I removed and cleaned the entire air cleaner assembly on my 1990 316 with an Onan. I used spray carb cleaner and adjusted the carb screw. I even checked the adjustment with the rotary engaged. However, when I reassembled the air cleaner, the engine now surges (again) after the surging appeared to have been corrected. My question is this: Do I need to compensate for the air cleaner being off by setting the mixture a little to the rich side? OR, is there a way to reach the carb adjustment screw with the air cleaner in place. As you probably know, it is tough to see, never mind reach with a screwdriver with the air cleaner installed. In addition, the heat from the muffler in the front of the engine only adds to the challenge. Any suggestions? Thanks!