Re: A fishing boat and motor light enough for two to carry up and down river bank?
That must be one heck of a river to need a 10 hp to fight the current.
I get in some swift rivers and a 9.5 pushes my 14' jon at 15+ mph.
My uncle fishes the same river in a 15' v hull with a 6 hp, runs 10+ mph.
Really don't think you need that much power.
Keep the weight down. A 25 hp will weigh 125-145# depending on make and model. They are awkward and hard to put on the boat.
6 hp 60#
10 hp 80#
14' jon will weigh between 113 and 190#, depending on make.
You can get the boat, motor, gas, gear, and anchor for between 250-270#.
Bolt an extra grab handle on the outside, about 6' back from the bow, one man on each side and up the hill you go.