Yamaha F115LB2 115HP in White 20″ Shaft

Yamaha F115LB2 115HP 4-Stroke DOHC

The Yamaha F115LB2 pairs a 1.8L L4 DOHC engine with standard rotation, weighing 377 lbs dry — a strong power-to-weight ratio for superior agility. The standard 20-inch shaft is calibrated for fiberglass center consoles and aluminum bay boats needing consistent cooling and hydrodynamic efficiency during high-speed coastal transit.

Peak output holds through the 5000-6000 RPM band via a Multi-Point Electronic Fuel Injection system for optimized volumetric efficiency. The 2.15:1 gear ratio translates mechanical energy from these reliable marine propulsion systems into low-end torque for instantaneous hull planing. US coastal anglers and commercial operators rely on this Japan-engineered platform for reliability navigating unpredictable offshore environments.

Technical Specifications of Yamaha F115LB2

• This outboard uses a robust L4 1832cc DOHC architecture to deliver 115 horsepower efficiently.
• The 171 kg build features a 20-inch shaft for standard high-transom boats.
• Advanced Electronic Fuel Injection guarantees precise combustion across the 5000-6000 RPM wide-open throttle band.
• The 2.15:1 gear ratio provides mechanical leverage for heavy hull thrust.
• Standard right-hand rotation and remote mechanical steering give predictable vessel handling and control.
• The 35-Amp alternator ensures critical navigation displays and sonar equipment remain powered.
• Coverage comes from a 3-year limited factory warranty backed by Japanese manufacturing standards.

F115LB2 DOHC Tech

The 16-valve DOHC configuration within the 1.8-liter inline-four block maximizes air intake flow for rapid, responsive hole-shot acceleration, letting coastal boaters push loaded fiberglass vessels through offshore chop.

Yamaha 115HP EFI

This engine uses Electronic Fuel Injection to optimize combustion cycles, preventing power loss and ensuring instant turnkey starting across varying atmospheric pressures.

4-Stroke 20-Inch Shaft

The 20-inch shaft is calibrated for high-transom vessel dimensions, preventing propeller ventilation while maintaining secure mechanical leverage during sharp turns.

Outboard 115HP Electronics

This engine connects with modern digital helm displays via a certified NMEA 2000 interface, and the 35-Amp alternator generates consistent electrical output for navigation instruments.

Yamaha Factory Warranty

The F115LB2 is protected by a 3-year limited factory warranty covering critical structural or mechanical defects.

Premium Vessel Match

This motor suits modern fiberglass and high-performance aluminum hulls, with a 377 lbs build balancing displacement and planing speed.

Engine Care Protocol

This four-stroke engine requires minimal routine maintenance thanks to its robust internal components and marine alloys. Pro Tip: flush the internal cooling passages with fresh water after every saltwater outing to prevent salt crystallization.