I winterized my boat last saeason fogged the cylenders, cleaned the plugs, changed the lower unit oil, filled the fuel tank full, and added stabile to the fuel and ran it through the carbs before fogging. Well last night I had the boat out for the first time after starting it on a hose. Started right up idle was fine got it off the trailer loaded up and took off. After running about 1/2 hour at various throttle setting I pulled the throttle back from about 90% to Idle and it died. It did this a couple of times though out the evening. Any Ideas? I'll be back out over the next few days and I'll see if the problem continues.