Yamaha Outboard – F90JB

Jet Drive | 25-Inch Shaft | Remote Control | Electric Start | Power Trim & Tilt

The Yamaha Outboard – F90JB delivers dependable four-stroke power in a jet-drive configuration built for boating in shallow water. Powered by Yamaha’s 1.8L inline four-cylinder platform, the F90JB produces 65 horsepower at the jet pump while providing the smooth acceleration, fuel efficiency, and reliable performance Yamaha outboards are known for.

With a 25" shaft length and remote mechanical control, the F90JB is designed for boats operating in shallow rivers, rocky waterways, flats, sandbars, and other areas where a conventional propeller-driven lower unit may limit access. Its jet pump eliminates the exposed propeller and gearcase below the hull, helping boaters navigate over underwater obstacles and through shallower water.

Why Choose the Yamaha F90JB?

• 1.8L Inline 4-Cylinder Four-Stroke
  Provides smooth, responsive power with strong low- and mid-range torque for dependable acceleration.
• 65 HP Jet Drive Output
  The F90 powerhead delivers 65 horsepower at the jet pump, providing capable shallow-water performance without an exposed propeller.
• Jet Drive Configuration
  Eliminates the traditional propeller and gearcase extending below the hull, allowing greater access to shallow rivers, flats, sandbars, and rocky waterways.
• Electronic Fuel Injection (EFI)
  Precision multi-point EFI delivers the proper amount of fuel for responsive performance, reliable starting, and improved fuel efficiency.
• 25" Shaft Length
  Designed for 25-inch transom applications and boats requiring the additional mounting height associated with Yamaha’s F90 jet-drive configuration.
• Remote Mechanical Control
  Designed for helm-controlled boats using Yamaha-compatible mechanical remote controls for dependable throttle and shift operation.
• Electric Start + Power Trim & Tilt
  Provides convenient engine starting along with easy trim adjustment for changing running conditions.
• Yamaha Gray Finish
  Finished in Yamaha’s traditional Gray color for a clean appearance that matches a wide range of boat styles.
• YDC-30 Aluminum Alloy Construction
  Yamaha’s proprietary aluminum alloy helps provide a lightweight, durable engine platform designed for demanding marine environments.
• Command Link® Compatible
  Supports Yamaha Command Link® and compatible analog gauge systems for engine monitoring at the helm.

The Yamaha F90JB is an excellent choice for boaters who need the reliability and performance of Yamaha’s 1.8L F90 platform with the added shallow-water capability of a jet drive. Its 65 HP jet output, remote control configuration, and 25" transom fit make it especially well suited for river boats, shallow-water fishing boats, and other applications where underwater clearance is important.

Need help choosing your engine? Check out our Yamaha engine guide.

Frequently Asked Questions

Q: How much horsepower does the Yamaha F90JB produce?
A: The F90JB uses Yamaha’s 90-horsepower 1.8L powerhead and produces 65 horsepower at the jet pump.

Q: What is the advantage of the Yamaha F90JB jet drive?
A: The jet-drive design eliminates the conventional propeller and gearcase extending below the hull. This provides additional clearance for navigating shallow rivers, rocky areas, flats, sandbars, and other waters where a standard propeller-driven outboard may be more vulnerable to underwater obstacles.

Q: What shaft length is the Yamaha F90JB?
A: The F90JB is designed for a 25" transom application.

Q: Is the Yamaha F90JB compatible with Command Link® gauges?
A: Yes. The F90JB is Command Link® compatible and can be paired with compatible Yamaha digital or analog gauges depending on the boat’s rigging configuration.

Q: Does the Yamaha F90JB use a propeller?
A: No. The F90JB uses a jet pump rather than a conventional propeller and gearcase. Propeller selection is therefore not required for this model.