hello everyone i have a jetco shark with a mccoy 19 try to start the engine today cant get to run it will start and die the only fuel i have is sig champion that i use in my cox engines i tried everthing cabt keep it running thev engine has good compression any suggestions

Clean out the carb. It sounds like you have some small bit of gunk inside the needle valve. Use an aair compressor or one of those cans of compressed air to blow it out, and a little lacquer thinner or alcohol to clean it off.

Gabe,
Fuel for that engine should be ~10% nitro, 25%-28% all or mostly castor oil lube. If you need to buy fuel for it, make it all castor lube. If you run 1/2A fuel in it, you probably won't have it for very long.

George

hey everyone thanks for the help i noticed the spray bar is installed wrong the hole is facing straight up looking down in the venturi im also going to use some 10%fuel all castor