Question about Echo Gas Blower 135 MPH390 CFM Blower PB250

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How to adjust carb on an echo pb250 - Echo Gas Blower 135 MPH390 CFM Blower PB250

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Posted on Jan 02, 2017

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2strokeJim
  • 577 Answers

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

Posted on Apr 05, 2011

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rycgl
  • 1545 Answers

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.

Posted on Jul 03, 2011

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1 Answer

Cleaning a Echo PB-250 blower carbureator


Just like every 2 stroke engine. Take carb off, take off both ends and clean. Count the H and L adjustment screws turns so they can be put back the same amount of turns. Take out and clean holes

Jul 09, 2014 | Echo Gas Blower 135 MPH390 CFM Blower...

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Echo PB250 blower carb problem


Wouls not run at high speed, kept bogging down. Bought the carb adjusting tool and set the high speed jet and ran as it was suppose to for a few days and started the same thing. Contacted Echo had they are having a lot of problems with the carb on these machines, they sent out an updated carb and it runs fine for now.

on Jan 31, 2011 | Garden

1 Answer

Echo pb250 blower how to adjust carb.


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.

Jan 07, 2014 | Echo Gas Blower 135 MPH390 CFM Blower...

1 Answer

Echo pb-251 won't run with out choke


I would say that Daren is on the best track here for repair. Myself i agree with the fact that your carb has some sort of blockage. Start with a good carb cleaning. Good Luck....

Nov 11, 2013 | Echo Gas Blower 135 MPH390 CFM Blower...

1 Answer

How do I clean a float needle seat on Echo blower?


pull carb off, dissemble it and replace needle and diaphram (carb kit) and clean it thourghly and then also make sure your tank vent is working properly cause if not it will drain your fuel tank also and fill your crankcase and cylinder with fuel !

May 17, 2012 | Echo Gas Blower 135 MPH390 CFM Blower...

2 Answers

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.

Jul 03, 2011 | Echo Gas Blower 135 MPH390 CFM Blower...

1 Answer

My Echo Blower Model 251 has given me problems ever since I bought it little over a year ago. It would not get full RPM's so returned it after reading the adjustments are set for 1100 ft. elevation and I...


there is one adjustment on the carb, but to get to it you need to drill or pick the black plastic cover out that is covering it, then you can adj the The blower at high speed and also check your exh screen to make sure thats not the prob before adj. carb. you will see jet just above top carb gasket at base of carb about ctr above wher it splits for diaphram good luck

Apr 12, 2011 | Echo Gas Blower 135 MPH390 CFM Blower...

1 Answer

BLOWER WILL START WITH FULL CHOKE, BUT SHUTS OFF WHEN TRYING TO REDUCE CHOKE.


I'm having the same problem. My suspicion is the carborator requires gas/air mixture adustments. This requires a special carb adjustment tool - called a Long Single D Tool. I will try to have my fixed very soon - 1 week...I'll try to keep you posted.

Feb 19, 2011 | Echo Gas Blower 135 MPH390 CFM Blower...

1 Answer

Only three months old and used twice now it won't start we chnaged the gas brand new with new mixture. It boggs and just dies. ECHO PB250


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.

Jan 30, 2011 | Echo Gas Blower 135 MPH390 CFM Blower...

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