I have an old but lively 1986 15hp Suzuki DT15. The maximum hp/rpm for the stock engine is 15 at <br />5500 with a 9x11 prop. The displacement of this engine is fairly large for a 15 hp. I think its around 287 cc. I know that the older Johnsons and E-rudes 15s were only 216 cc. but made their...
