I bought a older evinrude aquasonic fast twin 15hp and don't know what to mix my oil at??? I also need to do some adjusting to the carb and wondered if anyone knew the settings for the adjustment screws. maybe you could give me a quick refresher on how to adjust them. I don't remember which screw is which and which one to adjust at an idle,etc....<br />Any help is GREATLY appreciated. thanx in advance...Brandon