I sunk my 800 In a pond due to a broken wire. I pulled the spark plugs and turned the engine over to get the water out of the cylinders. I changed the oil a couple times and it doesn't smoke while it's idling or if you barely gas it. But if I dump the throttle, it will put a puff of smoke out. It really doesn't smell like motor oil but it's blue. I'm running marvel mystery oil in my gas. Do I need new rings and pistons?