This article needs additional citations for verification. Please help improve this johnson boat motor manual pdf by adding citations to reliable sources. Unsourced material may be challenged and removed. An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom.
They are the most common motorized method of propelling small watercraft. As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the direction of thrust.