Bill, Mine is definatly a walbbro of 14 MM bore. I found a site that has part at discount , a new OEM muffler is $6.70 and a gasket set is $3.60. There may be cheaper places but I have a starting point, price wise. Whacker has the big bore carb for $30.00 if I need to replace the one I have. Right now I am trimming the carb/crankcase plate and will start grinding the forward flange to contour. I will have to build an engine test stand as I dont have a plane built yet to put the engine on. Does anyone have plans for one or can I just wing it. I've got lots of wood and screws laying around so it should not be a problem to knock one together.

Thanks for the Zama info. More later.