honda99Yes. Honda's BF8 and BF9.9 use the same 222 cc block, the 9.9 is rated for 5500 rpm while the 8 is capped at 5000. Similarly, the BF15 and BF20 use the same 350 cc block;s 9.9-horsepower four-strokes pack just the rht amount of punch. An 8-horsepower four-stroke (Practical Sailor Jan. 15, 2004) may still struggle with a fully loaded