[gtractor1]

I have a 24 hp v twin Intek that is driving me CRAZY. It is on a Huskee tractor that was given to me. Model 407577 0292 E1. It has the single barrel Nikki carb with no fuel adjustment screws. The tractor looks like it was taken care of but the engine runs like crap. When I first started it it wanted to lope at idle so I checked the governor adjustment which was ok. Since then I have checked everything there is to check--- valve adjustment, compression and leakdown tests, ignition spark, new plugs, checked the flywheel key, new fuel pump, fuel filter, and checked for intake leaks with my propane wand. At some point it stopped the loping but still is not running smooth. I removed the carb, got a new seal and cleaned the carb out. It seems to be running lean because when I pull the choke partly out it seems to smooth out. I am at my witts end. I am about ready to find an old style carb off a Kohler or Briggs and put on it. Im sure that would be a challenge.
I would appreciate any input on this problem. Thank you in advance,

 

[AVB]

It may be a little for you to do but it sounds the current main jet is a size too small. I wish I had a PN to jet reference but I had received little to no input from fellow techs or even from Briggs on the jet sizes. It like it is a big super secret that would destroy the world.

Your current jet will be marked with it size and you need to drill it out to next size or find the next size. For reference if the jet is marked 115 it would be 1.15mm and next easily to drill to size would 1.19mm or a no 56 bit.

So if you can tell me your jet size I can give the next easily obtainable drill size or may be even factory jet size.

 

[gtractor1]

I have considered drilling out the jet. I have a set of drills to drill out torch tips which are great for that.I'll just gauge it with a drill and use the next one bigger and see what happens. Worst case scenario, a new jet is only $11.