2025 Yamaha Marine In-Line 4 150 HP Base

2025 Yamaha Marine In-Line 4 150 HP Base

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  • Year 2025
  • Make Yamaha Marine
  • Model In-Line 4 150 HP
2025 Yamaha Marine In-Line 4 150 HP Base

2025 Yamaha Marine In-Line 4 150 HP Base

2025 Yamaha Marine In-Line 4 150 HP

In-Line Four

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:

  • 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

Engine

Engine Type Inline 4
Engine Power 150hp @ 5500 rpm
Starter System: Electric
Displacement Mechanical: 2.7L / DEC: 2.8L
Bore 3.70 in (94 mm) / 3.78 in (96 mm)
Stroke 3.79 in (96.2 mm) / 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

Spark Plug

Spark Plug NGK-LFR6A-11 / LFR5A-11

Electric

Alternator Output, Maximum at W.O.T.: 35 / 50 Amp

Fuel System

Fuel System Induction: EFI | Ethanol Blend Limit: 10% Maximum
Fuel Type Recommended: Octane 87 / Octane 89 | Recommended Filtration: Yamaha 10 Micron Fuel/Water Separating Filter (external)

Dimensions

Length Shaft: 20" / 25"
Dimensions Degree of Tilt: 70° | Degree of Trim: -4° through +16° | Mounting Centers: 26"

Capacities

Oil capacity 4.5 L / 4.3 L

Weights

Weight 20" Mechanical - 509 lbs (231 kg) / DEC - 522 lb (237 kg)

Features

Features Intake: 16 | C.A.R.B. Rating: 3-Star

Warranty

Warranty Limited 3 Year Limited Pleasure Boat - 1 Year Limited Commercial

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