Water In Gas Tank

Water tends to puddle and it and ice eventually end up in whatever low spots they can reach. It may be the bottom of the tank, a fuel line or filter, or carb bottom. Water which accumulates and freezes will eventually lead to fuel starvation. Isopropyl is one good way to remove it as it allows water, small quantities of it anyway, to move through the system without becoming ice. You can also use a drop-in-tank fuel absorber.

Water in fuel is an enemy and needs to be kept out. The best way is to avoid fuel from containers which might collect and contain water already. (I know this is almost impossible in some places.) Moisture collection in tanks can be largely prevented by keeping the machine's tank full, especially when the machine is stored in cold temps. Liquid cooled machines which have heat exchangers under the tank will warm the fuel and sometimes allow the ice to melt to water. This can created problems when the machine is shut off and the water freezes where it is - often in the lines. The liquid water which allowed fuel to pass when things were warm can completely block passage after is freezes and make restarting the machine a very problematic puzzle. Sometimes even refueling with cold fuel will freeze that water. The best way I have found to prevent icing in the fuel is to add isopropyl gasoline deicer every time I refuel. All it takes is a few ounces, perhaps three or four. Done regularly and by making your best effort to keep the fuel clean, you wil araely have ice problems.