I JUST BOUGHT THIS AND WHEN I WENT RIDING IT, IT FILLED WITH WATER PRETTY QUICK. AFTER PUTTING IT ON THE TRAILER AND LETTING IT DRAIN, I BACKED BACK INTO THE WATER AND THE WATER IS COMING IN FROM THE MID AREA OF THE DRIVE SHAFT. IS THIS SOMETHING I CAN FIX, AND HOW MUCH REMOVAL OF PARTS IS REQUIRED? I AM MECHANICALLY INCLINED, BUT I HAVE NEVER WORKED ON A SKI. PLEASE HELP....THANKS:emoticonc