Mercury 115ECXLPT 115HP – Command Thrust Counter Rotation 25-Inch

Mercury 115ECXLPT 115HP Command Thrust

The Mercury 115ECXLPT is a high-authority 115HP FourStroke outboard featuring the renowned Command Thrust gearcase for superior heavy-load pushing power in the US coastal market. Boasting a 2.1L inline four-cylinder SOHC architecture and weighing 363 lbs, this engine offers an power-to-weight ratio for mid-to-large vessels. This 25-inch extra-long shaft model is configured for counter-rotation, making it the appropriate port-side companion for dual-engine offshore center consoles. Our dependable outboard propulsion systems provide the trusted mechanical simplicity necessary for reliable everyday maritime operation.

Maximum operational performance for this Mercury 115HP is achieved across the 5000 to 6000 RPM range, utilizing Multi-Port EFI for advanced thermal efficiency. The heavy-duty 2.38:1 Command Thrust gear ratio is strategically designed to improve the torque curve, turning a larger propeller for faster planing and superior hole-shot performance in heavy offshore swells. Engineered in the USA, this corrosion-resistant outboard includes advanced vibration dampening for the comfort required during rigorous offshore salt-water missions.

Technical Specifications of Mercury 115ECXLPT

- The 2.1L 8-valve SOHC architecture provides displacement for offshore low-end torque curves under heavy loads.
- Command Thrust 2.38:1 gearcase allows the use of V6-class propellers for heavy-water thrust and lift.
- Counter rotation left-hand drive helps support perfectly balanced steering and tracking in dual-engine offshore boat setups.
- Multi-Port Electronic Fuel Injection dynamically adjusts the fuel mixture for thermal efficiency and commercial fuel economy.
- A robust 35 Amp alternator keeps complex onboard utility lights and modern marine navigation equipment fully charged.
- SmartCraft PCM 07 Digital Inductive ignition helps support reliable firing and smooth idling in the coldest offshore maritime conditions.

2.1L Four-Stroke Architecture

The 2.1L inline four-cylinder SOHC design maximizes combustion efficiency and structural rigidity. This translates into reliable low-end torque that commercial mariners depend on when hauling heavy fishing gear through dense coastal marshlands and strong, unpredictable tidal currents.

Command Thrust Gearcase

The defining feature of this 115HP outboard is the oversized Command Thrust lower unit. Operating at a 2.38:1 ratio, it sits deeper in the water and spins a much larger prop. This minimizes prop slip and maximizes hydrodynamic bite, easily lifting heavy fiberglass center consoles onto plane.

Counter Rotation Propulsion

The 25-inch extra-long shaft is paired with a counter-rotation gearbox to negate steering torque in dual-engine installations. This improves hydrodynamic efficiency and allows the offshore vessel to track perfectly straight with minimal steering effort at the helm.

Multi-Port EFI Precision

Mercury’s Multi-Port Electronic Fuel Injection continuously monitors atmospheric variables to deliver the appropriate air-fuel ratio. This is designed to support instant throttle response and prevents engine bogging during rapid acceleration scenarios while navigating tricky channels in the American saltwater marine environment.

Mercury 3-Year Warranty

This 115HP Command Thrust outboard is backed by a comprehensive 3-Year Limited Warranty for American owners. This factory-level protection helps support long-term peace of mind and grants access to genuine parts through a vast nationwide marine dealer network.

Dual Engine Offshore Match

This counter-rotation mechanical outboard is a practical port-side power solution for mid-sized offshore center consoles and deep-V walkarounds. It provides the sustained high-end thrust needed for navigating difficult coastal tidal flows while remaining fuel efficient.

Maintenance & Longevity

Regular inspection of the 5.2L wet sump lubrication system is critical for maintaining internal engine tolerances over years of heavy use. Always flush the cooling system with fresh water after every saltwater excursion.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.