The quality of the fuel is very important for satisfactory engine performance and long engine life. Fuel should be clean and free of contamination. Your fuel tanks should be kept full of fuel whenever possible. This will reduce the amount of water condensation and reduce the possibility of contamination.
Caution: Use of improper gasoline can damage your engine seriously. The use of any good-grade unleaded regular or premium gasoline with a minimum posted octane rating or Anti-Knock Index (A.K.I.) of 87 is satisfactory for use in gasoline marine engines. In areas where unleaded regular or premium gasoline is not available, use a good-grade leaded regular with a minimum posted octane rating.
A.K.I. of 89 may be used. However, gasoline containing alcohol, either methyl alcohol (methanol) or ethyl alcohol (ethanol) may cause increased:
• Corrosion of metal parts
• Deterioration of rubber and plastic parts
• Fuel permeation through flexible fuel lines
• Wear and damage of internal engine parts
• Starting and operating difficulties
Some of these adverse effects are due to the tendency of gasoline containing alcohol to absorb moisture from the air, resulting in a phase of water alcohol separating from the gasoline in the fuel tank. The adverse effects of alcohol are more severe with methyl alcohol (methanol) and are worse with increasing alcohol content.
Always follow the fueling precautions and safeguards found in your owner's manual!
Back to Maintenance Tips Selections