Yamaha Outboards 4HP | F4LMHA Yamaha’s 139-cc 4-hp portable outboard mirrors the F6, with a couple less horses. It features the same ergonomic, easy-grip starter handle with a built-in decompression device for effortless starts. The F4 also features a built-in fuel tank with the option of switchable access to an additional external tank for amazing extended range. There’s no stopping this little brute. Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle Solid 6-amp alternator Model: F4LMHA Shaft Length: 20″ Weight: 61 Fuel Induction System: Carb Controls: Tiller Starter: Manual Tilt: Manual Cylinders: 1 Displacement: 139cc Prop Shaft Horsepower: 4 hp at 4500 rpm Full Throttle RPM Range: 4000 – 5000 Alternator Output at W.O.T.: 6 Propeller: Aluminum Recommended Fuel: Octane 87 Recommended Engine Oil: Yamalube® 4M Recommended Fuel Filtration: n/a Internal Fuel Tank: Yes