Good lord. The low level IQ of the OP is shocking. Boats explode at fuel docks when morons don't follow procedures. Turn off all circuits, shut off batteries, close all vents windows and hatches, fill fuel. open all hatches and windows, wait, turn on batteries, only switch blowers on, wait 5 min, open engine compartment and smell for gas. THEN you can turn on other circuits and start engines. Bone-headed boaters are a thing, just like this post's creator.