I have a Honda four stroke 9.9, that I bought brand new 3 years ago. Very sweet little motor. My only regret is that I didn't get the 15 hp and here's why..... The 15 hp is the exact same size, and weight as the 9.9. The only difference is carburation. Since these things get ourageously great fuel economy anyway, this is not an issue. My 9.9 pushes me and my gear, in my little 12 foot v-hull, along just fine.... probabably close to 20 mph I guess, but add another big guy in the front of my boat and it drops to about 10 or 12 mph ! I don't think a 15 hp would give me much more top end speed, but I think it would be better for when I have a passenger (heavier loads)...... Then again, I prefer to do all of my serious trophy hunting by myself anyway.

Peace,
Fish

PS, Normally the 15 hp is about $250 more than the 9.9.... well worth it. But I got my 9.9 for about $300 less than the going rate at the time..... so a $550 difference would have been hard to swallow..... looking back on that now though, I still maybe should have.... hmmmm.