Hi Max/Jeff,
Could be never really gave it enough thought as to the blade boss. The bloke picked up the slasher this morning and he lives right out the otherside of Melb in Fawkner. I have to drop off one of his other ones he dropped here this morning that had stopped on him (new plug was all it needed) so I might pick the PT up again and maybe have a play with the boss idea. He did say today it was always a pig to start but after I played with it earlier this year it was much easier to start. Only thing I really did there was the decomp valve with the restrictor.I do have a PT here with a much heavier blade boss so be interesting to try that one, if that doesn't work I will turn something up. Has to be an answer somewhere