What is the gas ratio for a mercury 7.5 hp boat engine?
50:1 i belive
The 1996 75hp Mercury outboard motor can be tricky to care for in terms of fuel mixing according to some users. The recommended mixture has seemed too weak for many owners, and currently the recommended ratio stands at roughly three ounces of oil to each gallon of gas. As with all small engine calibration, it is best to adjust according to need.