Farmall B - carb

Tractor started better before I rebuilt the carb. Jumped right to life and sounded strong originally. Now it does start but sometimes takes two tries. It can tend to sound a little chokey when first started but this clears up in a minute or so. Sometimes it was stalling after running around 30 seconds or so BUT the sediment bowl was leaking then and it might have had air in the fuel line. It always restarted.

As far as operation? Cannot complain as to how it runs. We took it on a four mile drive up and down hills without incident. I would be curious to see it pull a fully loaded hay wagon just to see how it ramps up under load but that is still a week or two out.

As far as idle? The low idle is still kind of rough. I have not tried to adjust it in a week but back then the idle jet needle did not have any effect on idle speed...so I guess I did not get that as clean as I should have? Doesn't seem possible.

Reminder, this is a Zenith carb with no main jet adjustment. The carb is still set at the manufacturer's recommended starting adjustments of one full turn out on the idle screw and I believe it was 1.5 turns out on the throttle arm screw. This latter adjustment leaves the throttle plate open a tiny crecent when throttled down.

There are no more leaks anywhere in the fuel line BUT I noticed a drip from the bottom of the carb yesterday. The tractor is nose down on a hill at the moment and it's possible there's an issue with this angle and the float...I can check this easy enough.

There it is in a nutshell. I am out custom fitting some parts for the buddy seat today. Managed to clean and tap out all the holes yesterday and seat some new hardware without breaking off the tool in the casting or my usual encore performance of breaking off the bolt in the casting followed by my regular curtain call of breaking off the "easy out" in the casting. There may be hope for me!

On start. Tractor wants NO choke. Turn on the switch, crank the engine with little or no effect (used to start almost instantly). After many cranks some white smoke appears in the exhaust, it pops a couple of time, then it starts and runs as if it were choked (which it is not). It gradually gains power with lots of white smoke and then the smoke disappears and the engine smooths out.

On idle. After warming for a bit at about half throttle, I tried to idle it down and it does so pretty nicely. With the throttle all the way back there is a low idle with some black smoke. The idle gradually starts getting rough and the smoke gradually increases. Not belching out like a locomotive but it is there. The white smoke is worse on start.

Any of that make any sense? I don't know how to read smoke yet except for the bluish white burning oil smoke....that ain't it.

I would lower the float level. Having to choke the engine thas has not just been turned off is not unusual, even in the summer time. My 2444, same series engine as yours, starts much better with a little choke even if I just shut it off.