Honda 140HP BF140AK1LDA White iST Outboard – 20″ Shaft
The white 140-horsepower Honda BF140AK1LDA iST outboard uses a 20-inch shaft for compatible lower-transom boats. Electronic iST control supports precise throttle and shift commands, while proper shaft matching helps maintain propeller depth and efficient thrust delivery.
Description
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Honda 140HP BF140AK1LDA White iST Outboard Specs
| Brand | Honda Marine |
| Full Model Code / Part Number | BF140AK1LDA (White / Standard Rotation / iST / 20" 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 (Standard Rotation / F-N-R) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | L: 20 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) | 215 kg / 474 lbs |
| Standard Warranty | 5 Years Limited Pleasure Warranty |
Common Question of Honda BF140AK1LDA White
Is the white LDA iST fuel injected?
Yes. The Honda BF140AK1LDA White uses an electronic fuel injection system and a 140-horsepower four-stroke powerhead. Its white finish identifies the exterior color, while the listed configuration includes Intelligent Shift and Throttle and a 20-inch shaft. This setup suits compatible boats needing a high performance outboard motor.
What transom matches its shaft?
A 20-inch transom is the intended match for this LDA White configuration. Measure the boat according to the manufacturer’s procedure before purchase. Proper shaft positioning supports water intake flow, gearcase depth, propeller performance, steering response, and correct engine trim. Accurate measurements help create a dependable ready to bolt marine installation.
Does it use electronic shift?
Yes. The iST designation identifies Intelligent Shift and Throttle, which uses electronic commands for compatible gear selection and throttle functions. Installation requires matching controls, harnesses, gauges, battery capacity, steering components, and proper rigging. Verify the complete system before installation so the Honda 140-horsepower powerhead operates correctly.
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