How Long Before Boat Fuel Goes Bad?
For a boat equipped with an internal combustion engine, fuel obviously starts to run out as you operate the boat. However, that same fuel can go bad if you let it sit in the tank long enough.
What Will Old Gas Do to an Engine During the Winter?
One issue with stored gasoline is that it’s often not just fuel. Water suspended in gasoline can separate out and freeze inside lines. If enough of it does, it’ll damage fuel system components.
Storing your boat in a warmer environment can help. One way to prevent condensation from happening is to fill the tank more than half-full during the winter, since this can help reduce the contraction of the fuel.
How Do You Know Boat Gasoline Has Gone Bad?
The smell is the first clue. Bad gasoline has a sour smell, and looks darker than fresh fuel. You’ll also notice it when you try to start and run the engine. It may be tough to start, and it’ll run rough when it does.
Bad fuel and fuel system problems are possible reasons an outboard motor is having idling problems or won't idle at all. Watch the video above to learn more about how bad fuel and other issues can cause outboard engine idling problems.