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Has Anyone Had Performance Issues On A 97+ Merc/ Mariner 2.5 Efi Motor?

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I have been having hole shot issues and top speed problems lately. I had my injectors cleaned and balanced by Brucato and it made a big difference, but it still isn't running like it used to.

Any help would be very appreciated. Thanks!

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Sounds good, thanks guys! I have a good feeling its the fuel pump now. I bought the boat from my father and he ran premium ethanol through it for a few years before I got it so I'm sure its fuel related. That ethanol is bad stuff...

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