Honda 350HP BF350AUCDA iST Outboard – 30″ Shaft
The 350-horsepower Honda BF350AUCDA iST outboard uses a 30-inch shaft for compatible transom heights. Integrated iST control supports precise steering, throttle, and shift commands, while the engine’s output provides substantial propulsion for offshore cruising and fishing.
Description
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Honda 350HP BF350AUCDA iST Outboard Motor Specs
| Brand | Honda Marine |
| Full Model Code / Part Number | BF350AUCDA (Counter Rotation / iST / 30" Shaft) |
| Country of Origin | Japan / USA |
| Engine Type & Configuration | 4-Stroke SOHC 60° V8 (32-Valve VTEC) |
| Horsepower Output (HP / kW) | 350 HP (257 kW) |
| Displacement (cc / cu in) | 4952 cc (302 cu in) |
| Bore x Stroke (mm / in) | 89.0 x 99.0 mm (3.50 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 with Automatic Tilt Support |
| Gear Ratio & Shift Mechanism | 1.79:1 (Counter Rotation / F-N-R) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | XXL: 30 inches |
| Alternator / Charging Output (Amps / Watts) | 90 Amp (Total / Dedicated 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) | 347 kg / 765 lbs |
| Standard Warranty | 5 Years Limited Pleasure Warranty |
Common Question of Honda BF350AUCDA
Does BF350AUCDA use iST?
Yes. The Honda BF350AUCDA uses Intelligent Shift and Throttle with a 30-inch shaft. Its 350-horsepower four-stroke powerhead uses an electronic fuel injection system, supporting a high performance outboard motor installation when compatible electronic controls, harnesses, gauges, battery capacity, steering, and tall-transom measurements are confirmed.
What transom fits its shaft?
A 30-inch transom is the intended match for this UCDA configuration. Measure the hull carefully before purchase and follow the boat manufacturer’s recommendation. Correct shaft positioning supports cooling-water pickup, gearcase clearance, propeller immersion, steering response, and trim. Accurate measurement supports this ready to bolt marine outboard installation.
Does it require electronic controls?
Yes. The iST system requires compatible electronic controls and rigging components rather than ordinary mechanical cables at the engine. Confirm the control head, wiring harness, gauges, battery capacity, steering equipment, and installation requirements before purchase. Complete compatibility is essential for dependable shifting and throttle response.
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