Got lucky, found that the carb was not seated properly, loosened the binding clamp and compressed the carb into the engine and tightened, also sealed the back plate but it showed no signs of leaking. The carb is supposed to have two o-ring/ gaskets under carb, mine has only one, will order correct set. Changed from an OS A3 to a Mc Coy MC-59 [long threads] and she purrs like a kitten until you open it up and the she roars.

Gary