Husqvarna 125B Leaf Blower Disassemble and Rebuild

The Husqvarna 125B is a very popular handheld leaf blower. These leaf blowers sell new for around $150 and come with both the round and duck billed secondary blower tubes. This makes them a very good deal because you can get high air speed with the duck billed tube, or high air volume with the round tube giving you the best of both worlds with one machine for one great price. But at $150 for a new unit, it’s not really worth it to take it to a repair shop to have one tuned up or diagnosed when it’s not running or has some other issue. So in this video we show you haw to completely disassemble a 125B leaf blower and rebuild it. Now in this video we do NOT disassemble the carburetor. The reason we don’t disassemble the carb is because you can purchase a whole new carb already assembled and ready to go from Ebay, Amazon, and other places for round $20 (or even less depending where you look). So it’s not worth the time for us to explain how everything in the 125B carb works and what parts go where AND it’s not really worth your time and money to purchase a rebuild kit for $10 – $20 when you can get a whole carb for nearly the same price.

This blower was purchased at a flea market for $15. We could tell when pulling the starter rope that it had decent compression so we took a chance on it. compression is the most important part of any 2 cycle engine! If it doesn’t have at least 125 lbs of compression, then your repair is going to get VERY expensive Very fast. We got pretty lucky with this 125B and it started right up after we reassembled it, mostly thanks to some fresh 50:1 fuel. The new spark plug was also a big help in the case of this blower. So hopefully we were able to show you a few things to help you save some money on repairs and help you score some good deals on some power equipment. A good running leaf blower like this 125B is always handy to have around for cleaning up the flower beds, sidewalks, porches, decks, rain gutters and other odd jobs around the home.

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7 thoughts on “Husqvarna 125B Leaf Blower Disassemble and Rebuild

  1. why would you skip one of the most confusing parts? I was liking your videos and looking forward to seeing how to correctly re install the piston/crankshaft into the cylinder.

  2. I will tell you what I found on my 125B blower. Ever since I bought it in 2015 the air filter box had been loose. I would occasionally tighten the nuts holding it to the carb. However,over time they would loosen again. Finally, I took everything apart and you will probably be surprised what I found.
    I figured it would either be the intake boot or the standoff block. It was neither. The person that built my 125 had not put one of the carburetor bolts into the flat on the standoff. In fact they had the rounded part of the bolt over the flat and had used a nut driver to completely collapse the flat on the standoff block. This is why I could not tighten the nut with my nut driver, because it was free to turn instead of being constrained by the flat built into the standoff block. My carb had been leaking like a sieve between the carb and the standoff. It took me over an hour to get most of the grime out of the covers and off the engine. I also had to drive the bolt out of the standoff because it had elongated the hole in the block, actually termed a thermal insulation block. This block was also not tightened properly to the crankcase pan and must have been wobbling all over the place during operation. I replaced the boot and the block, 1184’ing them all together. I also put 1184 on both gaskets, except on the sides facing the carb. After re-assembly I picked up double the compression and it works fine, now and I can press the primer bulb without the air filter box even moving, as was the case before.

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