Mercury 20HP F20 4-Stroke Standard Shaft Outboard Motor F20 MH EFI4 Stroke Standard Shaft Manual Start = M Tiller Steering = H Electronic Fuel Injection = EFI Mercury F20MH EFi. Fuel Injected. Standard Shaft, Tiller Controlled with Manual Start Low weight and awesome torque get your boat on plane quicker and provide best ~in ~class acceleration to complement best ~in ~class top speed. A perfect match for aluminum tiller, soft ~hull inflatable, dory, RIB, utility, or sail boats. New Model improvements include