Thanks guys, I have not repaired the saw yet, I removed the exhaust as a last resort but have not had not had time to work on the saw, I have the parts list but no workshop manual or cash to replace diaphrams or tools to measure pop off pressure. I also have another old chainsaw, brushcutters, and a two stroke mulcher (briggs and strat). I met one guy who used degreaser spray to start 2 stroke engines as it has a hoydrocarbon propellant i.e. propane, butane, etc; as does hairspray etc. The problem for me is that this saw has never been dismantled before and I am scared of the tiny springs, fuel screen etc in the carby. Are there and chainsaw workshop mannual repair files on the chainsaw link. I also have a problem with the choke, thottle linkage on this saw for cold starts, perhaps I just need to bend and try and adjust angles, or bronze and file etc. When if I get some cash does anyone have ideas about new saws around the farmboss, stihl capacity, quality saws. Thanks again guys for so much help on topics. chainsaw rockon Gomower