Yamaha 250HP F250USB DEC Outboard – 30″ Shaft
With 250 horsepower, DEC controls, and a 30-inch shaft, the Yamaha F250USB supports compatible offshore installations. Its electronic control system assists accurate operation, while the shaft length helps maintain proper propeller position and thrust transfer.
Description
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Yamaha 250HP F250USB DEC Outboard Specs
| Brand | Yamaha Marine |
| Full Model Code / Part Number | F250USB (DEC / 30" Shaft) |
| Country of Origin | Japan / USA |
| Engine Type & Configuration | 4-Stroke V6 (DOHC 24-Valve with VCT) |
| Horsepower Output (HP / kW) | 250 HP (184 kW) |
| Displacement (cc / cu in) | 4169 cc (254 cu in) |
| Bore x Stroke (mm / in) | 96.0 x 96.0 mm (3.78 x 3.78 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5000 - 6000 RPM |
| Fuel Induction System | Electronic Fuel Injection (EFI) - V6 VST |
| Ignition System | TCI Microcomputer |
| Starting System | Electric Start (Digital Electronic Control) |
| Steering System | Integrated Digital Electronic Steering (DES) / DEC |
| Trim & Tilt System | Power Trim & Tilt |
| Gear Ratio & Shift Mechanism | 1.75:1 (Forward - Neutral - Reverse) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | XXL: 30 inches |
| Alternator / Charging Output (Amps / Watts) | 70 Amp (Maximum) / 840 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 89 Octane Recommended) / Yamalube 4M FC-W 10W-30 |
| Dry Weight (kg / lbs) | 257 kg / 567 lbs |
| Standard Warranty | 3 Years Limited Pleasure Boat Warranty |
Common Question of Yamaha F250USB DEC
What does F250USB DEC provide?
It identifies a Yamaha 250-horsepower outboard with Digital Electronic Control and a 30-inch shaft. DEC requires compatible electronic rigging. Confirm the control head, harnesses, gauges, battery, steering, fuel system, transom strength, and package contents before installing this high performance outboard motor configuration.
What transom fits its shaft?
A 30-inch transom is the intended match for this F250USB model. Measure the hull before purchase 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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