Honda BF140AXDA 140HP in White iST 25″ Shaft Standard Rotation

Honda BF140AXDA 140HP iST White Digital

The Honda BF140AXDA pairs a 1.5L DOHC inline 4-cylinder engine with the iST digital system, finished in Grand Prix White for high-transom bay boats and offshore cruisers in Mulmarine’s 4-stroke marine engines lineup. Fly-by-wire technology eliminates mechanical friction, giving surgical precision during technical docking maneuvers.

The iST digital command system gives instantaneous throttle response across a 5000-6000 RPM range. The BF140AXDA runs a 2.33:1 gear ratio and a 40-Amp alternator, keeping navigation radar and multi-function displays powered on long transits, with Lean Burn Control and refined DOHC engineering.

Intelligent Shift & Throttle (iST)

The iST system gives a cable-free operating experience through digital signal processing, allowing precise vessel positioning and instant response to input.

Grand Prix White Custom Aesthetic

The Grand Prix White finish matches modern fiberglass and aluminum hulls, engineered to withstand saltwater environments and UV exposure.

High-Efficiency 1.5L DOHC Block

The 1.5-liter block gives strong torque and smoother power delivery than many traditional mid-range outboards, with a balanced DOHC 16-valve architecture that reduces mechanical stress and vibration.

Extra-Long 25-Inch Shaft Authority

Calibrated for high-transom vessel dimensions, the shaft ensures proper propeller immersion in heavy offshore swell, preventing aeration and cavitation during high-speed runs.

Advanced BLAST Hole-Shot Torque

Honda’s BLAST technology advances ignition timing during rapid acceleration, cutting the hesitation common in four-stroke outboards for a quicker hole-shot.

NMEA 2000 Integrated Networking

This engine is NMEA 2000 certified, displaying fuel flow, RPM, and temperature directly on GPS or multi-function displays.

Honda 5-Year Non-Declining Warranty

This engine carries Honda Marine’s 5-year non-declining limited warranty. Pro Tip: use the iST synchronization mode when running twin engines to match RPMs and reduce hull vibration.