From your first set of pictures the carburetor looks like a large one-piece flo-jet. If so it will have the mixture adjustment screw sticking down vertically from the bottom-center of the float bowl (vertically down below the idle speed adjustment). Please photograph the float bowl from lower down in front so we can see this.
Your engine was made on the third of June, 1988. According to the model number it has a 12 volt gear drive electric starter with alternator.
From your reports of blue smoke it sounds as if your engine is well on the way toward needing new rings. Meanwhile I hope you are keeping its oil clean. That has a major effect on the wear rate, and as you said, parts for your engine are expensive in Australia. It would be unfortunate if your Synchrobalance wears out.
Last edited by grumpy; 04/01/11 03:05 AM.
