Ryobi string trimmer 32.1 what do mix gas and oil or just gas?

Are you sure about the model number? I see several 30CC engine string trimmers by Ryobi. Two are the Ryobi RY30040B (SS30) and a RY30544 (SS30).

For both of these models, mix a high quality 2-cycle engine oil at 2.6 oz. per gallon of gasoline to pour into the gas tank. This ratio is used in several other Ryobi string trimmer models. Many Ryobi product manuals are available here: https://www.ryobitools.com/power-tools/support/manuals . Most Ryobi gas powered and 40V battery-powered tools will have a model number that starts with RY. The 18 V battery powered models often start with a P.

I hope this helps. If you add a comment with the actual model number, I may be able to provide more information.

Cindy Wells

The ratio is 40:1 Just add 3.2 ounces of 2 cycle oil to one gallon of fuel. Be sure to cap off the tank and shake to distribute the oil throughout the fuel before adding to weed eater.

Don't know that exact trimmer, but I always run 40:1 in all my trimmers, chainsaws, etc. That is 3.2 oz. of 2 cycle oil to one gallon of gasoline. I rebuild these machines daily and run that mix in everyting, except when it's actually specified on the machine.

spec is 32:1. gas to oil mix.

32:1 should be good. most ryobi's call for 32:1

you shouldn't need to mix oil with gas on a four cycle engine. this is for two strokes.

You only need to mix oil with gas when it is a 2 cycle engine. 4 cycle engines run on straight gas. Since you didn't post your model number, here is a site you can hopefully find your owners manual at. Hope this helps.
http://odref.com/pdf/Ryobi/

Unless it has a tag or decal on it saying it is a 4 cycle then it uses mixed gas/oil at about a 50:1 ratio. Straight gasoline will freeze the piston in the cylinder in mere minutes.

50:1

I don't mean to over simplify this, but are you using fresh gas? Gas string trimmers are extremely ticky when it comes to gas. They like it SUPER fresh. And while the gas and oil mixture should be right, it can be off a little bit and still run. Try draining all of the gas out, and then filling up with fresh mix. This is ALWAYS my first step with string trimmers, and it fixes the problem 75% of the time.
Hope this helps!!

chad