A 44mm cylinder and piston kit for the earlier engine in the Husqvarna 150BT and 350BT backpack blowers, the 50cc two-stroke built before the 2021 redesign. The kit contains the cylinder, piston, rings, wrist pin and clips for one engine, and replaces piston 502849601. The redesigned engine uses a different cylinder and piston, so look up your blower's model and serial number on its parts list: piston 502849601 or cylinder 502848701 means the earlier engine this kit fits; piston kit 531147153 means the 2021-and-newer engine, which takes a different kit. Most failures come from a lean condition, so pressure and vacuum test the crankcase and fix the air leak or fuel fault before assembly, and use a ring compressor.
- CYLINDER AND PISTON KIT - A 44mm cylinder with its piston, rings, wrist pin and clips, for one engine.
- FITS HUSQVARNA 150BT AND 350BT, EARLIER ENGINE - The 50cc backpack blowers built before the 2021 redesign. The redesigned engine uses a different cylinder and piston.
- HOW TO TELL WHICH ENGINE YOU HAVE - Look up your blower's model and serial number on its parts list: piston 502849601 or cylinder 502848701 means the earlier engine this kit fits; piston kit 531147153 means the 2021-and-newer engine, which takes a different kit.
- REPLACES 502849601 - The earlier engine's piston. The cylinder is the matched 44mm part for it.
- BEFORE IT GOES TOGETHER - Most failures on these blowers come from a lean condition. Pressure and vacuum test the crankcase, fix the air leak or fuel fault, and use a ring compressor.