Hello, I have a Honda 40 Hp with the carbs of the 50 hp. The previous owner tried to make it a 50 hp one, but I learned that you need to change the camaxel as well as the electronic box for the ignition as well. Is that correct?. the motor runs fine since I bought it last season, with one problem. When turning the throttle fast to full power the motor takes the gas only delayed or even dies. When turning the throttle slowly with a little bit of feeling it takes the gas fine and reaches full rpm. Now I changed to an original Honda 25 l tank from a smaller tank last season with a thinner fuel hose.<br />The hose with the bigger tank is not original Honda but new and looks fine. The conections to the tank and to the motor are original Honda but not new.<br />Thanks for any help<br />Holger from Berlin