Not trying to be a smartass but I think you mean 7.5??
I use to run a 9.9 on a 13.6 gregor and would take it almost anywhere including 3miles offshore and anywhere the prop wouldn't hit
you should be fine just look out for submerged logs and where a PFD plus don't overload the boat with 2 buddies and 3 dogs like I did LOL
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