Yamaha Outboard FAQs

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Yamaha Outboard FAQs

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Question

Wouldn’t the cleaning properties of ethanol be good for a fuel system?

Answer

No, fuel systems that have been used for non-oxygenated gasoline will have varnish depos¬its and surface corrosion (rust and aluminum oxides). This includes the tanks and pipes used for fuel storage and transportation. Ethanol will clean varnish as well as surface corrosion from any surface it contacts. Ethanol may dissolve plastic resins used to make some fiberglass tanks. The amount of material cleaned from all of these systems can quickly exceed the filtration capacity of fuel system filters resulting in restricted fuel flow. Ultimately engine perfor¬mance is reduced and potentially damage to the engine can occur.

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