Hi Ray & welcome to the forum & Mainship Pilot II ownership. I.,ve had mine almost a year and I learn something new every time I take her out. On mine the freswater tank guage is on the left side of passageway door frame just below the salon light switches. But warning - the freshwater pump breaker must be closed (on) for the indicator to work. The poop tank guage is in the head. Mine is not working (very common) Rgano just replaced his sensor and got it working - I think he had to cut an access hole to get at it. Happy to share info - just ask. Larry