Quote:
Originally Posted by DonH57
Thanks for reminding me to finish checking and adjusting ours. I always wondered if mowers gradually move them out of whack by turning thru the yard during their mowing. 
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On mine close to the street I make sure the doughnuts are above
The the sprinkler pop up head. If not mowers or cars will damage them or the main line below. Also, on most the the pop ups won't retreat back down and stick up I dig down enough to hole the base and unscrew the top and pull the guts out, clean the seal above the spring and shaft. This usually works, if not I just change the guts with spare parts I have from replacing some.