vented

I have a siphoning question about the bilge pump vented loops. I recently installed a second automatic bilge pump slightly higher than the original in my 1970 E32. I put the outlet near the top of the transom on the port side because there was already a hole there. I have a vented loop...

I have an E27 with a Palmer P60. This is a raw water cooled engine with a water lift muffler. The exhaust hose currently rises from the muffler to the top of the lazarette then loops back down to the thru-hull outlet. Should I place a vented-loop in the exhaust line? Thanks in advance. Steve...