Question about Echo Gas Blower 135 MPH390 CFM Blower PB250

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I have a 6 month old Echo PB-250 blower that will no longer take full throttle? It just kind of stumbles at one third throttle on as if the choke was on (not the case). Also have broke the pulll start cord a couple of times now, is there a better cord to use? Good blower, but if you have to put up with problems, why buy it in the first place? Jim Converse

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Jim, pull the muffler off and check for a blocked spark arrestor screen, or a partialy blocked exaust port. The screen is designed to catch carbon embers and gets plugged up. You can remove it, but cleaning it is a better choice. You can use solvent and scrub, or you can use a propane or mapp torch and incinerate the carbon, or you can just repalce it. On the exaust port look in after you take the muffler off and make sure it is open. You should be able to see the piston go up and down. The port is shaped as a rectangle. You will need to us a scraper ( a small screwdricer is fine), be sure to put the piston up, this will keep the carbon you scrap off from entering the cylinder. Be carfull not to scratch the piston whil cleaning. Then use carb cleaned to was the debris out BERFOE you move the piston to check your cleaining job.

The starter rope should be made of a braided nylon and not the cotton (cloths line) type. It will usually have a red or blue woven in it. A number 4 rope will work fine for your blower.

Hope this helps.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/matt_8dbc24bf722649ac

Posted on Nov 04, 2010

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1 Answer

Have a PB-250, ran great but now only runs full throttle, does not idle low.


You've been running the unit with the wrong oil to gas ratio and now the unit runs rich - there is no real way to fix it at this point - you can adjust the carb but it will not probably hold the idle you desire - but then again blowers are to be ran wide open 85% of the time so don't sweat it too much on this unit but practice better maintenance and a proper mix ratio in the future.

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Most likely there's a problem with fuel supply - choking cuts air supply optimizing the air/fuel mix. Most common solution is to check and clean the carburetor.

If there's a tiny fuel filter in the fuel line between tank and carburetor check it on excessive pollution. Replace it when necessary.

When opening the blower for carburetor cleaning - also check the airfilter and replace when dirty.

If never opened the blower - take pictures with a digital camera at each step. The pictures can help with assembly after cleaning.

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I have an echo pb-250 blower. This is the second blower ive had issues with. I have had it for maybe three months and this is the second time that ive experienced this problem. I can easily start it but...


what you need to do is remove the white plastic plug just above the diaphram gskt in the base of the carb use a pick or drill bit (but only turn it by hand) till you get it out then you will see a screw which will take a small flat blade screwdriver, start and warm up the blower then turn that screw counterclockwise till your Blower runs right on full throttle. the new equipment made now a days is set so lean for emissions that one change in the weather will affect how they run..... 2StrokeJim

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Did you implement, the choke during operation, or did you how about troubleshooting your gas mixture? what kind of oil did you use, is the spark plug sparking?

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I have a Echo PB/251 Gas Blower which I recently starting having problems keeping it to run. I have to keep the choke on to let it stay at a fast idle. I have taken the carb apert along with all gas and...


Check the muffler and/or spark arrestor screen in the muffler outlet pipe and also the engine's exhaust port behind the muffler. These are prone to carbon-clogging and the engine cannot "BREATHE" enough to reach full throttle. If all-clear in the muffler, go back in the carb and locate the inlet screen directly opposite of the inlet needle. Carefully pull it out with a pick and hold it up to a light source. If you cannot see thru it, replace it. This is another, (less) common area of obstruction.

Hope this helps,
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