In Line Four Motor, I4 Benefits | Yamaha Outboards

Find a Dealer

The Yamaha dealer network includes thousands of locations across the U.S. There’s bound to be one near you. Zip and click below to find your nearest Yamaha Outboard dealer.

Advanced Search Options

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.

General FAQs

Have a question? We may already have the answer. Check our FAQs for answers to some of Yamaha’s most-asked questions. We cover topics from ethanol protection to warranties to maintenance. Get the answers.

Owner's Manuals

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


Compact Power

In-line designs with 16-valve, double overhead cams and four valves per cylinder, maximize power in minimal space, and eliminate rocker arms and their adjustments, for increased reliability.

Throttle Response

Variable Camshaft Timing (on VF150 and VF175) delivers incredible throttle response in the low- to mid-RPM ranges for exhilarating hole shot and acceleration.

Fuel Efficient

In-line Four Stroke designs are up to 40% more fuel-efficient than traditional carbureted two strokes.

High Performance

Precision Multi-Point Electronic Fuel Injection is managed by the Engine Control Module, which continually adjusts the fuel/air mix to match engine load and speed.


Reliable Design

In-line designs maximize power in minimal space, and eliminate rocker arms and their adjustments, for increased reliability.

Unbeatable Reliability

The I-4 V MAX SHO® VF150’s Cowling Drain System and Air Intake Labyrinth System trap and drain water that enters the cowling during normal operation.


Extra Space

Four-stroke in-line designs mean there’s no need for an external oil tank. That saves about 28 pounds and leaves more room in the boat for tackle and other items.

Power Trim and Tilt

From hole shot to wide-open throttle, the power trim & tilt on our V MAX SHO® In-Line Fours adjusts the thrust angle of your outboard for maximum performance.

Easy Rigging

I-4 V MAX SHO® outboards feature mechanical controls for easy, convenient rigging with most bass, bay and flats boats, and are compatible with analog, 6Y5 digital or Command Link® gauges.