I-4 Four Strokes
In-Line Four Strokes
Digital: 200hp, 150hp
Mechanical: 200hp, 150hp
Tiller: 200hp, 150hp
Yamaha’s In-Line 4 (I-4) 200–150 HP outboards deliver a powerful yet lightweight solution for a wide range of boats. With advanced technologies like Variable Camshaft Timing, integrated steering options, and exceptional fuel efficiency, these four-cylinder engines offer smooth performance and reliable power in a compact form. Ideal for anglers, adventurers, and everyday boaters, they combine innovative engineering with Yamaha’s trusted durability.
Compatible Controls for Every Preference
The F200 and F150 are available for mechanical and digital controls and are now even available in Power-Assisted Tiller Models. With 26-inch mounting centers and bolt patterns that match two-stroke models, Yamaha In-Line Fours make it easy to step up or down in horses without having to re-rig.
Power & Performance
Impressive power-to-weight
A proven 16-valve DOHC In-Line design, with four valves per cylinder maximizes efficiency and power. It also streamlines design, giving the F200 impressive power-to-weight.
optimum power
Precision Multi-Point Electronic Fuel Injection and long-track intake system combine to maximize power and fuel efficiency across the line of In-Line Fours.
better charging
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.
quick acceleration
powerful hole shot
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.
Repower Ready
26-inch mounting centers and a bolt pattern that matches previous two strokes make In-Line Fours flexible for most repowers.
New Power-assisted tiller
Our new In-Line Four F150P and F200R Power-Assisted Tiller models make tiller steering these higher horsepowers easier.
Meet the Line-Up
2.8L I-4 200hp
With impressive power-to-weight, volumetric efficiency, and integrated steering, this In-Line Four is the perfect, lightweight 200-hp solution for small- to medium-size boats. Its unique Variable Camshaft Timing (VCT) improves intake and exhaust efficiency and boosts torque throughout the rev range.
- Comes with integrated electro-hydraulic steering for digital models and integrated hydraulic steering for mechanical models
- Runs on economical 89 octane
- Only 525 pounds (20” shaft DEC model)
- 20” or 25” shaft options
- 50-amp alternator provides plenty of power for onboard electronics
- Digital F200 available in signature Yamaha gray, pearlescent white, and classic white
- Mechanical F200 available in signature Yamaha gray
2.8L I-4 150hp
The In-Line Four 150 is one that started it all and it’s more popular than ever. Powerful, light, and compact, it’s mechanical or digital compatible and uses integrated steering, making it more streamlined and responsive than ever before.
- Comes with integrated electro-hydraulic steering for digital models and integrated hydraulic steering for mechanical models
- Only 509 pounds (20” shaft DEC model)
- Available in 20” or 25” shafts
- Powerful 50-amp alternator (2.8-liter digital) or 35-amp alternator (2.7-liter mechanical)
- Digital F150 available in signature Yamaha gray, pearlescent white, and classic white
- Mechanical F150 available in signature Yamaha gray
