Outboard Engine – Fits Yamaha 250 HP F250 (Replaces F250XB, F250XSB, F250XA, F250A)
Outboard Engine – Fits Yamaha 250 HP F250 (Replaces F250XB, F250XSB, F250XA, F250A) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Outboard Engine – Fits Yamaha 250 HP F250 (Replaces F250XB, F250XSB...
Outboard Engine – Fits Yamaha 250 HP F250 (Replaces F250XB, F250XSB, F250XA, F250A) is backordered and will ship as soon as it is back in stock.
Product Details
The Yamaha F250 4-Stroke Outboard Engine is a 4.2L V6 offshore motor delivering 250 HP, updated for 2021 and beyond. It features advanced digital electronic controls (DEC), the convenient TotalTilt™ system, and Thrust Enhancing Reverse Exhaust technology for superior performance and handling on a wide range of boat types.
This engine serves as a direct upgrade or replacement for current digital models (F250XB/F250XSB) and previous generation mechanical versions (F250XA/F250A).
- Features user-friendly Digital Electronic Controls (DEC) for smooth shifting and throttle response.
- Integrated Digital Electric Steering provides effortless and responsive handling.
- The TotalTilt™ function allows for quick, complete tilting with a simple double-tap of the trim button.
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | Variant | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F250 | 250 | 4-Stroke | 2021+ | F250XSB | Digital Electronic Control, 25" shaft |
| Yamaha | F250 | 250 | 4-Stroke | 2021+ | F250USB | Digital Electronic Control, 30" shaft |
| Yamaha | F250 | 250 | 4-Stroke | 2021+ | F250ESB | Digital Electronic Control, 35" shaft |
| Yamaha | F250 | 250 | 4-Stroke | 2021+ | F250XB | Mechanical Control, 25" shaft |
| Yamaha | F250 | 250 | 4-Stroke | 2004–2020 | F250XA | Previous generation 4.2L V6 |
Technical Specs
- Product Type
- V6 Outboard Engine
- Engine Type
- 24-valve DOHC with VCT, V6
- Displacement
- 4.2L
- Bore x Stroke
- 96 x 96mm (3.78 x 3.78 in)
- Rated Output
- 250 HP at 5500 RPM
- Full Throttle RPM Range
- 5000-6000 RPM
- Fuel Induction System
- Electronic Fuel Injection (EFI)
- Alternator Output
- 50-70 Amp (varies by model)
- Weight
- 250-265 kg (551-588 lbs) depending on shaft length
- Compression Ratio
- 10.3:1
- Recommended Fuel
- 87 Octane (regular unleaded)
- Lubrication
- Wet Sump
- Engine Oil Capacity
- 6.3L/6.0L with filter
- Cooling System
- Thermostatic Control
- Ignition
- TCI Microcomputer
- Starting System
- Electric
- Shaft Length Options
- 25" (X), 30" (U), 35" (UU) - DEC models only for 30"/35"
- Gear Ratio
- 1.75:1
- Controls
- Digital Electronic (DEC) or Mechanical
- Tilt System
- Power Trim & Tilt with TotalTilt™ feature
- Steering
- Integrated Digital Electric Steering (DEC models)
- Warranty
- 3-Year Limited Pleasure, 3-Year Government, 1-Year Commercial
What’s in the Box
- Complete outboard engine assembly
Installation Notes
- Ensure the boat's transom is clean, structurally sound, and rated for the engine's weight and horsepower.
- Carefully lift and mount the engine onto the transom, ensuring it is centered and at the correct height.
- Secure the engine with the provided mounting bolts and torque them to the manufacturer's specifications.
- Connect the digital electronic control (DEC) box, throttle and shift cables, and electrical harnesses.
- Connect the fuel line from the boat's tank to the engine.
- If applicable, connect the hydraulic or digital electric steering system.
- Install a compatible propeller, ensuring the prop nut is properly torqued.
- Add the correct type and amount of engine oil and fuel.
- Perform pre-start checks, including testing control functions and looking for any leaks.
- Start the engine in a well-ventilated area or in the water, and check for proper operation at idle.
Troubleshooting & FAQ
What is the difference between the F250XSB and F250XB models?
The primary difference is the control system. The F250XSB uses Digital Electronic Controls (DEC) for fly-by-wire shifting and throttle, while the F250XB uses traditional mechanical controls. The DEC models also feature integrated digital electric steering.
Can this engine replace an older F250XA model?
Yes, the 4.2L V6 platform is a direct replacement for the previous generation F250XA. However, upgrading from a mechanical control model to a DEC model will require a new control system, wiring harnesses, and gauges.
What is the TotalTilt™ feature?
TotalTilt™ is a Yamaha-exclusive feature that allows for faster, more convenient tilting of the outboard. With a simple double-tap of the up or down trim button, the engine will tilt completely up or down until it reaches the trim rams, simplifying trailering and storage.
What are the maintenance intervals for this engine?
Refer to the owner's manual for the full service schedule. Typically, this includes an initial 20-hour break-in service, followed by service every 100 hours of operation or annually, whichever comes first.
What kind of fuel should I use?
This engine is designed to run on regular unleaded 87 octane gasoline. Using fuel with a lower octane rating can cause engine knocking and potential damage.
What makes the Digital Electric Steering different?
Unlike conventional hydraulic steering, the Integrated Digital Electric Steering is a self-contained system built into the engine. It offers a cleaner rigging tube, uses less power, and provides smooth, precise steering control without the need for hydraulic lines or pumps.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
