We also bought the Tohatsu 6HP several months ago and use it about twice a week. It runs perfectly, the only down side is that it takes about 15 pulls to get it started. I follow the instructions to the letter and have tried some varitions. End results is 15 pulls. As it has an integral tank there is no bulb to pressurize the system. Anyone have any suggestions?
Locate some other Tohatsu owners and see if it's a common issue. There may be a fix for it. My first thought that you might have a plugged passageway. Or it may be the work of the EPA. If that is the cause, there may still be an answer...