Seacocks open or closed when boat on hard for storage?

[scross]

Diesel inboard topic here.
I’ve mulled this off and on for the past decade. I see advantages and disadvantages of leaving the seacocks open to drain or closing them so they don’t drain to the seastrainer. I’m talking about taking the boat out of saltwater not freshwater.
For winterization the systems are flushed with freshwater and antifreeze so I think the answer for that situation is to keep the seacocks closed.
But what to do while the boat is on the trailer or lift for a couple of weeks?

 

[Red Raven]

Hi Al,

I think you are correct. Keep the Seacocks closed in both cases. In the case for a couple weeks storage I would flush the system with fresh water with the seacocks closed similar to winterization but with just fresh water.

I would rather have fresh water in there than a dry impeller that won’t prime.

Curt