What kind of engine is it... outboard or inboard? Carbs or HPDI... Did they change fuel filters in the fall and treat the gas... did they/you run treated gas into the engine when you winterized... Load it up with Startron and change the fuel filters. If it is a HPDI Change the filter in the VST tank...
This is why I leave my tank near empty! the little water that will get in there will come out Thur the water separator, If the gas gets a little bad, I am filling up any way and the mix should be good to go.
Better then having 120 gals of bad gas to throw away!!
Hybrid Mode
