At survey we discovered the thru hull above the water line on the stb side of the aft lazerette has cracked. The exterior flange is only being held on by friction. The hose is a white corrugated hose. I couldn't trace it all the way but I believe it is the bilge pump hose. Two questions, is this actually the bilge pump outlet and is a standard marelon thru hull with hose barb the correct replacement?
My bilge pump outlet is center of the lower transom.
I can't picture the starboard of the aft lazarette. My aft lazarette is port side, so the starboard side of that is in the cockpit?
This is a Mk I so no walk through transom. Big lazerette aft of the wheel.
Don't have that hose thru the hull in my 1987. Think you need to trace it. It might be your electric bilge pump. Put water in the bilge with a weight holding the float switch down. Then remove the weight to activate the float switch and see if the water exits that hose.
The manual bilge pump hose is usually the white corrugated hose attached to your lower transom centerline shown in your photo.
The black hose should be your cockpit drain.
Whatever it is, (bilge pump or drain) the "above the waterline" thru-hulls are usually nylon—which degrade and break after a number of years due to UV. You can replace again with nylon or Marelon.
Sorry I didn't read the signature block first! I love my 1.5's walkthrough but envy that lazarette!