Question about Echo Inc. 44 CC, Carb Certified Backpack Blower

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Echo PB413H running rough

I purchased this blower new from Home Depot in Nov 2008. I have only used this blower about 8 times and it has worked great until this last time. I only use the Echo brand oil and 93 octane fuel. The blower bogs down when I try to run at "full throtle". If I back off on the throttle, it runs ok but does not have the power it should. When I used it last week it worked fine. Anyone have a solution ?

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  • larry1p May 16, 2009

    Thanks for your prompt response. Turns out the Spark Arrestor Screen was slightly clogged. I was really surprised. I bought this blower new and it only has somewhere between 16 - 20 hours running time on it. I always use 93 octane fuel and the Echo brand oil. I guess this unit is going to require more preventive maintainence than I thought.

  • Doc Robertdoubleoseven Jan 19, 2013

    You should always, always use regular octane fuels, never plus or super, in your 2 cycle engine unless otherwise directed by manufacturer.

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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)

Posted on May 15, 2009

  • John C Bridgers Sr May 16, 2009

    Hello Again larry1p:



    You are Very Welcome.

    >>Till Next Time. May All Your Mechanical Problems be SMALL ONES and as Always, May the All Mighty Bless You and Yours. Be Safe and Happy.


    Best Wishes and Good Luck


    Respectfully


    jbridger (John)

  • Doc Robertdoubleoseven Jan 19, 2013

    Awesome sign off Bro. John

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