Husqvarna 543 XPG Oil Pump Repair. Part 1

I got this high value professional Husqvarna 543 xpg. It started but died quickly. I found an affordable carburetor only one place and that was " neotec chainsaw ". Changed the carburetor...but problem the same. It was the good looking fuel line that had a hole in the passage between back handle and engine housing. Common problem on many models...be aware ! On this model it was easy to change the fuel line with standard common size fuel line from China. Than the problem I discovered it did not oil. Just a very very weak squirt came out time to time. I went on trying to locate the fault and repair it. A very very long bla bla bla clip for those special interested. A highly valued model among those that know. Heat in handle works. Power weight ratio is one of the best there is. Durable as it is professional saw. A better expert than me should and probably would...tune it better than I have done. I guess it should have higher rpm on high...this one. That said...I did not still spend much focus on tuning this saw ...this far. Just fixed it yesterday ! :-)