mercury 6hp rerated to 9.9 or 15 hp

[Aardvark earthworks]

G'day all,
I heard the other day that it is possible to rerate a 6 hp mercury outboard to 9.9 or even 15 hp by changing the jetting.
Is this true?
Thanks

 

[Chinewalker]

Re: mercury 6hp rerated to 9.9 or 15 hp

No - completely different motors...