This just started yesterday running across the lake. I left the dock and everything was fine. I stopped at a spot and fished for about an hour. Wind came up and I started for the other side of the lake , after a few minutes the motor started to misfire (for lack of a better description) running about 1/2 throttle. I stopped and fished a while and pondered what could be wrong. Wind came up and I started for the other side of the lake, ran good for about 5 minutes then same thing . Kinda souinded like running out of gas. I filled the tank before leaving home so I knew I had plenty, I checked the choke to make sure it was open, Ok, I checked the vent valve its open. Made it to the other side and sat and fished for a while, decided to go home. Started and ran fine for about 5 minutes , same thing. I throttled back and creeped along , ran fine. Took the screen off the fuel filter and its ok, So now where do I look and what for?