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i was able to drill ball out on throttle shaft, turned screw out two turns and unscrewed the aneroid valve three turns. Throttle response is much better, and finally a grey haze of smoke.

how hard is it to drill out screw in throttle shaft, and are all pt pumps the same in having the ball in shaft and adjustment screw.

im not really familiar with thenhc-250,I changed fuek and air filter, seems to idle fie and smooth. when revving up from idle tach and rpm is slow reacting,today driving upa slight hill and rpm would not go above 1500rpm in a 5 ton.if you have pic I would greatly appreciate and help to adjust or...