For a 5 HP Montgomery Ward Sea King outboard motor, you should use a 50:1 mixture of fuel and oil. Typically, this means mixing 2.6 ounces of 2-stroke engine oil with one gallon of unleaded gasoline. It's essential to use high-quality 2-stroke oil that meets the manufacturer's specifications to ensure optimal performance and engine longevity. Always refer to the owner's manual for specific recommendations regarding oil type and mixture ratiOS.
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