How to Check for Water in Boat Fuel | Boats.net
Uncontaminated: Fuel will be amber in color. Water in the fuel: The water will form a clear bubble or layer at the bottom of the jar because it’s denser than gasoline. Phase separation: Fuel will have an opaque gelatinous layer at the bottom of the jar. NOTE: Photo is meant to illustrate what bubbly or gelatinous oil in water may look like. Don’t pour the fuel into water when doing the test.
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