Your Online Outboard Motors search is over! The Mercury 4hp outboard motor models are perfect for small fishing boats, small t sized inflatables and sailboat auxiliary power. The Mercury 4 HP outboard engine model # 4MH is compact and lightweight and comes equipped with the short 15 inch shaft, manual start, tiller steering and full forward-neutral-reverse gears with twist grip throttle, Mercury 4hp models feature an integrated 1 liter fuel tank for real portability. External tank connection is standard which makes adding an external fuel tank and line quick and easy.