Good advice above.
I'll just add that there's no need to swap out the "blank" and insert the knotmeter impeller just now. Leave the blank in place at least until spring. This will protect it from any possible ice damage, etc.
Next year, you may find as we do that the impeller gets fouled fairly quickly by marine growth. Which means you'll have to clean it often for it to operate properly. You can clean it by diving, or by pulling it out (swapping with the blank). Sometimes, depending where it's located on the hull, it can be reached with a long-handled brush.
FYI, we don't even bother putting ours in any more. It gets fouled very quickly, and we have boat speed (over the ground, anyway) via gps.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Pacific Seacraft Crealock 31 #62
NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT