as a 16 year old kid, I was able to make a 10 foot boat plane on 5 hp, but I
had to lay on the bow for nearly a half mile to get it up there. I can't
imagine an adult doing it with 3hp, or 3 hp either.

I have been considering getting rid of my doel type fin and installing a set
of Smart Tabs. During my research on them I ran across an article where
someone installed them on a 10' Zodiac with a 3hp motor. It would plane!
Even the manufacturer was amazed.

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I'd be amazed also. Was anyone onboard at the time or was it running
on remote control?

Maybe with an 80 pound driver :-)