I have a 1998 FS 175. Mine had the fuel restriction alarm on when I bought the boat. Went through the lines and there was a kink in the line. Fixed the kink and no more alarm.
Make sure you don't have a kink in the line past the filter.
I also pulled my entire fuel tank out and you would not believe the crud inside that thing. I would recommend to anyone with an older boat if you haven't done it in a while. TFF Post