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Anonymous Posted on Jan 07, 2014

Echo pb250 blower how to adjust carb. - Echo Gas Blower 135 MPH390 CFM Blower PB250

1 Answer

Wade Mobley

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  • Master 513 Answers
  • Posted on Apr 23, 2014
Wade Mobley
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The new carburators do have adjustments but consumer is not allowed to adjust do to epa regulations find an echo dealer or echo repair tech with tools to do job everyones answer is carb clean carb clean damages diaphrams and seals in carb never use carb clean on lawn and garden equipment.

5 Related Answers

rycgl

Roy Cagle

  • 1545 Answers
  • Posted on Jul 03, 2011

SOURCE: ECHO PB-250 blower new used one time carb.needs

Your machine has a rotary-valve diaphragm type carburetor. These carburetors typically only have an adjustment for the IDLE speed with an available option to control the main jet with an adjustable mixture needle.

http://www.echo-usa.com/Products/Blowers/PB-250

Here is the info on the Zama rotary-valve diaphragm carburetor.

http://www.zamacarb.com/prodlist.html#RB

Some have a small adjustment needle in the center pivot of the rotory part, under a brass plug...but most have nothing. Many end users and techs are complaining about the non-adjustable carbs. They are made this way to meet the more stringent EPA emissions codes that are getting tougher each year.

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Anonymous

  • 1 Answer
  • Posted on May 25, 2009

SOURCE: low rpm's from Echo PB-251 leaf blower

Too much oil in gas.

rycgl

Roy Cagle

  • 1545 Answers
  • Posted on Jan 30, 2011

SOURCE: Only three months old and

My research shows that a consumer gets a 5 year warranty and a commercial user gets a 2 year warranty on any Echo equipment they buy. Could you consider getting some warranty service on this unit since it is still under coverage? It sounds like a fuel delivery problem (carburetor adjustment maybe), but I also realize that some of the newer "rotary" type carburetors in use don't have the Low and High speed mixture adjusting screws like the old-style diaphragm carburetors that preceded them.

2strokeJim

2strokeJim

  • 577 Answers
  • Posted on Apr 05, 2011

SOURCE: I have a new echo

sounds like a dirty carb, dissamble it and rinse good with carb clean, be careful when taking the top off it that you get it back together the same spray the white center good and all little holes good. then reassemble, also try to loosen your gas cap maybe first before cleaning carb, you might have a plugged vent in the line coming out of the tank. Good Luck

Anonymous

  • 7 Answers
  • Posted on Aug 15, 2011

SOURCE: Blower starts and runs for

I don't think the oil-gas ratio will cause that problem. Did you check to see if the fuel lines or fuel filter is clogged?

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ECHO PB-250 blower new used one time carb.needs adj.can this carb.be adjusted

Your machine has a rotary-valve diaphragm type carburetor. These carburetors typically only have an adjustment for the IDLE speed with an available option to control the main jet with an adjustable mixture needle.

http://www.echo-usa.com/Products/Blowers/PB-250

Here is the info on the Zama rotary-valve diaphragm carburetor.

http://www.zamacarb.com/prodlist.html#RB

Some have a small adjustment needle in the center pivot of the rotory part, under a brass plug...but most have nothing. Many end users and techs are complaining about the non-adjustable carbs. They are made this way to meet the more stringent EPA emissions codes that are getting tougher each year.
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My research shows that a consumer gets a 5 year warranty and a commercial user gets a 2 year warranty on any Echo equipment they buy. Could you consider getting some warranty service on this unit since it is still under coverage? It sounds like a fuel delivery problem (carburetor adjustment maybe), but I also realize that some of the newer "rotary" type carburetors in use don't have the Low and High speed mixture adjusting screws like the old-style diaphragm carburetors that preceded them.
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