Regarding seacocks on transom thruhulls - what do you mean by "they appear to be below the waterline"? Either they are or they aren't, and it should be pretty easy to determine this (are they submerged or not when the boat is at the dock?). I'm not familiar with the 34+ but looking at some pictures on Google Images it looks like the transom is similar to the LF38, which would mean the exhaust thruhull and others are above waterline, but can be submerged when you're pitching a lot in a wavy sea state.
The recommendation for seacocks is have them on every thruhull that is below the heeled waterline. Whether you consider transom thruhulls that are 6-12" above waterline as being below the heeled waterline is probably debateable. What I've heard is most people don't bother with them (especially since access to them is usually a giant pain, so the seacock would rarely be closed) - *unless* you plan to go offshore a bunch. Although even offshore if a hose pulled off you could probably just stick a wooden plug in (or potato or any of the other thruhull plugging devices). So it's a matter of personal preference / your own paranoia level. I'm pretty paranoid about below waterline thruhulls but for the transom ones I've decided there are bigger risks to fry first. -Patrick C&C LF38 Seattle, WA On Sun, Jun 14, 2015 at 9:00 AM, <cnc-list-requ...@cnc-list.com> wrote: > > From: David Pulaski <davepula...@hotmail.com> > To: "CnC-List@cnc-list.com" <cnc-list@cnc-list.com> > Cc: > Date: Sun, 14 Jun 2015 11:16:14 -0400 > Subject: Stus-List 34+ transom thru-hulls > So I'm the proud new owner of a '90 34+, and the first project I bit off > was replacement of the exhaust hose from the muffer back, including the > thru-hull. > > First off, this is not going to be fun because the hose runs under the > fuel tank and span of the cockpit under the water heater where it is > completely inaccessible. I'm hoping I'll be able to pull the new hose > through by clamping it to the old hose with a double-ended barb, but it > seems like it's an awful tight fit under the tank. If anyone else has done > this job and has any suggestions, I'm all ears. > > Second, the thru-hulls themselves. There are 4 thru-hulls just under the > transom - the exhaust, the two drains for the propane tank & steering > quadrant well, and the bilge pump. All 4 are plastic mushroom-head > thru-hulls, and I want to replace at least the exhaust thru-hull with a new > marelon one. Question: none of these thru-hulls have seacocks on them, > which seems odd (and unwise) to me because they appear to be below the > waterline. What are your thoughts on putting a marelon ball valve on the > new thru hull while I'm at it? I'm tempted to replace all 4 of them with > new thru-hull and valves. Am I just being paranoid? > > Thanks all. I'm thrilled to have this boat and I'm sure I'll be pestering > the heck out of this board! > > -Dave > 1990 C&C 34+ "Faith Anne" >
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