Very thorough joe , thanks guys for the info. Hey Joe, what would be your next move if you were me. The engine starts fine, idles fine and when I leave the dock most of the time it takes of to wot and in five minutes or so while I'm at wot it will jerk like its missing or something. It might just shut off completely from wot. Like you turned the key off! Then I will immediately start it up no problem and for the next 10 attempts it will not go past about a quarter throttle without shutting off and while its shutting off I am pumping the crap out of the primer bulb. Still shuts off. That's why I'm hesitant to buy a fuel pump. When it shuts off there is no alarm! I looked at the timing advance plat and it moves consistantly with throttle lever and sometimes, maybe 1 out of 15 attempts it will make it to wot for a short while. That's why I don't think its the timing advance plate. But when it acts right for 10 min or so at wot it always has this sputter if at full throttle.just one little sputter every bout 10 seconds.now if I back off the throttle just a hair. This sputter quits for a while and engine runs fine until it shuts off again. What do you think......bad power pack ....collapsing pulse hose to fuel pump.....bad fuel pump....bad thermostat? What would make it do these symptoms but every now and then run just fine? I'm going crazy! !!! Lol