Re: 3.0 strong enough for 3 person tube?
Yes. I pulled them all day long.
there are 2 kinds of tubes. Those that ride on the water, and one that rides in the water. On the water types, are easy. In the water types I have had some issues with but we still pulled them. I had enough power but I had a tube that submerged if it didn't have 2 bigger kids on it. All other tubes, skiiers, wakeboarders-- no issues.