Misses and pops in exhaust pipes from anything over 1/4 throttle to 3/4 throttle, when wide open it runs great at top speed.
Sounds like your carb needs the fuel/air mix adjusted..uses all the gas at high speed but has excess at low speeds...find your adjusting screw and at med throttle slowly screw it clockwise until the engine starts to sputter then back it out until it starts to sputter again then continue to do this until you reach ideal mix where it runs the best it can..then go slowly through the throttle up and down..when set..unjust your idle speed screw to your ideal idle speed..if this dies not fix ..carb will bed cleaned or rebuilt. Good luck.. Note always push or pull your throttle handle slowly to position avoids gas load up causing sputter and backfire.
SOURCE: Engine appears to run normaly until PTO is
Check you float in the carb I had one a few years back and it was partualy plugged cleaned it out and everthing worked fine. Also is the PTO binding up or bearings going bad putting an excessive load on the motor.
SOURCE: 18 Hp V-Twin quits after warm up - will restart
i have the same issue and trying to figure it out so I appreciate being part of this conversation,
SOURCE: My 18 hp vanguard is
if the diaphragm in the fuel pump gets a small hole in it , it will still run, but **** fuel into the crankcase, the fuel pump is serviceable, and easy to rebuild, a new diaphragm kit is fairly cheap at any local saw shop, just remember to take the model number off of the engine so they can look it up, and sometimes its a good idea to take the pump in with you to match it..
SOURCE: I have a 23 hp
It is starving for fuel. Replace the fuel filter first thing. Clean or replace the air filter. Also purchase a can of Seafoam or Techron fuel treatment. Follow the directions on the can and put some in a full tank of fuel. After running this full tank if you still have the problem then you may need the carburetor adjusted or cleaned out. I would advise you to seek professional help in accomplishing this.
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