Sorry, it takes other stuff like port timming, exhaust settings, and maybe a few others to make a 15hp rather than a 9.9. Better off to just buy the 15 if that's what you want, it's cheeaper and a lot easier.<br /><br />Craig
This subject has been covered ad-nauseum just about every month. Try a search and you'll find plenty of information including plenty of reasons why it's a really bad idea. The gentleman that told you that all you need is a carb is woefully misinformed! I wouldn't let him work on my lawnmower!
There was a time, many many MANY moons ago, that intake chages on Mercury's were all it took to get some extra hp.<br /><br />Alas, Mercury smartened up, and it hasn't been that way for decades.<br /><br />Who ever gave you that advice prolly lost the acid wars of the late 60's. <br /><br />-W
Hi Willy..... Nice to see your doing ok.<br /><br />Bottom line.... Do a search with my number below and you will get all the info you need.... I asked the question and have found a certified merc mechanic that would do all the work to make it happen. ESTIMATED total cost of parts and labor is in $400 ballpark.<br />I don't know why the folks here just want to sell someone a new 15hp rather than giving folks the real deal.....<br /><br />And no I am not from Cambodia..... LOL
<br /><br />-W
