Yamaha 350HP LF350XSA DEC Counter Rotation Outboard – 25″ Shaft
Designed with 350 horsepower, DEC controls, counter-rotation, and a 25-inch shaft, the Yamaha LF350XSA supports compatible twin-engine applications. Electronic controls enhance command precision, while counter-rotation helps balance propulsion forces during offshore acceleration and maneuvering.
Description
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Yamaha 350HP LF350XSA DEC Counter Rotation Outboard Specs
| Brand | Yamaha Marine |
| Full Model Code / Part Number | LF350XSA (Counter Rotation / 25" 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 (Counter Rotation Forward - Neutral - Reverse) |
| Exhaust System | Through Prop Hub |
| Recommended Transom Shaft Length | XL: 25 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) | 355 kg / 783 lbs |
| Standard Warranty | 3 Years Limited Pleasure Boat Warranty |
Common Question of Yamaha LF350XSA
Is LF350XSA counter rotating?
Yes. The Yamaha LF350XSA is specified as a DEC counter-rotation 350-horsepower outboard with a 25-inch shaft. Its counter rotating lower unit is intended for compatible paired-engine applications. Confirm propeller specification, engine pairing, DEC controls, steering, battery, wiring, and boat compatibility before installation of this high performance outboard motor.
What transom fits its shaft?
A 25-inch transom is the intended match for this LF350XSA model. Measure the hull according to Yamaha’s instructions before mounting because incorrect shaft length can affect cooling-water pickup, gearcase clearance, propeller immersion, steering response, and paired-engine balance. 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 and counter rotation but does not explicitly state fuel injection. Verify controls, wiring, battery, steering equipment, fuel supply, gauges, propeller, engine weight, and package contents before installation.
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