I have a '86 115 Mariner and I would like some info. I have heard of people that open up the exhaust on their motors. How is this done and does it help it any?
Not a good idea, SBN.<br /><br />2 stroke engines depend on exact tuning of the exhaust extraction for power.<br /><br />Mess with it and you will lose power.<br /><br />Good luck.