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Compact, Lightweight in-line 4-cylinder design is quiet, clean-burning and fuel efficient – with power to spare.
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| 16-Valve Double Overhead Cam . Four valves per cylinder for increased air supply and volumetric efficiency, increasing power and performance. |
| Electronic Multi-Point Fuel Injection is controlled by the ECM (Engine Control Module). Four individual fuel injectors provide the precise amount of fuel for each individual cylinder. Optimal fuel atomization provides better combustion, further enhancing performance and fuel economy. |
| Twin Counter Balancer Shafts minimize engine vibration for a smooth, pleasant boating experience (F150). |
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10mm Offset Crankshaft allows for a larger intake volume design. Four tuned intake tubes boost torque in low and mid speed ranges for quick acceleration. |
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Composite Intake Manifold - The long tube intake tracks are tuned to increase air flow increasing low end and midrange torque performance resulting in a more powerful hole shot and increased acceleration. The air silencer box reduces intake air noise while the surge tank reduces air turbulence for smoother operation. |
| The Microcomputer Ignition , adjusts timing to maintain optimum engine performance, economy and power under all conditions. |
| The New, Multi-Function Tiller Handle , optional on F115, puts easy control at your fingertips in a sleek, ergonomic new design. |
| Yamaha's Award-Winning Innovation continues to revolutionize four stroke technology. |
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Yamaha's Exclusive ACP-221 Paint Process provides a tough, 5-layer barrier against corrosion. It's a key part of our renowned Ultimate Corrosion Protection System that's standard on all Yamaha In-Line Four Stroke engines. |
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Yamaha Four Strokes blend fuel economy with power and performance from 2.5 hp all the way to the F350 V8. |
| Every Yamaha Four Stroke is protected by our 3-Year Limited Warranty for pleasure use. |
| Yamaha's Four Strokes meet all Federal EPA emission requirements. Our entire four stroke line-up (except the F4 and F2.5) has earned a California C.A.R.B. three-star rating for ultra-low emissions. Our F4 and F2.5 models have earned a two-star rating for very low emissions. |
| Extended Trim range delivers better acceleration to plane and top end speed. The tilt range is a full 70° for tilting the engine above the waterline. |
| Freshwater Flush Device allows you to flush the engine without running it, for added convenience and long-engine life. |
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Yamaha is dedicated to helping create a cleaner environment through advances in outboard technology. |
