I have the 46 coupe 415-C. I also have the 7.5 gal tanks, instead of 9 like most of you do. My question is, how full to fill the tanks. I have heard that up to the brim, and I will lose fuel to siphoning. I never had this problem in my 172, and I wonder why the coupe tends to lose fuel this way. I am now putting too little fuel in, and just want to know a good ballpark average the rest of you men/women use. Thanks for reading this. Gary
