Yamaha VF115LB 115HP VMAX SHO Mechanical Outboard 20″

Description

The Yamaha VF115LB is a 115hp standard rotation outboard designed with a 20-inch shaft for multi-engine offshore boats. This 1.8-liter inline-4 platform produces immense structural density through its massive 1832 cc displacement while maintaining an optimized dry weight of 377 lbs to maximize pure marine performance. Engineered explicitly for low-transom configurations, the 20-inch shaft length ensures ideal propeller depth and balanced tracking across heavy-duty fiberglass hulls navigating rough open ocean waters.

Running hard within its 5300 to 6300 RPM range is how this offshore engine sustains incredible cruising speeds across long tournament distances. The heavy-duty 2.15:1 gear ratio converts pure combustion forces into a flat torque curve, ensuring heavy boats pop onto plane without burying the stern under heavy loads. This Japanese-built masterpiece leverages advanced block harmonics to eliminate low-frequency hull vibrations during severe long-range deep-sea operations.

Technical Specifications of Yamaha VF115LB

• Electronic fuel injection utilizes a multi-point sequential track to maximize total thermal efficiency across all cylinders.
• A heavy-duty 35 gross amp alternator generates massive power to keep house battery banks fully topped off.
• The remote mechanical control system replaces old setups with highly responsive vessel tracking adjustments.
• The advanced power trim and tilt mechanism simplifies trailing and shallow-water operation by moving the lower unit out of harm.
• An extensive 3.2-liter oil sump ensures optimal thermal dissipation and continuous lubrication during hard wide-open throttle runs.
• The sport styling lower unit ensures highly optimized hydrodynamic flow and efficient standard clockwise propeller thrust.

DOHC High Performance Architecture

A 16-valve double overhead camshaft design treats the cylinder layout of this inline-4 block to optimize total thermal efficiency. This advanced engineering process shaves critical response lag off the powerhead while drastically improving volumetric efficiency under severe tournament environments.

Sequential Track Fuel Induction

Electronic fuel injection sprays gasoline straight into the intake tracks for clean combustion cycles on 87 octane fuel. This meticulous delivery system guarantees immediate throttle response and flawless cold starts during changing early morning coastal marine conditions.

High Performance Sport Lower Unit

Oversized internal gears and a 2.15:1 gear ratio profile minimize underwater drag at high cruising speeds. This structural configuration mitigates lower-unit gear chatter and ensures smooth power transmission to the hub during tight cornering maneuvers.

Tournament Rigging Control Setup

Digital electronic control systems integrate directly with the mechanical helm components to provide reliable throttle tracking adjustments. This tournament-optimized configuration coordinates with the internal engine loops to maintain crisp engine response across varying water conditions.

Bass Boat Hull Match Application

High-performance bass boats, tournament bay boats, shallow flats boats, and sport aluminum fishing rigs from 16 to 20 feet are targeted. The short shaft delivers exceptional leverage and structural vibration dampening when driving through chop.

Cowling Access And Lubrication

Fast access to critical checking points is provided by a multi-piece outer cowling structure that cuts service times down significantly. Changing the massive internal fluid volume remains completely clean thanks to an engineered drain plug location that prevents spoiling oil. Pro Tip from the Shop: Verify your tournament mechanical cables are adjusted tightly inside the rigging tray every season to prevent throttle slop from clipping your top-end speed.