Honda 250HP BF250DUDA iST Outboard – 30″ Shaft
The 250-horsepower Honda BF250DUDA iST outboard uses a 30-inch shaft for compatible high-transom installations. Its electronic control system supports precise operation, while the shaft length helps maintain propeller depth and efficient thrust transfer.
Description
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Honda 250HP BF250DUDA iST Outboard Motor Specs
| Brand | Honda Marine |
| Full Model Code / Part Number | BF250DUDA (Standard Rotation / iST / 30" Shaft) |
| Country of Origin | Japan / USA |
| Engine Type & Configuration | 4-Stroke SOHC 60° V6 (24-Valve VTEC) |
| Horsepower Output (HP / kW) | 250 HP (184 kW) |
| Displacement (cc / cu in) | 3583 cc (219 cu in) |
| Bore x Stroke (mm / in) | 89.0 x 96.0 mm (3.50 x 3.78 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5300 - 6300 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 | 2.00:1 (Standard Rotation / F-N-R) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | XXL: 30 inches |
| Alternator / Charging Output (Amps / Watts) | 90 Amp (Total / 60 Amp Battery Charging) / 1080 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 86 Octane) / Honda 4-Stroke FC-W 10W-30 |
| Dry Weight (kg / lbs) | 287 kg / 633 lbs |
| Standard Warranty | 5 Years Limited Pleasure Warranty |
Common Question of Honda BF250DUDA
Does BF250DUDA use iST?
Yes. The Honda BF250DUDA uses Intelligent Shift and Throttle for compatible electronic gear selection and throttle commands. Its 250-horsepower four-stroke powerhead uses an electronic fuel injection system, while the 30-inch shaft suits tall-transom boats. This configuration supports a high performance outboard motor installation with compatible helm equipment.
What boats need its shaft?
A boat with a 30-inch transom is the intended application for this UDA model. Measure the hull according to the manufacturer’s procedure before purchase. Correct shaft selection supports cooling-water pickup, gearcase clearance, propeller immersion, steering behavior, and trim performance. Proper measurements are required for this ready to bolt marine installation.
Does it require electronic rigging?
Yes. The iST system requires compatible electronic controls, wiring harnesses, gauges, battery capacity, steering equipment, and correct rigging. Conventional mechanical cables may not provide the intended engine interface. Confirm complete system compatibility before purchase so the Honda 250-horsepower four-stroke powerhead delivers dependable shifting and throttle response.
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