What lenght outboard motor do i need for my boat?

Superfly Fruitcake asked: I have Merc 500 50 HP outboard motor and have problems getting my 14 foot tri-hull to plane, it also ***** air sometimes, revving the engine.
Its an old boat and it was cheap so i don’t want to spend a fortune on fixes. I need some guidelines to find out if I [...]

how big a boat would I need to safely cross the channel from poole to the channel islands?

Poo Poo asked: or rather what is the smallest size motor boat that would be safe for that area, and how much would it cost for fuel to cross e.g., poole to guernsey? apart from the fun, would it be cheaper than crossing as a passenger on a ferry for example, much dear, or what? [...]

if i build my own boat in england, do i need to pay to lanch it on a river?

bill little billy sideweakster asked: got a boat building book from 1911, which has a flat botomed marine ply river motor boat design in it, and i reckon i can make one for 200 rips.will i need a license to launch it on the river dee?