See Chapter 2. They all have advantages and disadvantages. Outboard motors vary greatly in size and clamp onto the transom. The whole motor pivots on its mounting to aim the wash and steer the boat. The boat turns in the opposite direction the tiller arm is pushed.
Electric motors are outboards.
A rudder is used to steer. Jet motors use an engine to pump water through a nozzle at the stern, which pivots to steer the boat. Remember, when boating in new areas, certain lakes in the state have specific motor size limitations. There are two basic types of boat hulls. Planing hulls are flat-bottomed and skim across the water.