Hey I have a 1989 alpha 1 Drive, The motor has been idling rough and not reaching its usual 4600 rpm max. I pulled the boat and noticed that the exhaust bellows has ripped in two from wear and tear. Would this be a cause of rough idle or should I look into other areas for possible diagnosis. I'm going to check the ignition and fuel flow to make sure there might not be several causes for the rough idle and failure to reach my usual max rpm. Any other suggestions you guys would have would be greatly appreciated. Gotta get it ready to put up for sale !!!