Honda 140hp iST Outboard BF140AK1XDA
$8,532.00
The Honda 140hp iST Outboard BF140AK1XDA is an upgraded 140hp iST outboard with extra-long shaft, delivering precise drive-by-wire control, strong DOHC performance, and reduced maintenance.
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Overview Honda 140hp iST Outboard BF140AK1XDA
The Honda 140hp iST Outboard BF140AK1XDA represents the latest evolution of Honda’s mid-range outboards, combining upgraded durability with advanced Intelligent Shift and Throttle (iST®) drive-by-wire technology. Built with an extra-long 25-inch shaft, this model is ideal for deeper transoms and offshore-style hulls. Engineered by Honda Marine, it delivers smooth digital control, refined power, and long-term reliability.
Features and Performance
- Intelligent Shift & Throttle (iST®) drive-by-wire system for smooth, precise helm control
- 2,354cc 4-Cylinder Engine delivers strong torque with low vibration
- Dual Overhead Cam (DOHC) design improves airflow and high-RPM performance
- Dual-Stage Induction optimizes power delivery across the RPM range
- PGM-FI Electronic Fuel Injection ensures easy starting and crisp throttle response
- Lean Burn Control enhances fuel efficiency during cruising
- Updated Vapor Separator Fastener improves long-term reliability
- Revised Oil Pump & Cylinder Head Gasket Design increase durability and sealing
- 3-Way Cooling System maintains stable operating temperatures under load
- Power Trim & Tilt for effortless trim adjustment and shallow-water maneuvering
- High Output 40-Amp Charging System supports modern marine electronics
- Fresh Water Flush Port & Enhanced Corrosion Protection simplify maintenance and extend engine life
- Variable Speed Trolling provides precise RPM control for anglers
Why You Should Buy it
If you need a 140hp extra-long shaft outboard with advanced digital control and upgraded durability, the BF140AK1XDA is an outstanding choice. Its iST drive-by-wire system delivers smoother shifting and cleaner installation than traditional cable systems, while the DOHC engine provides responsive, fuel-efficient performance. Backed by a 5-year Honda Marine factory warranty, it’s built for confidence, comfort, and long-term value.
| Specification | Details |
|---|---|
| Engine Type | Honda BF140AK1XDA iST Four Stroke |
| Horsepower | 140 HP |
| Cylinders | 4 |
| Shaft Length | 25" (Extra-Long Shaft) |
| Steering | Intelligent Shift & Throttle (iST) |
| Starter | Electric |
| Weight | 494 lbs |
| Displacement | 2,354 cc |
| Full Throttle RPM | 5000 – 6000 rpm |
| Induction System | EFI |
| Cooling System | Water Cooled |
| Trim Range | -4° to +16° |
| Tilt Range | 68° |
| Charging System | 40 Amp |
| Warranty | Honda Marine 5-Year Warranty |
- Honda BF140AK1XDA iST 140hp Outboard Motor
- Power Trim & Tilt System
- 40 Amp Charging System
- Owner’s Manual
Frequently Asked Questions About Honda 140hp iST Outboard BF140AK1XDA
Who is the Honda 140hp iST Outboard BF140AK1XDA aimed at?
The Honda 140hp iST Outboard BF140AK1XDA is designed for boaters who want refined electronic control together with the stated horsepower, shaft length, and offshore-capable setup. The iST configuration is especially useful when buyers are comparing digital control layouts across mid- and upper-range outboards.
How does the iST system change the way this outboard is operated?
This outboard pairs the engine’s stated configuration with Honda’s iST control system, so buyers are looking at both power and a more advanced operating interface. The specifications list 140 HP, Honda BF140AK1XDA iST Four Stroke, 4-cylinder layout, and 2,354 cc to define the mechanical side of that package.
What does the listed shaft and control configuration mean for boat fitment?
This outboard is specified with 25" (Extra-Long Shaft), Intelligent Shift & Throttle (iST), and Electric start, which helps buyers compare transom fit, helm style, and day-to-day handling expectations. The listed trim range of -4° to +16° and tilt range of 68° also adds useful context for operating adjustment and storage position.
How useful is the charging setup in everyday boating?
This outboard includes a stated 40 Amp charging system, which matters when the boat needs support for electronics, batteries, or other onboard loads. Depending on the row, included items such as the owner’s manual may also reduce what needs to be sourced separately.

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