| Manufacturer | |
|---|---|
| Functional | A 10mm Offset Crankshaft allows for larger intake volume design. Four tuned intake tubes boost torque in low and mid-speed ranges for quick acceleration. The Composite Intake Manifold is a lightweight, compact design, making these engines very versatile. Long Tube Intake Tracks are tuned to increase airflow, boosting low-end and midrange torque. This means a more powerful hole shot and increased acceleration. Even with all this responsive power, an air silencer box and surge tank reduce air intake noise and air turbulence for smoother operation. Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five™ electro-deposited, anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha In-Line Four-Stroke engines.26-inch mounting centers and a bolt pattern that matches previous two strokes make In-Line Fours flexible for most repowers. Our entire I-4 series has a user adjustable trolling speed. This allows for precision adjustment of trolling in 50-RPM increments when equipped with a Yamaha digital gauge. Trolling range varies based on model. 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. A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life. Yamaha's Shift Dampener System greatly reduces the noise commonly associated with shifting gears. Using a special design and components, much of the force of shifting is absorbed, resulting in far quieter and smoother operation. |
| Specifications | Engine Type Inline 4 |
. With up to 50-amp alternators, our In-Line Fours provide plenty of power for a range of electronics, which comes in handy, now that they're all compatible with digital controls.){kind=link}