foreman

I HAVE A 2004 OZARK 250. I pulled it out after winter and now it is not running right. It starts up fine idles fine and runs fine up to half throttle. As soon as u hit half throttle it just starts dieing(spitting and sputtering). I put some seafoam in the tank and it kinda cleared it up a little(when in nuetral) but as soon as u put it in gear and hit half throttle it runs bad again. any info helpfull.