BTW, have you checked your poppet recently or just replaced your water pump recently? I'm asking this because I had my water pump replaced this spring. After that I started getting the overheat on my '07 225. Did a lot of research and guys were saying after a water pump replacement the poppet needed to be replaced. Had the online experts at yamahaoutboardparts.com tell me it was my exhaust stack. Replaced the poppet and the overheat went away.