Jeff,
the decomp valve with 2 holes covered solves the problem, I just have to work out what will hold on to the block the holes. This is not a problem caused by ignition firing early, it is a compression issue that must be compounded by the belt driven blade carrier. Got me stumped why but this is what it is. I can't believe these machines have been around for years and nobody has come here asking about it. The bloke who dropped it off got a full crank one from me some time ago admitted this one has been a pig of a machine, but it belongs to his father
