2015 Mercury Marine Outboard engine with 15" (short) shaft length. Four stroke single cylinder carbureted powerhead with a .3 gallon onboard fuel tank. At 40 pounds with its 360 degree steering, this is a very popular space saving small package power option. Tests show that this engine has 32% less tiller arm vibration than competitive brands. Small easy to carry and stow, this is a very popular recreation engine.