boy is my face red.:o after trouble shooting for about an hour, switching coil packs around and what not, it appears that i have a spark plug that works sometimes and sometimes it doesn't. (i can't spell intermittent). it has always been for me a plug was either good or obviously bad. fouled,carbon flake in gap, cracked insulator,etc. this one........anyway, since i've had this problem, a lot of folks are telling me these four strokes do this. one guy said on his yammy he had to change them every fifty hours. i'll be changing mine every seventy five from now own if i keep this boat.Doh