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The fuel to oil ratio is 50 to 1
This equates to 1 pint two cycle outboard oil to 6 gallons of fuel
1 Qt to 12 gallons
1 Gallon to 48 gallons and so on
Not just any oil will do, be sure to use a good quality Two Cycle "Outboard" Engine Oil...
Jet ski oil will foul a outboard and the extra expense is unfounded....