i have a 2008 see doo challenger. we jst got it last summer in july and used it almost every weekend and never had a problem with it. it was running great right before we had it winterized for the winter. when we pulled it back out for the first time this year it had a lack of accleration, top speed and overall performance. we have already changed the plugs and gaps are set to the correct spacing does anyone know what else the problem could be? i believe it only has 30 - 40 hours on engine.