Re: 4 hp on 14' fiberglass V Hull boat.
The 4hp design is actually a slightly revised design of the old 3hp of many years past, in my humble opinion a design that would be hard pressed to be improved upon.
However, as with all mechanical machines, things can go wrong at times.
Safety depends on the operator...... a pleasant day with a well tuned engine, coupled with responsible actions emits quite a safety margin. Letting the engine develop problems and ignoring them, coupled with boating in a electrical storm while standing and holding a aluminum staff....... well, that sorta kills the safety aspect of the outing.