+There are a multitude of out-board propellers. They are classified according to diameter and function.
+To each boat its propeller. The models vary depending on the hull, function, weight and engine power. The motor mounting (in height,) may also require a change of propeller.
+Ensure the right propeller in accordance to manufacturer’s advice.
-A propeller which is too long (not too large,) demands too much power and prevents the motors correct acceleration.
-A propeller which is too short (not too small,) will permit motor acceleration but without corresponding optimal boat speed.