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Echo blower motor will not rev.full throttle--only about half

Have checked the muffler,cleaned the air filter

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  • hammondt15 Dec 27, 2008

    I have the same problem. I have a Echo PB-261L. Has blue spark, Gets gas, New carburator, New fuel filter and hoses in tank. When all new parts were put on, ran great at full throttle. Now will not run full throttle most of the time. Acts like it is starving for gas but has a solid primer of fuel. No leaks at carburator or hoses. Choke it to get it going. When hot, harder to start. Still has blue spark. Boggs down just like it starving for fuel. Pulled muffler and cleaner port from carbin. Blows excellant air when running.

  • josh1111 May 11, 2010

    can you adjust the carb screws, if so how many screw are on the carb?

  • John McKinney May 11, 2010

    just a suggestion to you guys. i know it's a long-shot, but have you tried checking your throttle cable? this could be broken and/or stuck. let me know if this helps at all. thanks.

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  • 87 Answers

Check the insulator block and associated gaskets behind the carb. Sometimes the insulator block crack and reduce the amount of vacuum to the pulse diaphragm.

Posted on Apr 10, 2009

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3 Answers

Blower bogs down and kills at full throttle


Check the following, then clean or replace:
  • Fuel Filter - Located IN the fuel tank
  • Spark Plug
  • Spark Arrestor - at muffler port, creates resistance of exhaust flow, engine then bogs
  • Carburetor - may need a rebuild kit
Then watch this...

and...

Mar 31, 2013 | Echo Pb265l 25.4cc Gas Powered 158 Mph Low...

1 Answer

Blower not running at high rpm when full throttle. Cleaned air filter, gas vent, gas filter and spark plug. Blower is 3 years old. Have not bought any new replacement parts.


Try removing the muffler and look inside of the exaust port, you should be able to see the piston in the full opening of the port. If you can, try starting and running at wide open throttle. If it runs fine( a bit loud, so wear hering protection), then you have a plugged or partialy blocked muffler or spark arestor. Sometimes rich mixture can cause excessive carbon build up.

Hope this was helpfull.

Nov 07, 2010 | RTO Echo 25.4 Cc Backpack Leaf Blower -...

1 Answer

I have a Echo PB-260L Blower. It starts fine then gradually loses power sometimes completely shutting off. I have replaced the fuel filter spark plug air filter and have cleaned the screen.


Check the exhaust port upstream from the muffler and make sure it is not restricted with carbon. Mine was less than half way covered over with carbon. Scraped out carbon, checked muffler and screen(ok), back-blow the fuel line harness including the fuel filter and fuel tank vent and took carb apart and blew out all passages, not replacing anything and now runs fine. Would not rev past high idle before. Be sure gas is FRESH and mixed at 40-50 to 1. Hope this helps.

Jul 14, 2010 | RTO Echo 25.4 Cc Backpack Leaf Blower -...

1 Answer

Same problem here also..


The carb may need to be adjusted or taken apart and cleaned. Also check the throttle cable to make sure it hasn't been streched out.

Jun 22, 2009 | ECHO, Inc. PB-251C Handheld Blower

2 Answers

Can't get my Echo PB251 Blower to rev up at all, unit is 8 mo.s old was running fine now all of a sudden won't rev up, I have changed plug gas filter,cleaned all filters including spark arrestor changed...


guarantee exhaust is clogged maybe not muffler but exhaust port pull muffler off check screen and muffler then look into exhaust port usually rectangular port is closed down with carbon pull starter slowly to lower piston then scrape out carbon with screwdriver clean as good as possible then blow cylinder out make sure to get all pieces of carbon out reassemble should run fine

Jun 14, 2009 | ECHO, Inc. PB-251C Handheld Blower

2 Answers

Can't get my echo to rev up


Your carburetor needs cleaned, or you need a new carb. kit. If you need tips on how best to do this, let me know.

Jim

Jun 03, 2009 | ECHO, Inc. PB-251C Handheld Blower

1 Answer

Echo PB413H running rough


Hello:

From your Description it Sounds like the Exhaust is Restricted or the "H" Mixture Screw Resuires Adjusting.
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
>>The Following is the Instruction File for Setting the Air Mixture Screws. Any Input is Appreciated. The Procedure is the Same for 1 or 2 Mixture Screws, Just Use the Instruction File and Skip Over the Section with the Missing Mixture Screw ( Usually the H Mixture Screw).
>>Now Setting the Air Mixture Screws:
>>****Turn the Idle Air (L) and Main Air (H) Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Set the Throttle Full Open, Start the Engine.
>>Turn the Main Air (H) Mixture Screw Clockwise Until Proper Revs are Obtained. **Carefully Use your Finger and Move the Governor Arm to Rev the Engine (on Chainsaws and Trimmers Use the Trigger to Rev the Engine) Until you Reach Max RPMs (on Chainsaws and Trimmers, the RPMs are Not Set to MAX. Set to Max and then Reverse the Setting Screw 1/4 or 1/2 Turn. If the H Mixture Screw is Set too High; the Engine will be Starved for the Oil in the Gas and Damage the Piston and Jug/Cylinder) and the Engine is Running Proper at Full Throttle Up a Grade and for Chainsaws and Trimmers they Do Not Bog DOwn Under a Load. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs.**
>>Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required.
>>Now Set the Idle Air (L) Mixture Screw so there is No Hesitation when Rapidly Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 15, 2009 | Echo Inc. 44 CC, Carb Certified Backpack...

1 Answer

Motor not accelerate past idle, bogs down...


yes,check your spark arrestor screen in the muffler

Apr 22, 2009 | ECHO, Inc. Shred n Vac

1 Answer

Echo Blower dies out when full throttle


Find the fuel air mixture screw located by the carb and turn it so the moter starts to slow down then turn it so the blower runs smoothly this should keep it from dying out

Nov 22, 2008 | Echo Garden

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