Yamaha F90 Jet Drive 25 in. Mechanical

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Yamaha F90 Jet Drive 25 in. Mechanical in Pine Bluff, Arkansas - Photo 1
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Shallows. Rocky-bottom rivers. Shoals. White-water rapids. They’d all prove treacherous for a propeller-driven outboard, but Yamaha’s Jet Drive outboards are all about it. Available in 150, 115, 60 and 40 horsepower, you can “off-road” without the possibility of breaking a blade on rocks or other underwater obstructions. So, while you may be giving up the prop, you’re gaining a whole lot of freedom with a jet drive.

Our completely redesigned, 1.8-liter F90 Jet Drive outboard produces 65 hp at the pump. Its compact, lightweight SOHC four-cylinder, in-line design features a long-track induction system and Yamaha’s proprietary YDC-30 aluminum alloy. This creates a light, compact, powerful outboard for deck boats and deep-V hulls navigating shallow, rocky rivers, flats and sandbars.

  • 354 pounds (including jet pump assembly)
  • Fits 25-inch transom boats
  • Solid 35-amp alternator
  • Power Trim & Tilt
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Yamaha F90 Jet Drive 25 in. Mechanical

Condition
New
Category
Boat Engines
Model Type
Jet Drive
Model Code
NA
Color
Gray

Convenience and Control

  • INCREDIBLE MANEUVERABILITY: With no gearcase or propeller extending below the hull, a jet drive allows you to maneuver around or pass over obstructions that would limit the travel of a conventional, propped outboard.
  • EASY ENGINE FLUSHING: A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life.

Features

  • Prop shaft horsepower - 65 hp at 5,500 rpm
  • Compression ratio - 10.0:1
  • Recommended fuel - Octane 87
  • Recommended fuel filtration - Yamaha 10-micron fuel / Water separating filter (external)
  • C.A.R.B. rating - 3-Star
  • Intake - 16
  • Spark plug - LFR5A-11
  • Ethanol blend limit - 10% maximum
  • Degree of tilt - 70°
  • Compatible controls - Mechanical
  • Compatible gauges - Command link and analog

Power and Performance

  • FUEL ECONOMY: Precision Multi-Point Electronic Fuel Injection delivers the exact amount of fuel needed for optimum performance and efficiency. Yamaha’s EFI optimizes fuel atomization further enhancing fuel economy.
  • LIGHTWEIGHT, COMPACT DESIGN: Single or Double Overhead Camshaft platforms provide lighter weight, impressive acceleration and better fuel efficiency.
  • INCREDIBLE MANEUVERABILITY: Microcomputer Ignition adjusts timing to maintain optimum engine performance, economy and power under all conditions.
  • POWERFUL HOLE SHOT: The Composite Intake Manifold on Yamaha's Jet Drive F150, F115, F90, F60 and F40 feature long tube intake tracks, tuned to increase airflow. This boosts low-end and midrange torque for 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 smooth, quiet operation.
  • OPTIMUM PERFORMANCE: Microcomputer Ignition adjusts timing to maintain optimum engine performance, economy and power under all conditions.

Reliability & Durability

  • PROTECTION FROM THE ELEMENTS: A proven, one-piece cowling with an Air Intake Labyrinth System easily and efficiently traps and drains water before it enters the engine's intake for maximum reliability.
  • ADVANCED TECHNOLOGY: All jet models are equipped with an Engine Control Module that interfaces with Yamaha Diagnostic System software. This provides a view of selected past and current running conditions, to help technicians provide a complete and accurate diagnosis of your engine.
  • CLEANER FUEL: A large, on-engine water separating fuel filter with a water sensor. Used in conjunction with the Yamaha optional boat-mounted 10-Micron Water Separating Fuel Filter, it helps separate water and contaminants from the fuel before they can reach the outboard's other filters and fuel injectors.
  • CORROSION PROTECTION: Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five™ anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha Jet Drive outboards.

General Information

Manufacturer
Yamaha
Model
F90 Jet Drive 25 in. Mechanical
Model Code
NA
Color
Gray

Electrical

Alternator Output
At W.O.T. - 35A

Engine

Engine Type
Inline 4
Ignition
TCI Microcomputer
Starting
Electric
Exhaust
Through jet nozzle

Measurements

Power
65 Horsepower
Displacement
1,800 Cubic Centimeter
Bore x Stroke
3.19 x 3.5 in. (81 x 88.9 mm)
Shaft Length
25"
Dry Weight
354 lbs

Operational

Steering

Mechanical remote

Angle (maximum) - 35° from center, either direction

Fuel Type
Unleaded
Full Throttle RPM Range
5,000 - 6,000 rpm
Fuel Induction
EFI
Lubrication

Wet sump

Recommended engine oil - Yamalube® 4M (See owner's manual)

Engine oil capacity - 3.4 qt. (3.2 l) / 3.2 qt. (3.0 l)

Cooling
Recommended - Thermostatic control
Gear Ratio
Direct drive
Gear Shift
Forward, Neutral, Reverse
Trim System
Degree of trim - -4 through 16°

Other

Warranty
Limited 2-year pleasure, 2-year government, 1-year commercial

Gallery

Yamaha F90 Jet Drive 25 in. Mechanical in Pine Bluff, Arkansas - Photo 1
Yamaha F90 Jet Drive 25 in. Mechanical in Pine Bluff, Arkansas - Photo 2
Yamaha F90 Jet Drive 25 in. Mechanical in Pine Bluff, Arkansas - Photo 3
Yamaha F90 Jet Drive 25 in. Mechanical in Pine Bluff, Arkansas - Photo 4
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Due to continued challenges across supplier networks as well as increasing logistics costs, product pricing, freight charges, specifications, and features are subject to change at any time without prior notice. Please confirm all information with your local dealership.

Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact the dealer for more details.

  • Price, if shown and unless otherwise noted, represents the Manufacturer's Suggested Retail Price (MSRP) or dealer unit price and does not include government fees, taxes, dealer vehicle freight/preparation, dealer document preparation charges, labor, installation, or any finance charges (if applicable). MSRP and/or final sales price will vary depending on options or accessories selected; contact dealer for more details.

  • Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact dealer for more details.