When I received my CS4, I tore it down a bit. Took the cylinder off the crankcase housing (trying to see where the grease goes, but couldn't really tell), and took the grease pot out. There was a pretty big air gap in there. So I put it back together and screwed in the grease knob 2-3 turns (it spun VERY easily) until I felt a little bit of back pressure, then I backed it off til the previous click. Had I not done this, I would probably have run it for about 15 hours until I was actually pushing grease into the cylinder head. Not good...Thought about it, but I'm trying to follow the instructions to a T.
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