I have a 1981 Mariner (Yamaha built) 25hp motor. It's a short shaft tiller with E-start. It's a 695 model 25C with the thru-prop exhaust. I can give more info if needed. I can't seem to find a reliable range for the max RPM at WOT for this motor. I'm trying to get it set up right and need this info. Anyone have any resources?