Suzuki’s all new fuel efficient 20hp outboard motor model: DF20AS2 four-stroke outboard with the manual rope start and 15 inch shaft is an affordable choice of power for medium to larger sized jon boats, skiffs, and inflatable boats.. As the lightest outboard in its class and one of the quietest 4-strokes ever built, the Suzuki 20hp outboard motor is a great example of Suzuki’s excellence in engineering. Check out the long list of standard features below which make the 20hp Suzuki outboard engine an exceptional value.