360 HP
A 4 hp Mercury outboard, produces a true 4 hp, rated at the prop.
It all depends on how much $ you have to spend.
1 HP electric motor = 1.5 HP hydraulic motor so for a 3 HP electric motor you would need a 4.5 HP hydraulic motor. Also for your information a 1 HP hydraulic motor = 1 2/3 HP gasoline engine.
In older cars 4v = a four barrel carburetor. 2v would be a two barrel and a 1v would be one barrel
1.
If it can be adapted to fit, it is a little more powerful
Put a 12 hp motor on it.
How to get fire on a 115 hp 1996 evinrude motor?
429 cubic inches (7.0 liters)
No.
1 hp = 745.7 watts, so 75 hp = 55.93 kilowatts