Tohatsu MFS115AETL 115HP EFI 20″ Outboard Motor

The Tohatsu MFS115AETL is a 115hp electronic fuel injection outboard designed with a 20-inch long shaft for mid-size aluminum fishing platforms and fiberglass bay boats. Displacing 1995cc across a naturally aspirated 2.0-liter inline 4-cylinder SOHC 16-valve architecture builds an strong torque curve enhanced by a specialized 4-2-1 Performance Exhaust System to lift pontoon hulls quickly. Eliminating cavitation risks at 178 kg, this 392 lbs midrange motor acts as a heavy ballast stabilizer that firmly balances runabouts during high-speed tracking maneuvers.

Sustaining wide-open throttle execution between 5000 to 6000 RPM allows coastal anglers to bridge expansive open-water bays at rapid cruising velocities safely. Clockwise propeller spin driven by an optimized 2.08:1 gear ratio converts engine crankshaft rotational force into primary engine thrust through high-pitch propeller spin configurations seamlessly. Japan-engineered assembly standards reinforce the internal 4-stroke valve train, ensuring this MFS midrange propulsion platform maintains structural integrity under sustained maximum-load competitive operations.

Thermal Optimization and Engine Block Design

Thermal efficiency increases substantially inside this 392 lbs motor layout because specialized cross-flow cooling paths dissipate cylinder heat rapidly during offshore throttle loading. The engine protects its internal combustion chambers from hot-spot detonation under high-RPM operations.

Precision Electronic Multi Point Fuel Delivery

Fuel induction components pump atomized 87-octane payloads instantly into the 16-valve combustion chambers via electric start lines to maximize hole-shot launching force on big lakes. This digital management configuration eliminates fuel waste during extended variable-speed trolling cycles across deep coastal zones.

High Volumetric Standard Rotation Midrange Gearcases

Clockwise propeller shaft rotation generates clean forward hydrodynamic lifting forces that push heavy pontoon hulls across steep river wakes. The gearcase internal thrust bearings are specifically hardened to withstand forward torsional stress spikes.

Crankcase Oil Protection and Care Protocols

A comprehensive 5-year limited warranty is designed to support peace of mind during extended wide-open throttle operation over deep backwater structures. Severe high-load marine environments mandate strict 4.2-liter oil capacity evaluation schedules with an 84.0 mm by 90.0 mm bore layout and a 41 Amps alternator load to stop microscopic metal friction from compromising internal gear teeth.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.