Where can I find total and usable fuel capacity?

[Rolo]

I just purchased a used 2016 Sundeck 220 OB. All literature I've seen says it has a 45 gal fuel capacity. The multifunction tach display shows that the fuel capacity is 53 gal. I can reset that capacity to 45 gal but want to make sure I'm using an accurate number. I don't mind having a safety margin built into it. I realize that there's a difference between the tank capacity and the system capacity...or usable vs unusable fuel.

Thanks!

 

[Stee6043]

I think the general rule is 80% is usable. I personally try to keep above 50% just as a habit. And I prefer having a smaller # during my (more frequent) fillups

I'd trust the literature from your boat before the electronics. Electronics can be changed. Confirm your tank size directly with Sea Ray and enjoy....

 

[Lazy Daze]

Other than the literature, the gas tank will have a spec plate on it. If you start looking at the tank, you'll find it. It may not be in the "easiest" place to see it - but you'll find it. The plate will show, among other things, the exact capacity.

 

[370Dancer]

If you are outside, usable capacity is 2/3 total capacity. If you are inside, near a fill up, you can be more adventurous.