Can you Email me a Video of how the valve is acting when you turn over the engine?
Sorry I get Your post too late :( Gas can't be weak, It's from Shell and it's fresh 100+ octan V-Power.
Cover is out now. Valve spring is broken, also governor wheel is completly broken. I will put some photos later, have to work now ;)
I promise to clean workbench after work ! :))
I have downloaded Tecumseh Repair Manual for my engine - it's great !
Have good day You all and Thank You for helping me. This is first time I'm repairing gas engine.