Got the oil drained and refilled (6 qts. ??). Well, here are some more puzzling things about this engine. See pictures below. The carb fits fine and the tube on its air intake lines up with the hole thru the block. This carb is supposedly the "original oem" for the engine. BUT, the bowl on the carb interferes with the starter. If we rotate the lower part of the carb 180* the interference is eliminated. BUT, the carb air intake is now pointing away from the block. We seem to need a different carb or a shorter starter. Ideas?? Bob