runner1909 0 Report post Posted May 7, 2012 The owner's manual says to open the seacock when cruising. Someone told me only to open it when running the A/C. This is in regards to a 1999 262. Share this post Link to post Share on other sites
Rip5 0 Report post Posted May 8, 2012 You need to have it open for A/C. And you can just leave it open when cruising as well. We only closed ours at winter lay-up. Share this post Link to post Share on other sites
Artemus 0 Report post Posted May 8, 2012 All of mine are closed when I'm not on the boat, or I'm running it out on the lake. Share this post Link to post Share on other sites
calmond 0 Report post Posted May 15, 2012 I close mine twice a year to test them and when I am cleaning the strainers out while on the water. Other than that mine are open 24/7 365. If your boat sits in the water like my old boat did then I would close them when I was not on the boat as that will reduce your chances of a hose coming lose and sinking your boat. But if your boat sits on a lift or in a storage facility then you might as well leave them open. Share this post Link to post Share on other sites
