I have read in previous forums that many v8's have issues with back pressure expanding the exaust bellows and therefor an exaust tube is often used instead.<br /><br />My current rig has exhaust bellows and no tube. These bellows aren't horrendously damaged, but are getting old and I am relplacing as a preventative measure. So Question #1: Do I use exhaust bellows or tube?<br /><br />I am sure the answer will probably be either and I will probably go the safest route and use the tube. My next confusion is how the tube seals out water. In mercruiser service man #6 the instructions describe securing the exhaust tube to the gimbal housing with a hose clamp, but there is no mention of securing it to the bellhousing in any way. Even in the illustration it looks like it is just a sleeve that fits over the exaust port in the bellhousing. I am confused how this would reliably seal out water. Why are exhaust bellows connected with two hose clamps on either end, and the exhaust tube with only one?
