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Message: <blockquote data-quote="MuskieGuy" data-source="post: 458612" data-attributes="member: 24132">Maybe he meant a newer vs older?  Tohatsu uses the 9.8 nomenclature to differentiate their motors from the 9.9's they make for everyone else.  It's otherwise the same motor.  Also, the 9.8's are on the same block as Tohatsu's smaller hp motors.  The 9.9 efi is completely a different animal.  It's got a larger displacement, which should mean a better whole shot and better performance all in all.  It's a dumbed down version of the 20 and 15 efi.  So hoping for a few gains, but maybe not in top speed.  For sure there will be some positives vs my old 2 stroke 9.9.....no carb, no mixing gas, quiet, etc.</blockquote>