ENGINERUN 44mm Piston & Ring Kit for Husqvarna 150BF/150BT/350BT – 1.2mm Ring, Wrist Pin Included

If your Husqvarna backpack blower is showing reduced compression, excessive smoke, or loss of power, replacing the piston and ring assembly is often the precise repair needed. This ENGINERUN kit contains a 44mm piston, a 44mm x 1.2mm piston ring, wrist pin and retaining clip—built to match the fit and function of the listed OEM part numbers so you can restore performance without replacing the entire engine.

Will this piston kit fit my Husqvarna model?

Yes—this assembly is designed for specific Husqvarna backpack blower models that accept a 44mm bore piston. Confirm the original OEM part number or bore size before ordering to ensure compatibility and proper installation.

• Compatible with: Husqvarna 150BF, 150BT, 150, 350BT models
• Replaces OEM number: 502849601 (and variants like 502 84 96-01)
• Bore size provided: 44mm piston diameter
• Note: cylinder is not included—this is a piston assembly replacement

How do I install the ENGINERUN 44mm piston ring kit?

Installation requires disassembly of the engine to access the piston and wrist pin; basic mechanical skill and standard small-engine tools are needed. Follow a service manual for torque specs and ring orientation to avoid damage and ensure correct sealing.

• Tools typically required: socket set, snap-ring pliers, torque wrench, feeler gauge
• Verify ring end gap and orientation before final assembly
• Replace or inspect cylinder, bearings, seals and gaskets while engine is open
• Use manufacturer torque specs and clean mating surfaces thoroughly

What’s included in the kit and what should I check before ordering?

The kit includes the piston (44mm bore), a 44mm x 1.2mm piston ring, wrist pin and retaining clip as shown in product photos. Before buying, verify your engine’s bore measurement or OEM part number to ensure a correct fit and consider replacing related wear items while you have the engine apart.

• Included: piston, piston ring (1.2mm), pin, clip
• Not included: cylinder, gaskets, bearings—order separately if needed
• Inspect cylinder walls for scoring; replace or hone as required for proper sealing
• Confirm bore and part number match to avoid returns

Who is this for: This ENGINERUN 44mm piston kit is intended for DIY mechanics, small-engine repair shops, and property owners who maintain Husqvarna 150-series and 350BT backpack blowers. If you are restoring compression, repairing a scored piston, or replacing OEM 502849601 components, this kit supplies the core parts needed for a piston replacement job—just ensure you have the tools, service information, and any additional seals or hardware required for a complete rebuild.