Recently purchased a used 2020 336 Canyon. The fresh water tank gauge always reads full. Gauge is getting power and does go to empty when the power is turned off. I am assuming I have a sending unit issue in the tank, either the unit is bad or stuck. Embarrassed to say we are struggling to find the fresh water tank and hot water heater. The owners manual states the fresh water tank is near the transom but we cant visually see a tank through the small access hatch? We do see the diesel fuel tank for the generator. Before we go through the process of removing the fish box to access the transom area I was hoping someone could shed some light or has a drawing of all the factory equipment locations in the hull of the boat. Thanks!!
Grady 336 Fresh Water Tank Sending Unit
- Thread starter JohnnyB123
- Start date
Just for kicks, I just looked in your manual and it actually states how to access both the tank and the heater. I don't have your boat so I can't comment on "how" accessible they are... but I work on a lot of boats and, generally speaking, access is largely determined by your size and how often you go to yoga class....... 
Dennis, thanks for the reply. I can’t find that anywhere in the manual? It just indicates fresh water tank is mounted towards the transom?
It was in the part that talked about the various components of the boat - there was a paragraph or two about it. Or, at least, the one that I looked at from GW's site had it. Maybe you have something different?
Yes I have the same Manual info. Water tank is accessed aft next to transom. Hoping maybe I was confused or maybe the manual is wrong. If that is the case then maybe you have to pull the entire fish box to access? Thanks!!