What is the proper fuel oil mixture for mariner 15 hp outboard?

The proper fuel oil mixture for a Mariner 15 hp outboard motor typically requires a 50:1 ratio of gasoline to two-stroke oil. This means for every 50 parts of gasoline, you should add 1 part of two-stroke oil. Always use high-quality oil designed for marine two-stroke engines and ensure the gasoline is fresh and suitable for marine use. Always refer to the owner's manual for specific guidelines related to your model.