I am stumped. The blower starts easily and runs well for 5-10 minutes then bogs down under full throttle. I replaced the fuel filter assuming it was a fuel starvation issue. Didn’t solve it. I had an extra carb so switched it out. Same exact symptoms persisted. Tried adjusting the mixture screw, no difference. Changed the sparkplug, no difference. I put an inline spark detector on and ran it. Showed spark when it bogged down but not as bright, so installed a new coil. Same symptoms. The fuel is fresh. The air filter is clean, almost brand new. Tried running it with the fuel cap loose and it still bogged down after a few minutes. Nothing has worked so far. Could the fuel line be collapsing? Anyone have any ideas? BTW, this has the newer carburetor.
150BT backpack blower
- Thread starter Oddjob
- Start date
Thx Rivets, will try that tomorrow at a decent hour. I forgot to post that I had checked the spark arrester screen. It was clean.
If the muffler gets eliminated as a cause, could there be something internal in the carb that would cause this, like a failing diaphragm? I can’t understand how a diaphragm would be ok for ten minutes and then quit. If it was bad, I would think that it wouldn’t pump from the start.
If the muffler gets eliminated as a cause, could there be something internal in the carb that would cause this, like a failing diaphragm? I can’t understand how a diaphragm would be ok for ten minutes and then quit. If it was bad, I would think that it wouldn’t pump from the start.
Tiger Small Engine
Lawn Addict
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If the blower is getting up to speed fine, then it is not the spark arrestor.
You have replaced a lot of parts. Are the replacements OEM or aftermarket? How old is it?
I had this problem on my old chainsaw. After lots of aggravation , I discovered that the ends of the fuel lines weren’t fitting as tight as they once were, and was allowing tiny air bubbles to enter the line at full throttle. I replaced both fuel lines with high quality ethanol resistant lines and problem solved.
I think it is a 2022 model based on the appearance of the carburetor and what my daughter-in-law thought she remembered about when she bought it. The serial no. is 20223302062 but I couldn’t find a definitive way to read Husqvarna serial numbers for year of manufacture. One source said that Husqvarna uses the first two digits for year of manufacture but I am pretty sure it is not a 2020 model.
The filters are aftermarket. The spark plug was oem, the replacement was aftermarket. The carb that is on there now is the oem carb that I removed a year and a half ago when I had replaced crumbling fuel lines. The fuel line is what came with the aftermarket carb.
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11 digit serial numbers
First 4 is year.
Next 2 is the week of the year.
The last five digits show the sequential production number (e.g., 00362 indicates the unit was number 362 in production order that week).
First 4 is year.
Next 2 is the week of the year.
The last five digits show the sequential production number (e.g., 00362 indicates the unit was number 362 in production order that week).
Thx.