Yamaha F25SMHC Outboard Motor. 15-Inch Shaft Tiller Handle Manual Start Manual Tilt Gray. The Yamaha F25SMHC Outboard Motor delivers reliable 25-horsepower performance in a compact and portable 4-stroke package. Built for simplicity and ease of use, this model features a 15-inch shaft, manual start, and manual tilt-making it a perfect choice for small fishing boats, inflatables, and utility skiffs where lightweight portability is essential.. Powered by Yamaha's smooth-running twin-cylinder engin