Trimmer Not Reaching Full Throttle

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  #1  
Old 09-14-13, 08:01 AM
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Trimmer Not Reaching Full Throttle

A friend gave me his well used, poorly maintained Ryobi trimmer. Its the one that you can swap out multiple attachments with one power head. Starts up fine, but it will not reach full throttle, hovers ever so slightly just below max. If I remove the muffler, it reaches full throttle immediately. So, getting a little back pressure from the muffler which is caked full of carbon. How do I remove the carbon deposits to try to achieve full power. Carb. cleaner didn't touch it. Looks like the throttle body is set to full open.
 
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  #2  
Old 09-14-13, 08:58 AM
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Use a propane torch and burn it out. Have a good one. Geo
 
  #3  
Old 09-14-13, 10:56 AM
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It probably has a clogged spark arrestor in the muffler. Do this:

How to Clean a Spark Arrestor Screen on a Small 2-Cycle Engine--A Quick Fix - YouTube
 
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Old 09-14-13, 11:50 AM
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Thanks for the replies, I had already looked for a spark arrestor and did not find one. Would MAP gas be too hot for the cleaning attempt to burn off the carbon?
 
  #5  
Old 09-14-13, 06:11 PM
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It's tough to say. I was told not to go hotter then propane so I have never tried it. If you have a propane barbecue with a side burner, just set them on the side burner part or the regular barbecue elements if you don't have a side burner. That should burn it off.
 
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