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  #1  
Old 04-10-2014, 05:57 PM
LLCllc LLCllc is offline
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Join Date: Feb 2012
Location: Louisiana
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Echo PAS-266 revving up

I have an echo pas-266 (s/n t44312001696) that has an rpm issue. After about 5 min. of use, its revs up real high. Sounds like it an r/c engine that is lean. I can let off the throttle and it will return to normal, but will rev back up within 30 sec of getting back on the throttle.
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  #2  
Old 04-10-2014, 06:00 PM
LLCllc LLCllc is offline
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Oh yea, it happens with the straight shaft edger attachment or the articulating hedge trimmer attachment.
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  #3  
Old 04-10-2014, 08:17 PM
spydahead spydahead is offline
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Sounds like you have a air leak, make sure everything is tight carb,manifold,ect, then start looking for split hoses, be careful because
what ever it is, its causing a very lean condition and if you keep runn'in
it, its go'na melt that piston eventually.
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  #4  
Old 04-10-2014, 11:49 PM
herler herler is online now
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Probably either a crack in a fuel line or possibly the primer bulb, also could be the carburetor-to-intake gasket or... Something as dumb and simple as the nuts that hold the carburetor could need tightening up a bit. Not sure if a loose spark plug could cause this, but all this and more is certainly worth checking into as I agree with the air leak analysis.
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  #5  
Old 04-11-2014, 10:21 AM
LLCllc LLCllc is offline
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Thanks for the quick replies. I will check all of that this weekend.

I did remember something else that is probably significant; The primer bulb is slow to refill/return to normal shape after pressing it. Is this a problem with one of the diaphragm valves not operating properly?
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  #6  
Old 04-11-2014, 01:35 PM
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ed2hess ed2hess is online now
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How old is this unit?
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  #7  
Old 04-11-2014, 04:39 PM
LLCllc LLCllc is offline
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About 2yrs old
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  #8  
Old 04-12-2014, 12:29 AM
herler herler is online now
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Well, if all else fails one could always replace the carburetor but I order primer bulbs by the 12-pack as I replace them frequently.

Not saying that's going to solve the problem, but fuel lines and primer bulb are first for me.
Especially surging...
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