Alright, so no difference.
I am afraid that things dont aways go your way when fault finding mowers.
From this distance I cant feel this jerking action of the pull starter.
Let me tell you that with a spark plug blocking the decompressors port there should be quite a lot of resistance when pulling the starter cord and it will be jerky when pulled slowly.
Now with a seviceable decompessor in, it should be easy to pull the starter cord.
tiger, have you tested the valve closes under suction?
