If you use your boat alot, you’re good to go. IF you don’t use it often, make Dang sure you park the boat with a slap full tank of gas. 2 years in a row, I didn’t. Tank drain, Carb rebuild 2 years in a row teaches you a lesson. Out if 15 gallons in my tank last year, 8 was water. Used real gas this year, had bout 3/4 tank and no water in my fuel/water seperator when I ran in the other day for 30 minutes in the yard. Small engines heck no. Nothing but real gas in them