Yamaha Outboards 90HP F90LB

Description

Overview & Performance

The Yamaha F90LB is part of Yamaha’s latest-generation midrange line-up, offering 90 horsepower through an advanced 1.8-liter, inline-four engine (1,832 cc). It features a single overhead camshaft (SOHC) operating four valves per cylinder, combining lighter weight with improved volumetric efficiency—making it faster, more responsive, and notably more efficient than its predecessor. Yamaha Outboards 90HP F90LB

At just 353 lbs (160 kg), the F90LB is approximately 13 lbs lighter than the previous model and delivers class-leading torque and acceleration.Yamaha Marine Media  Performance testing shows a noticeable uptick in speed—Yamaha claims gains of about 1 mph in top speed and 0.3 seconds quicker acceleration compared to the F90A model. Yamaha Outboards 90HP F90LB

Specifications & Technical Features

• Engine type: Inline-4, 4-stroke, SOHC, 16-valve (4 per cylinder)

• Displacement: 1.8 L (1,832 cc)rjnautical.comjetskiofmiami.comJ.D. Power

• Horsepower: 90 hp (67.2 kW) at ~5,500 rpm

• Weight: 353 lbs (160 kg)rjnautical.comJ.D. PowerYamaha Marine Media

• Shaft options: 20″ (LB model) and 25″ (XB model)rjnautical.com+1yamaha-motor.co.nz

• Fuel system: Electronic Fuel Injection (EFI) rjnautical.comJ.D. Power

• Steering/Controls: Remote mechanical; tiller control optionalrjnautical.com+1

• Starter: Electric

• Trim & Tilt: Power-assisted

• Full-throttle RPM: 5,000–6,000 rpmrjnautical.comJ.D. Power

• Alternator output: 35 A—roughly 40% more than previous models—for superior electrical capacityboatspecialists.comYamaha Marine Media

Convenience & Control Features Yamaha Outboards 90HP F90LB

• Variable Trolling RPM (VTS®): Enables precise trolling speed adjustments in 50-RPM increments (550–1,000 RPM), even allowing operation below idle—a valuable feature for anglers boats Yamaha Marine Media.

• Freshwater Flush Device: Allows engine flushing without starting, enhancing durability and convenience boat.

• Extended Engine Life & Quiet Operation: Incorporates improved muffler design, intake silencer, and engine rigidity to significantly reduce noise—making it quieter at idle and full throttleyamaha-motor.co.nzYamaha Marine Media fish talkma Yamaha Outboards 90HP F90LB

• Compatibility with accessories: Works seamlessly with Yamaha’s Command-Link® and multifunction gauges, NMEA-2000 systems, Talon SDS™ propellers, and Y-COP® security system Yamaha Marine Mediayamaha-motor

Fuel Efficiency & Real-World Performance

Field testing indicates impressive fuel economy: cruising in the upper 20s (mph) at around 4,500 rpm yielded fuel consumption under 5 gallons/hour, translating to approximately 6 mpg. At wide-open throttle near 40 mph, consumption stayed around 9 gph. Notably, the engine is exceptionally quiet at both idle and high speedsfishtalkmag

Further performance testing using a Zodiac Seasport 490 highlighted excellent economy and responsiveness across speeds. For instance, at 4,500 rpm (~34.8 mph), fuel burn was 4.8 gph (≈7.24 mpg). Top speed around 46.5 mph recorded fuel flow at 10.1 Yamaha Outboards 90HP F90LB

Summary & Ideal Applications

The Yamaha F90LB stands out through its superior power-to-weight ratio, fuel efficiency, and a raft of modern conveniences—making it well-suited for mid-sized inshore boats, offshore fishing craft, and multi-species vessels needing reliable, quiet, and controllable performance. Yamaha Outboards 90HP F90LB

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