Honda 140HP BF140AXCDA iST Outboard – 25″ Shaft
The 140-horsepower Honda BF140AXCDA iST outboard uses a 25-inch shaft for compatible transoms. Electronic control supports precise throttle and shift operation, while correct shaft matching helps maintain propeller position and efficient thrust transfer.
Description
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Honda 140HP BF140AXCDA iST Outboard Motor Specs
| Brand | Honda Marine |
| Full Model Code / Part Number | BF140AXCDA (Counter Rotation / iST / 25" Shaft) |
| Country of Origin | Japan / USA |
| Engine Type & Configuration | 4-Stroke DOHC 16-Valve Inline 4 (VTEC) |
| Horsepower Output (HP / kW) | 140 HP (103 kW) |
| Displacement (cc / cu in) | 2354 cc (144 cu in) |
| Bore x Stroke (mm / in) | 87.0 x 99.0 mm (3.43 x 3.90 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5000 - 6000 RPM |
| Fuel Induction System | Programmed Fuel Injection (PGM-FI) |
| Ignition System | Microcomputer Controlled Transistorized |
| Starting System | Electric Start with Intelligent Shift & Throttle (iST) |
| Steering System | Electronic Remote Control / iST Compatible |
| Trim & Tilt System | Power Trim & Tilt |
| Gear Ratio & Shift Mechanism | 2.14:1 (Counter Rotation / F-N-R) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | XL: 25 inches |
| Alternator / Charging Output (Amps / Watts) | 40 Amp (Total / 30 Amp Battery Charging) / 480 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 86 Octane) / Honda 4-Stroke FC-W 10W-30 |
| Dry Weight (kg / lbs) | 225 kg / 496 lbs |
| Standard Warranty | 5 Years Limited Pleasure Warranty |
Common Question of Honda BF140AXCDA
What does counter rotation mean?
Counter rotation means the propulsion unit is configured to rotate opposite a standard-rotation unit in a paired installation. The BF140AXCDA also includes iST controls, electric start, and a 25-inch shaft. Its counter rotating lower unit can help balance twin-engine torque, but boat and rigging compatibility must be confirmed.
Does it use electronic fuel injection?
Yes. The BF140AXCDA uses an electronic fuel injection system within its 140-horsepower four-stroke powerhead. Intelligent Shift and Throttle manages compatible electronic commands, while electric start supports convenient operation. Verify counter-rotation requirements, harnesses, controls, battery capacity, gauges, steering equipment, and mounting position before installation.
What transom fits its shaft?
A 25-inch transom is the intended fit for this XCDA configuration. Measure the hull carefully and follow the boat manufacturer’s recommendation. Correct shaft placement supports cooling-water pickup, gearcase clearance, steering control, and counter-rotation performance. This is a ready to bolt marine package only when correctly matched.
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