Yamaha 350HP F350USA DEC Outboard – 30″ Shaft
With 350 horsepower and a 30-inch shaft, the Yamaha F350USA DEC outboard supports compatible offshore installations. Its electronic controls provide precise throttle and shift commands, while the shaft length helps maintain propeller alignment and efficient thrust delivery.
Description
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Yamaha 350HP F350USA DEC Outboard Motor Specs
| Brand | Yamaha Marine |
| Full Model Code / Part Number | F350USA (DEC / 30" Shaft) |
| Country of Origin | Japan / USA |
| Engine Type & Configuration | 4-Stroke V8 (60° V8, DOHC 32-Valve) |
| Horsepower Output (HP / kW) | 350 HP (257 kW) |
| Displacement (cc / cu in) | 5330 cc (325 cu in) |
| Bore x Stroke (mm / in) | 94.0 x 96.0 mm (3.70 x 3.78 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5000 - 6000 RPM |
| Fuel Induction System | Electronic Fuel Injection (EFI) - Multi-Point Sequential |
| Ignition System | TCI Microcomputer |
| Starting System | Electric Start (Digital Electronic Control) |
| Steering System | Digital Electronic Control (DEC) / Compatible with Remote Steering |
| Trim & Tilt System | Power Trim & Tilt |
| Gear Ratio & Shift Mechanism | 1.73:1 (Forward - Neutral - Reverse) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | XXL: 30 inches |
| Alternator / Charging Output (Amps / Watts) | 50 Amp (Maximum) / 630 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 89 Octane Recommended) / Yamalube 4M FC-W 10W-30 |
| Dry Weight (kg / lbs) | 363 kg / 800 lbs |
| Standard Warranty | 3 Years Limited Pleasure Boat Warranty |
Common Question of Yamaha F350USA DEC
What does F350USA DEC provide?
It identifies a Yamaha 350-horsepower outboard with Digital Electronic Control and a 30-inch shaft. DEC requires compatible electronic rigging. Confirm the control head, harnesses, gauges, battery capacity, steering, fuel system, transom strength, and package contents before installing this high performance outboard motor.
What transom fits its shaft?
A 30-inch transom is the intended match for this F350USA configuration. Measure the hull before mounting because incorrect shaft length can affect cooling-water pickup, gearcase depth, propeller immersion, steering response, and trim. Correct measurement supports this ready to bolt marine installation.
Does it use fuel injection?
Confirm the exact Yamaha fuel system before making an EFI claim. The supplied title identifies DEC controls but does not explicitly state fuel injection. Verify controls, wiring, battery, steering equipment, fuel supply, gauges, engine weight, and package contents through Yamaha documentation.
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