My boat has been out of the water for two years and the previous owner only had a quarter tank of diesel fuel in the tank. When I opened the tank through the fuel gauge and took out a sample of the fuel it was a dark amber in color. I expect the fuel needs to be removed and the tank cleaned. When I took the owners course through Mack Boring for the Yanmar engine the instructor said that the contaminated fuel could used in your home furnace without a problem. Once I remove the fuel do I need to clean the tank and if so how? Thanks for your help.
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Clean Fuel
Amber color is not necessarily deadly! You can have a service "polish" your fuel which will filter out sediment from the bottom of the tank, but I found that by using a manual pump with a hose that lays flat on the bottom of the tank, I can remove most old fuel, and simply replace it with new fuel each season. Be sure to use an additive to prevent further fungal growth.
Amber color is not necessarily deadly! You can have a service "polish" your fuel which will filter out sediment from the bottom of the tank, but I found that by using a manual pump with a hose that lays flat on the bottom of the tank, I can remove most old fuel, and simply replace it with new fuel each season. Be sure to use an additive to prevent further fungal growth.
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