Honda BF250DLDA 250HP – iST 20″ Shaft Standard Rotation

Honda BF250DLDA 250HP iST V6

The Honda BF250DLDA pairs a 3.6L 24-valve SOHC V6 VTEC engine with standard rotation and iST drive-by-wire technology, at 609 lbs dry. The 20-inch shaft is built for primary engine installs on high-performance hulls, part of Mulmarine’s outboard propulsion systems lineup.

Peak output runs at 6300 RPM, supported by iST for seamless vessel management. The 2.00:1 gear ratio is tuned to improve the torque curve for faster planing and stronger hole-shot performance. Built to Japanese standards, this corrosion-resistant unit includes vibration dampening for comfort during offshore saltwater runs.

Technical Specifications of Honda BF250DLDA

• The 3.6L V6 SOHC architecture provides strong displacement for low-end torque and acceleration.
• iST gives precise drive-by-wire control for effortless shifting and throttle synchronization.
• VTEC optimizes intake valve timing at high RPM for stronger power and thermal efficiency.
• Standard right-hand rotation gearcase gives efficient hydrodynamic thrust for high-speed setups.
• The 90-Amp alternator delivers 60 Amps of charging power for critical marine electronics.
• NMEA 2000 certification allows full engine data integration with digital helm screens.
• Power Trim and Tilt allows rapid engine positioning to maximize hydrodynamic efficiency.

VTEC Power Engineering

This iST outboard uses VTEC to shift cam profiles at high RPM, maintaining a flat torque curve for consistent acceleration under heavy offshore loads.

iST Digital Control

The iST system removes mechanical cables for drive-by-wire control, allowing effortless docking in busy harbors.

20-Inch Propulsion Shaft

The 20-inch shaft is built for standard transoms on mid-sized center consoles and recreational sport boats, keeping cavitation minimal.

PGM-FI Fuel Induction

The fuel induction system manages the air-fuel mixture precisely, giving instant throttle response during high-speed runs through coastal inlets.

Limited Honda Warranty

Honda Marine backs this unit with a 5-year limited warranty covering structural and mechanical defects.

High Performance Application

This 20-inch iST V6 fits high-speed center consoles and offshore dual-consoles, delivering sustained thrust through heavy swells.

Maintenance & Longevity

Maintaining oil quality in the wet sump lubrication system is critical for V6 engine endurance. Pro Tip from the Shop: verify the iST digital communication cables stay securely connected and free of moisture to prevent electronic throttle lag.