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Honda BF140ALRA 140HP – 20″ Shaft Standard Rotation Remote Mechanical
Engine Performance: 2.4L inline-4 displacement high-output torque
Fuel Efficiency: PGM-FI electronic fuel injection precision
Shaft and Build: 20-inch shaft silver metallic finish
Control System: Remote mechanical cable throttle system
Marine Protection: Ultimate corrosion resistance saltwater protection
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Description
Honda BF140ALRA 140HP 4-Stroke Mechanical
The Honda BF140ALRA 140HP represents the ultimate in robust mechanical reliability, featuring a high-efficiency 1.5L DOHC inline 4-cylinder architecture for boaters who prefer traditional cable-driven helm control. This 20-inch long shaft model is explicitly designed for aluminum fishing boats and mid-sized runabouts requiring dependable 4-stroke marine propulsion with a familiar tactile feel. Its 16-valve DOHC design ensures smooth power delivery and reduced vibration, providing a refined operating experience that US boaters have come to expect from Honda’s legendary Japanese engineering.
Operational peak performance is managed through the PGM-FI system and Honda’s proprietary BLAST technology, ensuring that 140 horsepower is delivered with immediate hole-shot authority. The BF140ALRA features a specialized 2.33:1 gear ratio and a reliable 40-amp alternator, making it the ideal choice for vessels with essential navigation electronics and multi-battery systems. US boaters consistently choose this mechanical Silver series model for its simplified rigging, impressive power-to-weight ratio, and the durability of its wet sump lubrication system.
High-Efficiency DOHC 1.5L Block
The BF140ALRA utilizes a refined 1.5-liter block to provide exceptional torque and smoother power delivery than many traditional competitors. This balanced 16-valve architecture reduces mechanical stress and vibration throughout the vessel while providing the response needed for rapid acceleration. Captains experience a refined four-stroke quietness with the mid-range pulling power essential for navigating unpredictable coastal inlets or large lake environments with total authority.
Remote Mechanical Reliability
This version of the 140HP Honda is designed for remote mechanical setups, allowing boaters to utilize traditional cable or external hydraulic steering systems for a familiar tactile feel at the helm. This configuration is ideal for repowering projects where existing steering lines and mechanical throttle controls are already in place on mid-sized vessels. Owners gain the advantage of next-generation 4-stroke power and efficiency while maintaining their preferred mechanical interface for technical navigation.
BLAST Hole-Shot Performance
Honda’s Boosted Low Speed Torque (BLAST) technology proactively advances ignition timing during rapid acceleration to get the boat on plane faster. This system eliminates the “dead zone” often found in traditional 4-stroke outboards, providing a hole-shot that rivals many 2-stroke competitors in the 140HP class. Captains gain improved vessel authority, allowing them to carry heavier loads or pull skiers with the confidence of immediate, high-torque thrust from a dead stop.
PGM-FI Induction System
The BF140 utilizes a multi-port Programmed Fuel Injection system that uses a series of sensors to deliver the exact amount of fuel and air required for current atmospheric conditions. This ensures instant, turnkey starts in cold weather and crisp throttle response throughout the entire power band from idle to wide-open throttle. US boaters gain the advantage of industry-leading fuel efficiency and reduced emissions, making it one of the most eco-friendly and cost-effective outboards in its class.
Lean Burn Control Technology
Honda’s ECOmo system utilizes a sophisticated lean-burn technology that adjusts the air-fuel mixture based on real-time speed and load for maximum efficiency. At cruising speeds, the engine operates on a leaner mixture to maximize fuel economy without sacrificing smooth operation or mechanical power. This results in best-in-class fuel efficiency, allowing owners to stay on the water longer and reduce their total cost of ownership at the fuel dock throughout the season.
NMEA 2000 Integrated Networking
This 140HP outboard is fully NMEA 2000 certified, allowing for a seamless digital connection between the engine and your preferred helm electronics. This integration displays critical engine telemetry, including fuel flow, RPM, and temperature, directly on your GPS or multi-function display for real-time monitoring. Boaters gain a higher level of awareness and vessel management, allowing for precise fuel monitoring and proactive maintenance tracking during long transits.
Japanese Marine Durability
Every Honda BF140 is built with the precision and quality control that has made Honda a global leader in 4-stroke technology for over 50 years. From the 16-valve DOHC design to the heavy-duty gearcase, every component is engineered for maximum reliability and minimum vibration. Pro Tip: Utilize Honda’s Genuine 10W-30 marine oil and regular fresh-water flushing to protect the internal 1.5L block and maintain peak cooling system integrity for years of reliable service.
Honda BF140ALRA 140HP I-4 Specs (Silver)
| Brand | Honda Marine |
| Model Name | BF140 Mechanical (Silver) |
| Part Number/SKU | BF140ALRA |
| Technology Category | 4-Stroke DOHC (Non-VTEC) |
| Engine Architecture | L4 1.5L 16-Valve DOHC |
| Shaft Length | 20-Inch (Long) |
| Rotation | Standard Rotation (Right-Hand) |
| Full Throttle RPM | 5000-6000 RPM |
| Fuel Induction | Programmed Fuel Injection (PGM-FI) |
| Alternator Output | 40 Amps Total / 30 Amps Charging |
| Steering | Remote Mechanical |
| Trim System | Power Trim & Tilt |
| Gear Ratio | 2.33:1 |
| Digital Control | No (Mechanical Control) |
| NMEA Interface | NMEA 2000 Certified |
| Dry Weight | 178 kg (392 lbs) |
| Country of Origin | Japan |
| Standard Warranty | 5-Year Limited |
Honda BF140ALRA 140HP Mechanical Technical Guide
The Honda BF140ALRA 1.5L I-4 consumes approximately 12.8 gallons per hour at wide open throttle. Monitoring your gallons per hour rate at 4500 RPM cruise ensures the best balance of efficiency and range for this 20-inch shaft remote mechanical model.
This model utilizes Honda’s four-stage coating process and specialized internal flushing passages. Maintain the sacrificial aluminum anode locations to protect the 20-inch standard rotation housing from electrolysis while moored in saltwater.
A standard oil change for the 1.5L powerhead requires 4.4 US quarts of oil with a new filter. Adhering to the FC-W engine oil capacity is critical for protecting the SOHC valvetrain under traditional mechanical cable operation.
The BF140ALRA alternator provides 40 gross amps to power integrated electronics and ignition. This system requires a battery with a minimum marine cranking amps rating of 800 MCA for consistent ignition.
The BF140ALRA typically operates best with a stainless steel propeller pitch selected to achieve the 5000-6000 RPM wide open throttle window for maximum efficiency.
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