Honda 350HP BF350AUDA iST Outboard – 30″ Shaft
Delivering 350 horsepower, the Honda BF350AUDA iST outboard uses a 30-inch shaft for compatible offshore boats. Its electronic control system supports precise operation, while proper shaft length helps maintain propeller depth and efficient thrust transfer.
Description
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Honda 350HP BF350AUDA iST Outboard Motor Specs
| Brand | Honda Marine |
| Full Model Code / Part Number | BF350AUDA (Standard 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 (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 / 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 BF350AUDA
Does BF350AUDA use iST?
Yes. The Honda BF350AUDA is specified with Intelligent Shift and Throttle and a 30-inch shaft. Its 350-horsepower four-stroke powerhead uses an electronic fuel injection system, providing a high performance outboard motor configuration for compatible tall-transom boats with properly matched controls, harnesses, gauges, battery, and steering.
What boats need a 30-inch shaft?
Boats with a matching 30-inch transom are the intended application for this AUDA model. Measure the hull carefully before purchase and follow the manufacturer’s recommendation. Correct shaft depth supports cooling-water pickup, gearcase placement, propeller immersion, steering response, and trim. Accurate measurement is required for this ready to bolt marine package.
Does it require iST rigging?
Yes. Intelligent Shift and Throttle 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 installation so the Honda 350-horsepower powerhead operates correctly.
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