As of 2015, eBay has the following types of outboard motors: the two-stroke, four-stroke, electric and pump-jet. Outboard motors are quieter and more eco-friendly due to the emissions regulations, claims eBay.
The two-stroke outboard comes in different sizes, enables ease of maneuverability and requires a two-cycle oil mixed with gasoline. The four-stroke outboard can handle larger boats, promotes more power and speed, and produces less smoke and exhaust. The electric outboard comes in handy where gas motors are not allowed, and they are good for trolling and produce no emissions. The pump-jet outboard works well in shallow waters, and it is suitable for jet-skis and swamp boats, according to eBay.