Hello,I need help with this motor I just got.Couple of questions.What is the proper spark advance at idle and WOT?The carb air intake cover says 21 deg,thats at WOT?If so what is it at idle?I have a strobe light and figured out how to adjust the advance by moving the arm under the wheel on top. Motor was idling fast so I took the carbs off for cleaning but theye are clean.Forgot witch way the float goes.The side with the "notch" goes up I belive. Cannot find any way to adjust carb.Is it a fixed carb with no adjustment?My old 69 55 hp had a needle on top to adjust mixture at idle speed.This is almost the same carb.Can I swap the carbs from the old one and adjust the idle like in the old one?I would rather fix this the right way.Any advice needed.Thanks Kris