About a year ago I began trying to fix an old 028 woodboss that had been sitting for about 10 years. I rebuilt the carb and it ran fine for awhile but then it wouldn't shut off (I would switch it off and it just wouldn't quit) so I replaced the ground wire and now it won't start at all unless I put a little fuel in with the spark plug and then it'll only run for 10 seconds or so and if I try to give it throttle it will die. I have taken off the fuel and impulse lines and they are not plugged nor leaking. I have cleaned the carburetor, I made sure the spark plug had a spark, and it seems like it has good compression because it will start for a few seconds with a little gas put in the spark plug hole. Any advice would be greatly appreciated, thank you.