Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer

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Ryobi gas trimmer

I prime my ryobi gas trimmer. It starts for about 5 seconds. I prime it again and it does the same thing. It never runs more than 5 seconds.

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  • Anonymous Oct 05, 2008

    i also have a 725r trimmer. i checked the plug; wet but clean. dried it, cleaned it and re-installed it. oil/fuel is mixed correctly, air filter also clean. i replaced the 2 fuel lines also. however, this trimmer has sat for 2 years. it fires and runs for about 2-5 seconds, then just stalls. it will immediatley restart, so i doubt its an empty fuel bowl. any ideas?

  • b3rcv Oct 25, 2008

    I too have the problem of the engine starting and then stalling out. My gas is fresh, the oil/gas mixture is correct, I replaced all of the fuel lines. My only concern is that I may have possibly crossed the fuel lines but I can't find any schematic (it's not in the owenrs manual) to show which line goes where so I can verify if I reinstalled them correctly. My last step will be to replace the spark plug if the fule lines are installed correctly.

  • Anonymous Oct 26, 2008

    I have the same problem. I brought it back to Home Depot after having it for 10 months (used it maybe 5 times) and they sent it off for two weeks to be repaired. (Replaced an ignition module) Two months later (Out of warranty) I had to argue for 30 minutes before they finally agreed to just give me a new one if I would just go away. Well it worked one time and now it is exhibiting the same problems. I don't buy the gas suggestion since I use fresh gas with no ethanol. This trimmer is a piece of ****. And now I have no recourse because my receipt is dated May of 2007.


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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!!


Posted on Oct 08, 2008

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Its either spark or fuel...........try new plug, have proper fuel and oil in it? try contaminant cleaner in the fuel also ??? carburator

Posted on Aug 31, 2012

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I have the same problem. I have the ryobi expand it string trimmer. I had the previous version of this same trimmer that ran perfectly for 14 years -- never had to send it off for service. However, one of the fuel lines finally broke. I was going to send it off for repair but found out that the repair costs were about the same as buying a new ryobi trimmer. So, I opted for the new trimmer. After three months of torture (kept stalling), it started leaking gasoline and I took it back to Home Depot. The replaced it with a new ryobi trimmer. I just took it out of the box today, and bought new gasoline and of course mixed it with the 2-cycle oil (ryobi brand).Argh... It is dying constantly and won't run more than a minute or two at the most. I'm worn out from trying to start the stupid thing. I'm very disappointed. And, of course, I already tossed out my old ryobi that I could have repair with less misery. Another disappointing thing about the new ryobi is all the plastic. It doesn't seem to be as well made or durable as the previous generation. I'm off to Home Depot.

Posted on Nov 23, 2009

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