I posted a few months ago regarding my little 2.5 Tohatsu just about jerking my arm out of joint when cranking. We tried everything to fix the problem which appeared to be pre ignition. I disassembled the carb, checked the fuel system, inspected the cylinder for carbon buildup, and pulled the flywheel to check the timing. We decided that since the problem was related to ethanol, since the problem began about the time my station put alcohol in the fuel. Well, I bought some gas this weekend that I was able to confirm "ethanol free". Guess what...problem solved. Now if I could get some stimulus money to purchase a new engine that government policy has rendered useless. Useless that is, only if I use the government mandated gasoline.