Yamaha F115XB 115HP 4-Stroke Outboard – 25in Shaft, EFI

Punishing offshore chop requires the massive reach of the Yamaha F115XB to maintain relentless propeller bite safely. The 1.8-liter DOHC block translates electronic fuel data into immediate thrust, pushing loaded deep-V center consoles across wide bays efficiently. Measuring your exact transom bracket ensures this 115hp extra long shaft outboard fits securely without causing dangerous water pump starvation.

Overcome extreme ocean swells confidently by leveraging the 25-inch extended midsection to drop the gearcase into undisturbed green water. You navigate steep offshore crosswinds while maintaining precise directional control via standard mechanical steering cables. Engineers cast the 175 kg lower unit using advanced anti-corrosion marine aluminum. This thick-wall metal prevents catastrophic structural fatigue when repowering offshore center consoles for continuous saltwater tournament operation.

Key Features of Yamaha F115XB

- 25-Inch Extra-Long Shaft: Reaches deep below elevated offshore transoms, keeping the propeller fully engaged in clean undisturbed water.
- 1.8-Liter DOHC Block: Breathes massive volumes of clean air efficiently, generating 115 horsepower effortlessly to lift heavy fiberglass hulls onto plane.
- Electronic Fuel Injection: Calculates precise fuel requirements continuously, eliminating carburetor hesitation and ensuring crisp throttle response across the 5800 RPM band.
- Hydraulic Power Trim: Adjusts the running angle dynamically via a console switch, optimizing bow attitude across aggressive offshore swells.
- Remote Mechanical Control: Accepts standard mechanical cables directly from your forward helm, integrating flawlessly with classic steering consoles.
- 35-Amp Charging Alternator: Outputs constant electrical current while running, keeping deep cycle batteries topped off for commercial aerators and navigation lights.
- 2.15:1 Gearcase Ratio: Spins aggressive high-pitch propellers efficiently, translating inline-four torque directly into forward vessel momentum.
- Turn-Key Electric Start: Ignites the block instantly via your forward ignition switch, providing car-like starting reliability in freezing weather.
- Anti-Corrosion Finish: Blocks severe galvanic decay physically, protecting the aluminum powerhead block across decades of daily saltwater exposure.
- Clean Four-Stroke Combustion: Eliminates messy two-stroke oil reservoirs, keeping your bilge completely clean while meeting strict clean water standards.

Why Choose Yamaha F115XB

Choosing this specific engine limits installation entirely to 25-inch tall transoms rigged with standard mechanical forward steering wheels. You cannot operate this via a tiller handle safely. Correcting your rigging geometry is a mandatory step when replacing older mechanical outboards.

- Confirm a 25-inch vertical drop from the mounting bracket to the keel line.
- Install corresponding mechanical control cables sized exactly for your specific offshore hull length.
- Avoid heavy smoke and oil slicks using advanced four-stroke internal lubrication.

Ideal Application and Vessel Fitment

This 25-inch remote-steered outboard excels on deep-V center consoles, heavy aluminum offshore fishing boats, and 18-22ft coastal cruisers carrying massive payloads. By integrating a proven 1832cc displacement block with standard mechanical cable controls, the engine acts as an incredibly reliable mechanical workhorse. The extended shaft allows captains to operate safely in massive ocean swells, making this extra long shaft 115hp outboard an absolute necessity for commercial offshore operators and serious tournament anglers.

Warranty, Support and Maintenance

Authorized recreational operation receives a 3-Year Pleasure Warranty alongside exceptional factory support. Registered commercial applications fall under a strict 1-Year Commercial Warranty with zero corrosion coverage applied to the block. Scheduled maintenance requires replacing gearcase lubricants and changing oil filters at manual-specified intervals. Always save all physical service records. Your engine serial number acts as the only way to source exact genuine replacement parts. For product details and order support, Mulmotor offers assistance before your purchase is placed.