Chainsaw Repair

first thing , hold throttle wide open with switch turned off will kill most run ons , next ALWAYS have your squirt bottle you prime the saw with to start it with you , just squirt your mixed gas into carb on saw that's running on , it will quit . Are you guys cutting the ends on your spark plug , if you that's your trouble , the end of your plug will glow when running nitro/alcohol and will not shut down until its flooded , you can turn your switch off but it will not matter . Next if your running a pipe with wide skirt piston and ports to match you donot need or want big compression