Richard Druckman
New member
I've been using my 1990 135 O.B . to ski for many years. Yesterday when I nailed the throttle to pull up a skier, it hesitated , and then made a clunk before it started to accelerate. If I started out a little slower it did not clunk. Up to speed and it ran normal . Fist time with 10 gallons of non ethanol gas added to 15 already in the tank is the only thing different. I'm not sure if the clunk was from the upper or lower unit but I used the boat all day without breaking down. I definitely don't want to use it again until I get it fixed. I bought the boat new and this never happened before. Any ideas ?