I've been fighting with an Echo PB-251 blower and an Echo SRM-225 string trimmer since near the end of last lawn season (this is the forth season I've had them). Along comes a thread on a firearms forum and lo and behold the answer to the problem is spelled out in terms even I can understand.
After reading that thread (which attributes the problem of the engine bogging down when throttle is activated to collapsing fuel lines) I was going to just replace the fuel lines, but I discovered that there are kits that include new fuel lines, rubber grommets, filters, clips and cap seals for about $13.00 each. Hell, the kit for the SRM-225 even provided a new primer bulb. Ten minutes after the UPS truck delivered them to my door I had both machines running like new again. If you've tried other things and it still hasn't worked I highly suggest you try this.
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Well... it looks like the prices have gone up some... still well worth it though.
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There is two things you need to check. The first is the air filter. And the other is check the mufler to check it it is clogged.
I had same problem with my blower that was several years old and had always run great. Air filter was clean so I changed spark plug and it ran like new again for $2.50:-)
I've been fighting with an Echo PB-251 blower and an Echo SRM-225 string trimmer since near the end of last lawn season (this is the forth season I've had them). Along comes a thread on ehynol on a forum and lo and behold the answer to the problem is spelled out in terms even I can understand. It turns out the the fuel hoses become soft and colaspe. There are kits that include new fuel lines as well as rubber grommets, filters, clips and cap seals for about $13.00 each. Hell, the kit for the SRM-225 even provided a new primer bulb. Ten minutes after the UPS truck delivered them to my door I had both machines running like new again. Hope thos helps someone.
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