The specifications for my SV200 show a 20 gallon fuel tank. I tried grooming a snowmobile trail today for the first time and kept an eye on my fuel level. I didn't finish the grooming because I ran pretty low on fuel. My original tank was too far gone to restore, so I replaced it with a 13 gallon marine type tank. Any suggestions on more capacity? Another tank like the one I have? I've attached a picture of my current tank.