
Description
2026 Yamaha Outboards In-line 4 150 hp
Tampa bay. Lake Superior. The St. Johns River. Wherever you watch the sun rise you’re likely to find a Yamaha In-Line Four. They’re perfect for all kinds of water—and boaters. For more than a decade Yamaha In-Line Fours have been the go-to for boaters who need light, nimble, compact power. The F200 and F150 are available in mechanical, digital with integrated steering, and now Power-Assisted Tiller models. Their proven reliability, unparalleled performance, and versatile technology make them perfect for a broad range of boat styles, hulls, and applications. It’s no wonder that year after year, Yamaha’s In-Line Fours increase in popularity.
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.
Features may include:
Specifications
| Manufacturer | Yamaha Outboards |
| Model | In-line 4 150 hp |
| Year | 2026 |
| Condition | New |
| Trim Name | Base |
| Generic Type (Primary) | Four Stroke |
| Engine Type | Inline 4 |
| Engine Power | Prop Shaft: 150hp @ 5500 rpm |
| Displacement | Mechanical: 2.7L / DEC: 2.8L |
| Bore | 3.70 in (94 mm) x 3.79 in (96.2 mm) |
| Stroke | 3.78 in (96 mm) x 3.79 in (96.2 mm) |
| Compression Ratio | 9.0:1 / 10.3:1 |
| Throttle | Full RPM Range: 5000 ~ 6000 rpm |
| Steering | Angle (maximum): 30° from center, either direction |
| Exhaust | Through Propeller |
| Ignition | TCI Microcomputer |
| Oil Type | Recommended: Yamalube® 4M (See owner's manual) |
| Lubrication | Wet Sump |
| Cooling | Recommended: Thermostatic Control |
| Gear Ratio (Primary) | 2.00:1 |
| Gear Shifter | F-N-R |
| Induction | EFI |
| Spark Plug | NGK-LFR6A-11 / LFR5A-11 |
| Starter | System: Electric |
| Alternator Output, Maximum | Output at W.O.T.: 35 / 50 Amp |
| Fuel System | Ethanol Blend Limit: 10% Maximum |
| Fuel Type | Recommended: Octane 87 / Octane 89 | Recommended Filtration: Yamaha 10 Micron Fuel/Water Separating Filter (external) |
| Length | Shaft: 20" / 25" |
| Dimensions | Degree of Tilt: 70° | Degree of Trim: -4° through +16° | Mounting Centers: 26" |
| Oil capacity | 4.5L / 4.3L |
| Weight | 20” Mechanical 509 lbs (231 kg) | 20” DEC 522 lbs (237 kg) |
| Features | Intake: 16 |
| Warranty | Limited 3 Year Limited Pleasure Boat - 1 Year Limited Commercial |










