Mercury 115EXLPT 115HP – Command Thrust Four Stroke 25-Inch Shaft

Mercury 115EXLPT 115HP Command Thrust

The Mercury 115EXLPT Command Thrust is a high-authority 115HP FourStroke outboard designed to deliver unrelenting pushing power for high-transom vessels in the US maritime market. Featuring a 2.1L inline four-cylinder 8-valve SOHC architecture and a dry weight of 363 lbs, this engine generates phenomenal displacement-driven torque. This 25-inch extra-long shaft model utilizes an oversized 2.38:1 gearcase and standard rotation, making it a critical asset for offshore center consoles and large barges. Our reliable marine outboard engines provide the mechanical dependability necessary for rigorous coastal operations.

Maximum operational performance for the Mercury 115HP CT is seamlessly maintained within the 5000 to 6000 RPM full throttle band. The 2.38:1 Command Thrust gear ratio provides a massive mechanical advantage, turning a V6-sized propeller to translate the 2.1L torque into rapid hole-shot acceleration. Proudly manufactured in the USA, this highly corrosion-resistant marine engine incorporates advanced vibration dampening to ensure a quiet and smooth ride across choppy American coastal waters.

Technical Specifications of Mercury 115EXLPT CT

• The 2.1L inline four-cylinder SOHC architecture delivers massive displacement for heavy payload hauling and towing capability.
• Command Thrust 2.38:1 gear ratio allows the engine to swing a larger propeller, minimizing slip and maximizing hydrodynamic lift.
• Multi-Port Electronic Fuel Injection accurately manages the air mixture for incredible fuel induction efficiency.
• The 25-inch extra-long shaft provides deep propeller immersion for high-transom offshore and commercial applications.
• An integrated 35 Amp alternator ensures your onboard marine electronics and navigation lights remain fully charged.
• SmartCraft PCM 07 ignition delivers precise spark timing across the entire power band for smooth, reliable running.

2.1L SOHC Displacement

The large 2.1L displacement of this inline-four powerhead means less stress on the engine to produce its 115 horsepower. This “less work, more power” philosophy translates to exceptional durability, incredible low-end grunt, and improved thermal efficiency during long offshore transits.

Oversized Command Thrust

The 2.38:1 Command Thrust lower unit is built to tackle the heaviest loads. By sitting deeper in the water and spinning a larger prop, it offers unmatched authority in rough water, pulling heavy fiberglass hulls onto plane with ease and holding them there at lower speeds.

Extra-Long 25-Inch Shaft

The 25-inch shaft ensures the oversized propeller operates at the optimal depth for maximum hydrodynamic grip on high transoms. This specialized design prevents cavitation and maintains consistent forward thrust on deep-V hulls navigating through rough coastal bay waters.

Multi-Port EFI System

Mercury’s advanced Electronic Fuel Injection continuously monitors atmospheric variables to deliver the perfect fuel ratio. This guarantees instant throttle response and prevents engine bogging during rapid acceleration scenarios while navigating tricky coastal inlets.

Mercury Factory Warranty

Every Mercury 115HP outboard is backed by a standard 3-Year Limited Warranty for US owners. This factory-level protection ensures long-term peace of mind and grants access to genuine parts through a vast nationwide marine dealer network.

High-Transom Offshore Match

This 25-inch Command Thrust outboard is the ultimate power solution for large aluminum barges and heavy fiberglass walkarounds. It provides the sustained high-end thrust needed for navigating difficult coastal tidal flows while remaining highly fuel-efficient.

Maintenance & Longevity

Maintaining clean oil in the 5.2L wet sump lubrication system is vital for preserving tight engine tolerances over time. Always flush the cooling system with fresh water after every saltwater outing. Pro Tip from the Shop: Always verify that the Power Trim and Tilt hydraulic fluid is topped off and thoroughly grease the extended length steering tube to guarantee smooth lifting and steering action on high-transom applications.