Sorry LRT, no pics as it is at my mates place out of Ballarat which is always a problem for anything I have to make for it. The spring tension holding it full throttle is fairly strong, but I was running out of time and it was getting dark and I just wanted to get it fired up before I came back home. I have to make up a petrol tank and lengthen the exhaust manifold pipe so the muffler clears the bonnet. When the motor is running I have to hold the lever where the cable connects to back hard under this spring tension otherwise it will go full throttle. I'm thinking the spring may be somehow connected to the wrong side. I will go back up once I have made up the bits I need and see what I can work out.
It is one of these motors
http://www.ebay.com.au/itm/13hp-rid...tart-vertical-shaft-petrol-/281070932761