Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer

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I have a 1 year old ryobi mult tool stimmer hedge cutter it has all ways been a problem to start i went to get it to start to day (i alwayes put new petrol/oil mix in it ) it started after about 30 pulls of the starter but it would not pick up revs unless i kept playing with the choke have you had a problem with these items or have i got one with a problem i am a retired motor mechanic so i am not stupid etc i sounds like it is drawing in air somewere?? i hope you can help please

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Hi Red,

I've got several Ryobi's. No start problems, mine are in the interchangable shafts.

I'm glad you have experience, it'll be a lot easier for both of us. The following questions/thoughts are in no particular order.

The drawing air you mentioned sounds like a factor. Can you tell where its coming from?

  • Is the primer bulb intact?
  • Flexible, no cracks
  • Does it function? When pressed and released (after 5 or so presses), does it fill with fuel or is there air in there?
  • Does in reinflate right away?
Pull the plug and eyeball it. You know what to look for. If anything looks suspect, replace it.

Try the starting ether test. Take off the air filter, give it a spritz of starting ether or carb cleaner. Then try to start it. If it starts right up, theres a fuel flow problem.

Are the carb assembly bolts tight? if you can see the gasket, inspect it for breaks. You may need to remove the carb to check the gasket.

Tip: I don't even mention this to most folks, but with your background, this trick could help locate the problem.

On some machines brought to me for repair for starting problems, I take off the pull start assembly. I use a screw gun with a socket bit on the shaft nut to spin/start the motor (Gives your arm a break). This would make it easier to find where the air is being drawn in, running or not.

You can prime it, adjust the mix, hand over the choke, all while the motor is spinning.

Comment back on your findings.

Best regards,
Mike

Posted on Sep 11, 2009

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2 stroke engines are a bit goofy. Ckeck your air filter, ck the spark plug and clean it. Look for 2 small sceews loacated close to the carb. One is for idle air mix, one is for full throttle mix. If you use the same mix of gas and additive each time you will have to adjust these screews once in  awhile. If you use a different mix/additive you will have to adjust them every time. Get a can of starting fluid to get it started easy, then adjust it a little at a time to keep it running, once it is hot make your finial adjustments. 

Posted on Sep 11, 2009

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