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WD45 engine trouble?

F

Farmall M Begginer

New User
I have a wd45 (gas) that runs great but recently it started running rough and has no power. It will only run if I keep choking it on and off to keep it going, do I need to adjust the carburetor or is it another problem? if I do need to adjust the carb what are the adjustments?

Thanks,
Coyote
 
If it needs to be choked to keep running, it is a fuel problem. May need a carb kit, maybe not. I like to completely disassemble (careful taking out the brass jets- don"t lose them) and boil it in water for 10 minutes. Removes a lot of inside gunk. Check the float setting- WD45 should have a Marvel Schebler TS464, not Zenith- settings are different- usually start with both adj screws about 1- 1 1/2 turns out. I&T AC-11 service manual has the details on settings.
 
Choking to make it runs if either a carb or fuel flow problem. I would pull the drain plug out of the bottom of the carb and let it drain for at least 5 minutes. Catch the gas to make sure it does not have water and or dirt in it. If you do not have a good flow there work your way back to the tank to find your flow problem. If you have good flow there I would remove the main jet and check and clean it and see if that would help. If doing all those things do not help if is probably time to rebuild the carb but before you open the carb double check your spark and make sure it is a good blue/white spark and that it will jump a 1/4 inch gap. Ya I know sounds funny but weak spark can in fact be your problem
 
If you are using gasoline contaminated with corrosive ethanol, your tank could be corroded and have rust partially plugging the outlet. Make sure you have a good flow into the carburetor. A failing ignition will mimic a lean fuel supply. A tune-up may be needed, just don't use Champion plugs. After you have assurance the fuel system and ignition are up to par, experiment with the load jet to see if turning it improves anything.
 
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