The Yamaha 2 is not the same as the 15. I have both. The two is a PITA. Little Metal clips that rust out to nothing. The fuel tanks is miserably small. The throttle knob and the handle on the control arm easily came off. It's quite sensitive to the mixture. Right now mine runs better using the choke then the throttle lever. I've cleaned the bowl and the fuel lines, cleaned the orifice for the carb and still the same thing. For pics and a discussion of the clips I've detailed it some in my blog: http://www.svelysium.net/blog/?p=2640

I would not buy one again. I would look at alternatives. It may be the best of the small engines but I would still look.

Go Slow
Sail Far
Stay Long