Hi Grumpy, sorry I didn't get back to you yesterday, got quiet busy. Have ran through suggestions you gave me one at a time, wasn't a fuel problem, spark plug is correct one and is good order (not burnt out, correct gap , not dirty etc. ), muffler wasn't blocked and spark arrestor wasn't blocked either. Went back to double check timing and noticed both valves open a fraction all the time, reset them both and now running like a new one. Thanks again for your help ( put it all in my memory bank ) , much appreciated. Paul.
