The Tohatsu MFS25DEFS represents the perfect fusion of Tohatsu’s revolutionary lightweight engineering and electric start convenience in a tiller-steered configuration. At 137 pounds, this Generation D model delivers 25 horsepower with the convenience of electric start while maintaining the direct control and maneuverability that experienced boaters prefer in tiller-steered engines. The electric start system eliminates manual rope pulling, making every outing more accessible and enjoyable while preserving the responsive feel of traditional tiller steering.
Advanced battery-less Electronic Fuel Injection technology ensures reliable operation across the entire 5,000-6,000 RPM range, delivering exceptional fuel efficiency at 2.3 gallons per hour at wide-open throttle while maintaining EPA and CARB 3-Star emission compliance. This sophisticated EFI system provides smooth acceleration, easier cold starts, and superior fuel economy in all conditions. The 500cc displacement with optimized 61mm x 57mm bore and stroke delivers impressive torque characteristics specifically calibrated for efficient 25 horsepower output.
The newly designed torpedo-shaped gear case reduces drag and improves hydrodynamic flow, while repositioned engine mounts minimize vibration for quieter operation. The optimized 2.17:1 gear ratio maximizes low-end torque for efficient planing and excellent hole-shot performance. Engineering improvements include dual water intakes for enhanced cooling, transparent fuel filter with floating indicator ring, and robust 12V, 210W, 17.5A alternator output that keeps batteries charged during extended use.
The MFS25DEFS features Tohatsu’s redesigned standard tiller handle with integrated electric start button, four-step variable idle control (750-1050 RPM), forward-neutral-reverse shifter, throttle friction adjustment, and engine stop switch. The twist-grip throttle provides precise speed control while the 15-inch shaft length makes this motor ideal for aluminum fishing boats, jon boats, skiffs, and smaller recreational craft where close operator control is preferred.
Built for boaters who appreciate both convenience and hands-on control, the MFS25DEFS excels with aluminum boats, fishing applications, and situations where direct tiller steering provides superior maneuverability. Manual recoil starter provides reliable backup starting capability. The included 25-liter fuel tank provides extended range for longer excursions. High-solid paint coating provides superior protection against UV rays and saltwater corrosion. With Tohatsu’s comprehensive 5-year limited warranty and proven Japanese engineering excellence, the MFS25DEFS delivers the perfect combination of modern electric start convenience and traditional tiller control responsiveness for boaters who want the best of both worlds.
