I'm stumped........

A few days ago, I had to quit using one of my H Farmalls 'cause the carburetor was running over. The float had obviously stuck, and gas was pouring out.

I cleaned up a spare carb and installed it. It would run great at any throttle setting from idle to full throttle, as long as the tractor was standing still. Put it in gear and let the clutch out and it would stall from fuel starvation. Step on the clutch and hit the choke and it would take right off again. Double checked the hookup from the governor, and tried adjusting the power valve. Loosened the gas cap. Nothing changed. Pulled it off and double checked the float setting. It was OK.

I then boiled the original carb, checked the float valve, and re-installed it. Same thing, gas pouring out.

Took the other carb apart again. Checked the float level and idle and power valve settings. Book says initial setting of 2 turns open on the idle screw and 3-3 1/2 turns on power screw. Put it back together and put it back on the tractor. No change. The fact that the engine rpm follows the throttle from idle to full throttle tells me the governor is hooked up properly.

One thing I haven't checked is the screen at the sediment bowl, but from the way gas was pouring out with the original carb, I doubt that there's any obstruction in the sediment bowl screen.

That's where it sits right now. Runs great through the full throttle range, but put it in gear and let the clutch out and it stalls. Step on the clutch and give it some choke and it takes right off again till you let the clutch out.

I've done enough of these that I don't think I've overlooked anything, but I must have.

Any ideas? Thanks in advance.

Sounds to me like the main jet is plugged on your spare carb.

Do you maybe have a pinhole leak in the float of your original carburetor? Hold the float next to your ear and shake it; if you hear gas sloshing around you need a new float.

Hello Goose,

I am not familiar with your carb, but you should really check the screen, as it sounds that you are not having enough fuel flow. If the carburetor is still flooding check the float. Make sure it does not have gas inside it. Shake it against your ear, you may feel the gas inside too. Put it in container with gas and see if it float,


Guido.

you are not running out of gas sounds like idle passage or leak of a gasket

Let the gas pour out into a clean can for 2 minutes. If the flow stays steady and solid it is in your richness (load screw out another turn) if it slows to a much smaller trickle, it is in the line filter at the carb, or the sediment bowl, or the inlet from the tank to the bowl. Jim

Take the brakes off...... Just Kidding

Fuel starvation and weak spark can closely imitate each other.

Check the points gap, check the distributor shaft for side play. A worn distributor shaft bushing can do some strange things.

Check the spark quality at each plug when it is acting up. Try moving the wire harness to the coil and under the dash near the switch, try wiggling the switch, see if it will misfire.

If that all checks out, check the fuel available to the carb bowl. Remove the drain plug from the carb bowl, see what kind of flow it has. Should have a full flow then slow to a trickle but not to a drip or stop.

If that checks good, try backing the main jet adjustment out another 1/4 turn. The proper adjustment, it should take full sudden throttle from idle without hesitation. A puff of black smoke is the goal.

See if u some how got bad gas or water in the gas

Change out the condenser.