Outboard Boat, Mid Range Engine | Yamaha Outboards

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Performance Bulletins

Pick a boat and a Yamaha Outboard. See how they perform together. Our Performance Bulletins provide data on hundreds of combinations. Learn more.

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Owner's Manuals

For accurate maintenance and service information, view a Genuine Yamaha Outboard Owner’s Manual. Find the manual for your model

Benefits

Precision Multi-Point Fuel Injection

Fuel Economy

Precision Multi-Point Fuel Injection (except F25) uses individual fuel injectors and a system of on-engine sensors to deliver an optimal fuel/air mixture to each cylinder. F25 models use our PrimeStart™ auto-enrichment system. Both provide easy turnkey starting, smooth acceleration and maximum fuel economy.

Composite Intake Manifold

Powerful Hole Shot

The Composite Intake Manifold, on midranges F90 through F30, features long tube intake tracks, tuned to increase airflow, which boosts low-end and midrange torque. This means 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.

Microcomputer Ignition

Optimum Overall Performance

Microcomputer Ignition, featured in all Yamaha midranges, adjusts timing to maintain optimal engine performance, economy and power under all operating conditions.

Compact, lightweight design

Smart Design

A Single Overhead Camshaft (SOHC), on the F25 through the F70, provides a compact, lightweight, space-saving design that won an Innovation Award from Motor Boating and Sailing magazine.

Precise valve timing control

Precise Valve Timing

Double Overhead Camshaft (DOHC), on the F75 through the F90, features four valves per cylinder. Valves are activated through direct contact with the camshaft, for more precise valve timing control. Rocker arms and their adjustment are eliminated for increased reliability and less maintenance.

C.A.R.B. Three-Star Rated

Ultra-Low Emissions

All of Yamaha’s midranges are California Air Resources Board (C.A.R.B.) Three-Star Rated for Ultra-Low Emissions and meet all federal EPA requirements.

Benefits

Top-Mounted Flywheel

Anti-Corrosive Design

A Top-Mounted Flywheel helps to protect sensitive electrical components from harmful corrosion.

Four Stroke Three-year Warranty

Warranty Protection

All Yamaha four strokes are protected by our Three-Year Limited Warranty for pleasure use. Beyond that, Yamaha Extended Service (Y.E.S.) plans are available, for continued coverage after your three-year factory warranty expires.

Corrosion-resistant alloy

Anti-Corrosive Barrier

Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five electro-deposited, anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha portable four-stroke engines.

Benefits

Precision Multi-Point Fuel Injection

Fuel Economy

Precision Multi-Point Fuel Injection (except F25) uses individual fuel injectors and a system of on-engine sensors to deliver an optimal fuel/air mixture to each cylinder. F25 models use our PrimeStart™ auto-enrichment system. Both provide easy turnkey starting, smooth acceleration and maximum fuel economy.

Single Throttle Valve

Smooth Operation

A simple Single Throttle Valve design is lightweight and allows for quick, easy adjustment. The air silencer box on the F75 and F90 reduces intake air noise to a minimum with the use of a highly porous nylon cloth that soaks up the noise making these engines whisper quiet while the surge tank reduces air turbulence for smoother operation.

Multi-Function Tiller Handle

Ergonomic Control

Yamaha’s award-winning, Multi-Function Tiller Handle is available on all F30~F90 midrange models. These handles feature Variable Trolling Speed (VTS™), allowing you to fine-tune your trolling speed in 50-RPM increments with the touch of a button. The F30 and F40 tiller handle also features an LED light that alerts operators to overheating or low oil pressure.

High Output Alternator

Power to Spare

A High Output Alternator keeps your batteries charging even when you’re running multiple electronics for long periods of time. This allows you to focus on the fishing—not the batteries.

Variable Trolling RPM

Trolling Control

Variable Trolling RPM, available on the F30 up to the F90 models, allows you to fine-tune your trolling speed in 50-RPM increments (between 550 and 1000 RPM depending on the model). Then, lock it in with the touch of a button on an optional Command Link® tachometer or optional Multi-Function Tiller Handle.

Flush engine without running

Easy Engine Flushing

A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and long engine life.

Nitro Assist Tilt on select models

Effortless Tilt

The F25 electric and manual start tiller models and the F30 LEHA model now feature Nitro Assist Tilt. These gas charged struts, similar to those that lift a car hatchback, make tilting almost effortless.