Fuel tank capacity - 1998 355

[Boathooked]

I am trying to get a definitive answer on fuel tank capacity for my 1998 Carver 355.

In my research I have come across the total gallons as 318 (though sometimes as 320) gallons. I do have the aft aux tank which I see references to being 120 gallons, and then the port/stbd tanks at 100 gallons (of course this equals 320 gallons, not 318) though sometimes the port/stbd tanks are listed at 99 gallons (which would give 318 gallons).

I do have the owners manual but it is not clear on exactly what is what, thus my question. Any help would be appreciated!

[Ramsport47]

I believe the official tank capacities are 100 for each side tank, and 118 for the aux tank. That's what we have found on a boat that we had to replace the tanks in.

[Boathooked]

Thanks Ramsport47.

[glazingguru]

I would be interested if you learn anything more on this.
The way I understood it when I bought my boat was that the two side tanks were each 125 gallons and the rear (aux) tank is 68 gallons. I believe this to be true, although I have never run the side tanks out and the aux tank has always been empty since before I bought it.

[MissWhit's]

If you really want to know the tank volume on any boat simply measure the tank width x height x depth to come up with total volume and divide by the volume one gallon of water takes up. I bet the volume of a gallon of water can be found on the internet.

[glazingguru]

yes, it's 231, although you have to account for rounded corners or odd shapes, that only works on square and rectangle shapes