One of the first bits of advice I got when I bought a boat was to carry one of these, so I dutifully bought one and then spent a few years getting ready to cruise. Classic story. Now selling the boat, with medical issues. <sigh>

Anyway, from the manufacturer:

"The Mr. Funnel Fuel Filter is specially designed to filter out water, dirt, and debris from most fuels including, gasoline, diesel, heating oil, and kerosene. These harmful contaminants can lead your engine to a loss of efficiency, engine shutdown, or even system failure."

These are much loved for boats, trucks, and pretty much anything that slurps fuel from potentially dodgy sources. Good to have.

Does not include original factory packaging... price includes shipping.