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I like to leave my drives in the down position when the boat is moored to take a load off the trim rams and more important the hoses. I put them fully down then just tap the up to take the pressure off the hoses. (If you do this on land you can visually see them "relax"). I was going to add I would relax too if someone took that much pressure off my hose but that might not be appropriate on a family forum, so I won't!
Anyway, there is also another reason to place the drives down while moored. If the drives are left up (and lots of people do this) the extended bellows make a tempting invitation for muskrats and river otters.
Quite a few boats have been sunk over the years, where I boat, by these water critters either gnawing away for fun or looking for a nest. They are the prime suspects in the recent sinking of a 35 foot cruiser in the marina beside mine. I walked by it to have a look and it was a very sad sight. If you want to see a picture you can google Recorder and Times Brockville and scroll down the news leads to see it.
As an added bonus you will first come across a police bulletin asking boaters to look out for a Sea Ray 370 with a sea doo Spark on its lift that was recently stolen.
Not the best week for two local boaters.
so....keep those drives down! :-)