ll idles and runs smoothly at lower speeds. it is about 1 and a half years old

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If your gas oil mixture is right then try buying different gas the ethanol in gas is ruining all small gas motors!

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The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving old fuel in the leaf blower. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog the fuel filter and cause the engine to stall.
Before you install the new spark plug confirm that the spark gap is at manufacturer`s specifications. This engine model requires a 25 thousandths of an inch gap.
This is caused by a rich/lean cycle at idle. As the motor leans out the RPM`s increase and richen up the motor, when the motor richens the RPM`s decrease and the motor leans out again. This continual cycle is known as “blower surge”. With proper tuning, some of this surging should be able to be eliminated.
The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving old fuel in the leaf blower. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog the fuel filter and cause the engine to stall.
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
Correct Gap

The gap between the spark plug`s center electrode and outer electrode should be set at 0.02 inch, or 0.5 millimeter, for most Husqvarna trimmer models. On some newer models, the company recommends a slightly larger gap of 0.024 inch, or 0.6 millimeter.

If your leaf blower does not blow air, it is possible that debris has been sucked into the blower housing, impeding the impeller from doing its job. If the impeller is loose or the blades of the impeller are damaged or broken off, it can also cause the blower to become unable to blow air.
A clogged air filter may cause your blower to idle roughly as well. Air filters can be cleaned to ensure they run properly, and should be inspected as part of your normal blower maintenance routine. If the air filter in your leaf blower is partially plugged, it can cause your engine to run, but die at full throttle.
A common problem that could be keeping your leaf blower from starting is a blocked air filter. Clogged air filters cause the blower`s engine to receive too much fuel and not enough air, which often leads to a faulty start (or no start at all).

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Seems to start easily run for a few minutes and then slow and stop–bulb remains full –gas is good–have tried half choke in case too lean–did not solve–also seems possibly related to the angle I hold it at–seems to cut out quicker if blower tube angled more downward.
ANSWER : Your filter may be hanging up in the tank. you also my be losing compression

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Husqvarna 150bt – runs great (WOT) from a cold start for about 15 minutes, then almost just dies. If I immediately release the throtle when I sense it is about to lose power it may return to idle, but won’t power back up to full speed. I have removed and completely cleaned the carb and the little screen inside of it and replaced the spark plug. The Husqvarna dealer said it needed a heliarc – but that hasn’t helped at all. I have always used the commercial canned 50:1 92 octane gas. The blower is 3 years old. It is as if something goes wrong with it as it gets hot. I cannot find the fuel filter. My next thought is to see if the screen on the exhaust needs cleaning. Any help appreciated. thanks
ANSWER : Yes, the exhaust screen check is a must any time performance is low.
Your problem sounds like fuel starvation, ie. the fuel hose in the tank is broken or cracked. The weighted filter is on the end of the hose and has deteriated. You may have to replace the hose. Make sure to use the OEM hose as it is a special ethonal resistant material.
Additionally, if you can turn L and the H screw on the carb out (counterclockwise) about 1/8 you may find performance to be improved. Initially, most manufactures have leaned the mixtures of the screws to meet EPA specs., but performance suffers.

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My blower will not run at all it has spark but will not fire up tried started fluid still nothing not sure what it could be do you know what the compression is suppose to be. maybe rings are fried
ANSWER : Approx 60psi minimum. is your plug wet? or dry

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Will only develop power (and run somewhat properly) when the choke is engaged about 90%. Starts fine.
ANSWER : Sounds to me as tho you may have a loose carburetor or another part that is letting air into the system. Check all bolts and screws for tightness. Also, you may need to clean the carburetor or put some cleaner in your gas. Not too much, only about a tablespoon, but check the screws/bolts first.

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Starts runs a couple of minutes then dies – Echo Gas Blower 135 MPH390 CFM Blower PB250
sounds like you have a bad Ignition Coil (Module). This is how they act
when they start going bad. When they get warm, they quit. Some will
last up to 20 minutes before they shut down. You can sometimes find a
used one pretty cheap at a small engine shop.Jim

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Blower starts but shuts off when I close choke.
ANSWER : Hithere is a fuel delivery problem to find and fix

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Just bought a husqvarna 125 B blower at the end of last summer. It starts right up but when I give it the throttle, it bogs down and has no power. The fuel is fresh and clean and there is a new spark plug in it. I pulled the carb and made sure the ports were clear. Also checked the fuel line in the tank.

Is there a speed adjustment screw I should be looking at?

Any suggestions would be greatly appreciated.

ANSWER : Ajust the high speed carb screw or run on partial choke

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The blower will start sometimes and just this weekend when using would just stop. I have replaced the spark plug and have checked the stop switch. All is OK.
What else can it be, any ideas????????
ANSWER : Check to see that the air filter isn’t clogged. You may need to adjust the idle – there’s a screw on top near the handle – counterclockwise.

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