Easier said than done on my Islander. You would have to pull the aft deck hatch.I run it dry then pull the hose off the seacock and just stick it in a gallon of pink stuff and run the washdown till pink comes out.
Good point - I have no idea what the access is like on his 265. I also agree that mid-December in this area is nothing to worry about when the boat is in the water regarding anything down in the bilge since the water will keep that area above freezing.Easier said than done on my Islander. You would have to pull the aft deck hatch.