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4 HP Our 139-cc 4-hp portable outboard mirrors our OHV 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. Only 60 pounds (15” shaft model) Available in 15” and 20” shaft lengths Solid 6-amp alternator
| Horsepower | 4 HP |
|---|---|
| Brand | Yamaha |
| Model | F4SMHA |
| Type | Outboard Motor |
| Power Category | Portable |
| Condition | New |
| Displacement | 139cc |
| Engine Type | 1 cyl |
| Recommended Cooling | Thermostatic Control |
| Ignition | CDI |
| Starting Method | Manual |
| Fuel Induction | Carb |
| Compression Ratio | 8.9:1 |
| Bore x Stroke | 62 x 46mm (2.44 x 1.81in) |
| Weight | 60 lbs |
| Shaft Length | 15" / Manual Start / Tiller |
| Gear Ratio | 2.08:1 |
| Tilt Positions | 69° |
| Power Trim & Tilt | Manual |
| Fuel Type | Octane 87 |
| Recommended Oil | Yamalube® 4M (See owner's manual) |
| Lubrication | Wet Sump |
| Controls | Tiller |
| Full Throttle RPM Range | 4000 ~ 5000 |
| Gear Shift | Forward, Neutral, Reverse |