Honda BF140AK1LDA 140HP Outboard – 20in Shaft, iST

Choose the Honda BF140AK1LDA 140HP Outboard when a bay boat or sport hull needs a 20-inch shaft, digital iST controls, and more output than a 115 HP installation provides. Its 2,354 cc inline four-cylinder DOHC engine uses 16 valves and VTEC technology, producing 140 HP at 5,500 RPM. Honda BF140AK1LDA is a 4-stroke outboard with Programmed Fuel Injection, electric starting, Intelligent Shift and Throttle, and Power Trim & Tilt for compatible digital-rigged boats.

The 472-lb dry weight should be considered during transom planning, repower work, and boat-balance calculations. The engine’s 5,000–6,000 RPM full-throttle range provides a reference for propeller selection and final setup. Its 40-amp alternator supplies 30 charging amps for supported electronics and onboard accessories. The listed 6.7 L engine oil capacity includes filter replacement. Gearcase lubricant specifications, flush procedures, and service intervals should follow the applicable Honda documentation.

Honda BF140AK1LDA iST 20-Inch Outboard for Digital-Rigged Boats

• Mount the 20-inch long shaft on boats designed for compatible standard transoms.
• VTEC Powerhead — produces 140 HP at 5,500 RPM from a 2,354 cc DOHC four-cylinder engine.
• Intelligent Shift and Throttle provides drive-by-wire operation for supported digital helm systems.
• 472 lbs dry weight requires suitable transom capacity and repower balance planning.
• Programmed Fuel Injection manages fuel delivery through the specified 4-stroke engine.
• Power Trim & Tilt adjusts the running position from compatible iST controls.
• 40 amps total with 30 charging amps support marine electronics and accessories.
• The 5,000–6,000 RPM range helps evaluate propeller selection after rigging.

Why Choose the Honda BF140AK1LDA

The iST system gives this 20-inch model a clear role in digital-ready repower projects. Its 140 HP rating provides a higher output target for properly approved bay boats and sport hulls, while electronically managed shifting and throttle keep primary operation at the helm.

• 140 HP supports properly rated sport hulls
• iST controls suit digital-ready installations
• 20-inch shaft fits compatible long transoms

Applications & Use Cases

Honda BF140AK1LDA is intended for bay boats, sport hulls, and other recreational vessels designed for a 20-inch transom and compatible iST rigging. It can be used for fishing, coastal cruising, family boating, and harbor travel when the boat supports the engine’s weight and horsepower.

• Bay boats with digital helm systems
• Sport hulls using 20-inch transoms
• Recreational fishing with iST operation

Warranty, Support & Maintenance

The supplied product information lists a 5-year non-declining standard warranty. Follow the applicable Honda owner’s manual for the 6.7 L oil capacity with filter, gearcase lubricant, filter and spark plug service, cooling-system checks, iST controls, and Power Trim & Tilt. Confirm digital compatibility, warranty registration, and dealer support before purchase.