Yamaha LF250XSB 250HP – DEC 25″ Shaft Counter Rotationin Gray

Yamaha LF250XSB 250HP Integrated Counter

The Yamaha LF250XSB pairs a 4.2L 24-valve DOHC V6 with counter-rotation gearing and integrated steering, at 529 lbs dry. The 25-inch shaft is built for high-end multi-engine platforms in Mulmarine’s reliable marine propulsion systems lineup that need Integrated Digital Electric Steering (DES) and clean rigging.

Peak output holds through the 5000-6000 RPM band, using Integrated Digital Electric Steering (DES) and Helm Master EX compatibility. The 1.75:1 gear ratio gives the mechanical leverage to turn larger propellers for immediate hull thrust. US offshore boaters get better steering authority and stable tracking with neutralized torque in both open sea and protected harbor conditions.

Technical Specifications of Yamaha LF250XSB

• The V6 4.2L DOHC architecture delivers 250 horsepower with strong volumetric efficiency.
• The 240 kg build runs a 25-inch shaft for offshore transom configurations.
• Integrated Digital Electric Steering (DES) delivers effortless handling and precise control at any speed.
• The counter-rotation (left-hand) gearcase balances steering torque in multi-engine installs.
• Digital Electronic Control (DEC) with Helm Master EX compatibility keeps helm management smooth.
• The 50-70 Amp alternator output keeps navigation radar and digital sonar powered.
• Coverage comes from a 3-year limited factory warranty and Japanese build standards.

Integrated DES Technology

Integrated Digital Electric Steering (DES) gives a smooth, responsive experience without external hydraulic lines, keeping the bilge clean and reducing operator fatigue on long offshore days.

V6 Integrated Command

The 24-valve V6 configuration maximizes air intake and torque, delivering hole-shot acceleration under heavy loads with reduced vibration.

Engine Care Protocol

This digital V6 runs high-quality sacrificial anodes to keep galvanic corrosion in check in saltwater. Pro Tip: flush the internal cooling passages with fresh water after every launch to maintain cooling system integrity.