I had this issue. Also, at the same time, saw seems to show high compression when pull starting. Obviously. like other commentators here, I suspected clutch spring issue. This was not the case. There is a first version of this saw and a Mark 2. I have first version. I was very surprised to see that in my version the clutch rim drives the oil pump worm drive. Therefore if this worm drive is stuck to the crankshaft (and I'm not sure what the designers' intentions were), ANY rotation of the crankshaft will drive the clutch rim and therefore the chain. This means that when to try to pull start the saw you are actually driving the chain, I think! Seems a big design mistake and I notice that at least one other comment here mentions the worm drive sticking to the crankshaft, something that may be difficult to prevent. In Mark2 version a small washer (530 09 56 11) is introduced behind the clutch rim to stop any interaction with the worm drive and a new worm drive is introduced (therefore also amended oil pump parts?). It takes a little bit of searching online to find the parts diagrams for both of these 135 version.
