the bowl;it could be simply adjusted too high; or it could have a hole,causeing it to fill with gas and sink.the idle issue could be the idle stop screw misadjusted(screwed in too far); too much wear/slop in the linkage;or it the governor itself.Either wear,or an adjustment issue. You will need a service manual for that one.Everything else can be accomplished just by some simple observations.

The throttle action is normal, as long as it comes up to full speed,don't worry about it. There is a brass balloon inside the carb called the float. it is retained by a pin that slides out the side. Under the float is the needle and
seat. As the carb fills to the proper level the needle pushes into the seat to
shut off the flow. A small piece of dirt will prevent proper closing and cause
over filling of the carb bowl. Corrosion of the seat or degrading of the rubber
part of the needle is possible. You will probably need a new gasket and needle
and seat, not hard to do. Give the float a shake and make sure no fuel is
inside. Set the top of the float parallel to the top of the carb by bending the
little tab on the float. Good luck

Needle and seat on the fuel leaking/flooding. Very normal for Farmalls of the letter series and XXX number series to have dead spots in the lever action from all the way toward idle, to the beginning of more RPM. if the governor control lever on the back side of the governor is moved to its maximum speed limit (all the way) when the hand lever is moved to full speed, all is well. Jim

Also!! always shut off the fuel at the tank even if it does not leak. Cars have fuel systems higher than the tank, these tractors use gravity,
and we can never be certain that there won't be a needle/seat issue that can actually fill the engine with gasoline. It is very possible! Jim

Like others said, the carb is flooding.

It only takes a tiny piece of rust or trash to hold the needle off the seat. Might take a fuel sample from the line at the carb. Drain some gas in a clean glass and see what you catch. If it's dirty, the tank is contaminated and will need to be removed and rinsed out. Be sure the sediment bowl screen is in place. Some add an inline filter, I personally don't like them, they can be too restrictive for gravity flow systems. Once everything is clean and back to factory design it should be fine.If you can get E85 gas, it makes a good cleaner to rinse out the tank.

Those carbs are simple, designed to be field serviceable. Just be sure to work over a large uncluttered area in case something is dropped. I would start with just trying to ease it apart and look everything over. It may go back with just a good cleaning and adjusting. If you need a float, or a needle and seat, just buy what you need. There are kits that are called "comprehensive kits". They have everything available for a complete rebuild. Unless you have excess wear in the throttle shaft, I would not go that route. Trying to replace all the parts is difficult and often unnecessary. Just do what is needed, keep it simple.

You can find carb specs and adjustment procedures online with a little research. Or invest in a shop manual. You will eventually need it, especially if you get into the governor adjustment.

Thank you everyone for your advice. I am going to work through the steps you guys mentioned and see what I can fix and what I need to buy.

John

(quoted from post at 21:11:56 05/28/19) Thank you everyone for your advice. I am going to work through the steps you guys mentioned and see what I can fix and what I need to buy.

John

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The main thing you'll need will be a carb overhaul kit. They don't always come with a new float, and you'll want one, so ask first if the float is included.