Thanks for the tips.
I'm assuming that the unit comes out as one when loosening the two side screws, and NOT the big nut in the middle first. I could just undo the middle bolt and just take the spring assembly out and push the plunger back in further if I was sure it was not stuck, correct? I'd rather take the entire thing out, dis-assemble/clean/inspect, and reinstall since I have the gasket anyway.
I have seen it said you can install a washer or two on the other side of the spring to add tension to it and help it get to those last few clicks easier. Thoughts?
Is it possible to over tighten the chain by pushing on the tensioner too hard?