A couple times I've had to push a wire in the pee hole line cause it got blocked by some crap in the water. Only takes one day of sitting for it to plug. If you can get at it from both ends that's a bonus. I blame it on thick algae blooms. Have had to do my 150 2 stroke and the 8 hp kicker. Now when I get home I run the clean water through and flush both clean. Try cleaning that line out in the middle of a wavy lake