#1 is to use only non-ethanol gas if possible. #2 is invest in a good water separating filter & keep it serviced. #3 is use of a good fuel additive. I've been using Startron Enzyme ever since it came on the market. It is affordable and you can't easily "overdose" your fuel. It also keeps valves functioning correctly by cleaning varnish & carbon. I have a 11 gallon built-in tank in my crappie boat and just keep adding gas to my tank when it gets below half full.

