ok i just bought a 2000 seadoo xp 951cc. i dewinterized it today it was ideling for about 10 mins then all of a sudden it started shakeing and it looks like it is comeing from the driveshaft im not sure what it is called on the seadoos but it is the shaft comeing from the engine to the the back it is shackeing real bad from where that rubber garment is covering the rear of it anyone know what this could be. thanks i could really use some help here