In a previous video, I attempted to repair 4 free chainsaws. This Husqvarna 440 had low compression and wouldn't start so I set it aside, assuming it needed a new piston and cylinder. I cannibalized the oil pump from this saw to repair one of the others so I needed to replace that too. I was able to find aftermarket parts for around $50 bucks so I decided it was worth trying to fix. See the links below for the parts and tools I used:

Piston & Cylinder Kit:
https://www.ebay.com/itm/133485836142

Oil Pump:
https://amzn.to/3ggQOpW (affiliate*)
~OR~
https://www.ebay.com/itm/122592795614

Carb Adjustment Tool:
https://amzn.to/3k0QiLc (affiliate*)

Compression Tester:
https://amzn.to/3x0cAnI (affiliate*)

Hemostat Locking Forceps:
https://amzn.to/2Uxik7l (affiliate*)

Zoom Oiler (like Mustie1 uses):
https://amzn.to/2QcbXGS (affiliate*)

*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support!