I have a Wisconsin v4 on a generator. Generator is several years old. It is in a metal cabinet large enough that you can look over the engine. The problem is, it is getting water in the oil. Only two penetrations to the cabinet are the intake and exhaust. Exhaust goes straight up then turns 90 deg to a 3 ft long muffler with a vertical output with a rain cap on it. Intake goes up at an angle to the wet air cleaner outside. Engine is never hydro locked with water on top of a piston. If water is getting on top of the engine, can it get into the crankcase somehow? My last resort is to build a roof over the generator. Thanks for any opinions.