Evinrude/Johnson 9.9hp to 18hp tune up

yama

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27 Aug 2016
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Hi
I have read that the Evinrude/Johnson 9.9hp outboard engine can be converted to a 15hp by removing the jets in the carburetor and replacing them with larger jets.

Does anybody know whether the same can be done to a Evinrude/Johnson 15hp by replacing the jets so that it becomes a 18hp or 20hp
Thanks
Ed
 
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