Grandkids are getting to the age where they want to go tubing. My 1991 20' pontoon with same year 40 Johnson just doesn't have enough power. So ... I found a few newer (for me) pontoons but I'm leary of the motors. 2007 Mercury 90hp 2 stroke and 2005 Evinrude 90 2 stroke. Can anyone tell me the reliability of these motors and if they are expensive to repair? Or should I stick with older outboards? In my search I've found MANY 200? pontoons which have been repowered with motors of the 80's and 90's. This leads me to believe the factory of that era may not be reliable????? Any advice would be welcome ... THANKS