I'm not sure but might be 40 to one?
40:1 owner's manual for a homelite st 185 trimmer says 32:1
50:1 gas to 2 cycle oil.
fuel ratio for try26pg grass trimmer
50:1
50:1
50:1
50:1 with the proper oil
The Homelite trimmer UT20930 requires a fuel mixture of 50:1, which means you should mix 2.6 ounces of 2-cycle oil with one gallon of unleaded gasoline. Always use fresh, high-quality gasoline and ensure the oil is specifically formulated for 2-cycle engines. Mixing the fuel properly is essential for optimal engine performance and longevity.
40 to 1
50:1
40:1
32:1 (4 oz. oil to 1 gallon of gas)