Outboard engines for sale come in many different varieties. You can purchase them new and used. It is not a good idea to purchase used engines. Some of the top brands that manufacture them include General Motors, and Kenmore. The prices go up and down all the time, so be sure you know what you want before looking at the various possibilities.
If you plan on replacing an engine, you may wish to take your search to the next level. There are used motors for sale that were taken apart and reassembled by the owners themselves. These may be less expensive but be very hard to find. However, there is a chance that a used unit you come across my work.
Outboard engines are a great addition to any boat. They have proved their worth time again. There are many brands of engines to choose from. Most manufactures will offer a replacement or repair manual for the engine if you have purchased one used. It is always a good idea to get a mechanic to inspect your engine before purchasing.