Thanks Bigted and Trev, the spring had been all bent and they had it sort of in the hole half way down the governor arm. Great motor, must have been a bit of a flutter by Rover to enter the 2 stroke market, I guess the idea didn't last too long, although there is the odd one on Gumtree and ebay. My opinion on the 2 strokes is that they are a grass cutter/lawn mower, the 4 strokes are for lawn mowers