Re: hp needed to pull a tube?
Depends on the following:
What kind of boat?
What size boat?
Will that be one adult & one child on the tube, or one adult in the boat & one child on the tube, or one child in the boat & one adult in the tube, or one adult & one child in the boat and no one on the tube, or......
How fast does the tube need to be pulled?
Don't take offense at my smart*** response. I'm being silly 'cause that's what I do.
However, joking aside you will need to answer those questions before we answer yours because it really does depend. Welcome aboard.