Tohatsu America Corp., which distributes Tohatsu outboards in the United States, said it is debuting its MFS20E, MFS15E and MFS9.9E four-stroke, battery-less EFI outboard motors this fall.

They will be available in early September. Tohatsu calls the motors the lightest in their class.

“The weight is the most important factor for small-horsepower outboards, as it directly affects the performance of the boat due to a higher power-to-weight ratio,” Isami Hyuga, president of Tohatsu Corp., said in a statement.

“Our newly developed models are not only the lightest in each of their respective horsepower categories, but we also succeeded in dramatically reducing sound level and vibration, compared to the previous version. Moreover, it’s simply superior in performance. We believe that we have achieved in developing the best product in its horsepower class.”

The new motors were developed from the same “Light Weight ECO Sport” design concept as Tohatsu’s MFS50/40 models. Moving heavier components such as the crankshaft and driveshaft 30mm forward, compared with the previous model, results in a reduction of the tilting weight by 26 percent, Tohatsu said. The motors are backed by the company’s five-year warranty.

“We have faced a lot of difficulties, seeing as we were aiming for the highest standards,” said Toshihiro Kudo, director and general manager of the engineering department for Tohatsu Corp. “In the end all of this allowed us to develop a model that is lightweight and compact, yet runs with exceptional power.”