Ryan and Kelly,
perfectly normal. The sound should make you happy as it means sea-water is
flowing through the engine and out the exhaust. The vented loop is mounted with
a hollow bolt and no valve. Some systems opt to install a valve but it is just another
thing that can go wrong. Simple is best.
As an FYI, this
bolt will also whistle. It you are at a calm anchorage and the boat rocks a
little, air can be forced back up the exhaust at the water line and every once
in a while the hole will whistle. This drove me crazy for a while. It can be
stopped by stuffing a rag into the scupper by the vented loop air exit (and
putting a note on the engine control panel to remind you of the rag).
- Cream Puff - SM2K - #275
[Attachment(s) from Ryan Meador included
When I started my engine (a TMD22) this morning, I heard the
sound of water running down the cockpit scuppers. The vented loop right
under the engine room hatch discharges into the trough at the aft end of the
cockpit, and apparently it has decided to start squirting water (photo
attached). At idle, it is a squirt every few seconds. At 2000rpm,
it's a steady stream. The amount of water coming out the exhaust at the
waterline looks normal, and the engine temperature also appears normal.
Without disassembly, I don't see any obvious sign of a valve in the vented
loop, and the water isn't coming from what I presume is the vent at the top,
it's coming through what I thought was the mounting bolt. I seem to
recall seeing a thread about this before, but I can't find it searching on the
Yahoo group. Even just learning the proper name for this thing would
probably help. What should I check out?