The Tohatsu MFS90AETUL combines genuine Japanese engineering with Tohatsu’s reputation for compact design, fuel efficiency, and long-term reliability. At 90 horsepower, this 4-cylinder EFI four-stroke is one of the most versatile mid-range outboards available — equally at home on bay boats, center consoles, pontoons, and aluminum hulls that need a 25-inch ultra-long shaft for taller transoms or repower applications.
What sets the MFS90AETUL apart from the competition is the platform underneath it. Built on the same 1,995cc, 4-cylinder block that powers the MFS115 and MFS140, this engine inherits the industry-first 4-2-1 Performance Tuned Exhaust manifold — a Tohatsu exclusive engineered to deliver outstanding low-end torque, strong holeshot, and exceptional fuel economy across the entire RPM range. Combined with the unique SOHC-4V cylinder head design (where competitors typically use SOHC-2V or DOHC-4V), the MFS90AETUL produces strong, smooth, and surprisingly quiet performance. At wide-open throttle, fuel consumption is just 7.53 gallons per hour — outstanding efficiency for a 90 HP four-stroke.
The MFS90AETUL is rigged for confident, modern boating. Electric start, power trim and tilt, and full compatibility with remote control systems and Tohatsu’s Multi-Function Tiller Handle make it adaptable to virtually any boat. A high-output 12V, 492-watt, 41-amp alternator easily handles electronics, livewells, lighting, and battery banks without strain. The Tohatsu Onboard Communication System (TOCS) provides plug-and-play integration with onboard accessories, simplifying the installation of multifunctional tachometers, trim meters, and digital displays.
Day-to-day, the MFS90AETUL is built for the kind of practical, real-world performance Tohatsu has been known for since 1956. Adjustable idle and trolling speed lets you fine-tune RPM in five steps between 650 and 850 RPM — ideal for slow-speed maneuvering, controlled trolling passes, or tight-quarters docking. The 2.08:1 gear reduction provides strong thrust and efficient cruising, while a robust gear case and corrosion-resistant construction stand up to saltwater, brackish bays, and demanding service.
With EPA, CARB 3-Star, and EU emissions compliance, the MFS90AETUL meets the strictest clean-running standards while delivering the long-term reliability and low-maintenance ownership Tohatsu owners count on. Whether you’re repowering a coastal fishing boat, rigging a new aluminum hull, or upgrading from an aging two-stroke, the Tohatsu 90 HP outboard offers a rare balance of power, efficiency, and proven Japanese engineering — backed by Northeast Marine for sales, rigging, and ongoing service support.
