Yamaha F250XSB 250HP V6 DEC Digital Control 25″ Motor

Description

The Yamaha F250XSB runs 250HP through a 25-inch shaft, built with standard rotation for multi-engine offshore boats. The 4.2-liter V6 displaces 4169cc and weighs 611 lbs dry. Built for deep-V sterns, the 25-inch shaft ensures complete propeller immersion on mid-size offshore vessels in open ocean waters.

This powerhead sustains high-speed cruising across long tournament distances within its 5000-6000 RPM threshold. The 1.75:1 gear ratio translates combustion pressure into a torque curve that lifts wide hulls onto plane rapidly. Built on proven Japanese engineering, this platform is designed for mechanical consistency far beyond standard coastal ranges.

Technical Specifications of Yamaha F250XSB

• Electronic fuel injection delivers precise fuel atomization for complete combustion across the powerband.
• A 70-Amp gross alternator handles the electrical demands of modern multi-display helms.
• Integrated digital electric steering removes traditional hydraulic lines for streamlined rigging and responsive tracking.
• TotalTilt makes trimming easy with a built-in automatic tilt limiter for shallow waters.
• A 6.3-liter oil reservoir keeps components lubricated through long wide-open-throttle runs.
• The standard-rotation lower unit spins clockwise, built for single or primary-engine thrust.

24-Valve V6 Block

The 24-valve DOHC V6 block is engineered to keep the powerhead’s weight down while accelerating thermal dissipation under severe high-load offshore operations.

Electronic Fuel Induction System

Multi-port electronic fuel induction sprays fuel into the intake track for complete combustion on 87-octane fuel. This produces crisp throttle recovery and reliable starting when navigating treacherous inlets or heavy head seas.

Hydrodynamic Lower Gear Housing

Oversized drive gears housed inside a hydrodynamic lower unit keep drag profiles down during high-speed cruising. This engineering dampens gear-shift vibration while maximizing directional tracking on deep-transom multi-engine hulls.

Integrated Electric Steering System

Steer-by-wire deletes external hydraulic lines and valves for uncompromised helm response, coordinating with the high-capacity 70-Amp gross alternator to power critical open-water electronics.

Fiberglass Boat Hull Integration

Mid-size offshore center consoles, walkarounds, runabouts, and high-performance pontoon boats in the 22-30 ft range are a strong match. The 25-inch shaft prevents propeller ventilation climbing massive rollers in rough open-ocean swells.

Rapid Fluid Servicing Access Point

A multi-piece cowling detaches smoothly for quick dipstick checks, and drainage pathways isolate waste fluids for clean oil changes right at the marina slip. Pro Tip from the Shop: connect a freshwater wash hose directly to the upper flushing port after every trip to blast salt crystals out of the cooling jacket without starting the engine.