The A-4 has an updraft carburetor which sits well below the "intake runners" in the manifold. The "excess" fuel if there is any before cranking would run out the carb and not get into the cylinders. After cranking and no start with the choke engaged is about the only way the plugs can get wet from fuel.
Do you shut the water valve off at the thru hull when done with the engine? If you do is is time for a pressure check of the intake manifold, not difficult with parts from the hardware store. If the manifold is good do a compression check which is easier than pressure checking the "block".
Dave Neptune
