I have a 1995 180 50th Anniversary Edition that i just purchased. It has been sitting for a couple of years, i put it on the lake yesterday and it started right up idles great and ran great for about 10 minutes and then started to hesitate or bog down like it was starving for fuel or a serious misfire. If i backed it off to an idle and then accelerated back it would for for a few seconds to minutes then do the same thing. Any input would be helpful. Thanks!