This Forum is supported by C&C 27 owners like you whose membership in the C&C 27 Association makes possible this Forum and the accompanying site. Thank you, members, for your continuing commitment.
You are not logged in.
Pages: 1
Just finished doing a careful inventory of all the throughulls on our "new" 1974 Mk II as part of its year-long refit. Looks like most are original. I'll need to do some revising, but I would also like to reduce the number of throughulls. Any thoughts about the following?
1. Removing the sounder transducer through-hull, glassing it over and using an in-hull transudcer instead. The old sounder is dead and needs replacing anyway. Looks like a no-brainer decision: I see others have reported sucess with C&C 27 in-hull transducers at that location (presuming I keep bubbles out of my closure). I've had great success installing in-hulls in my previous two boats, both using the Airmar kits that make it so easy.
2. Someone asked in an earlier thread about re-routing the cockpit drain underwater throughulls to above-water throughulls in the transom. I did not see an answer. C&C's designers must have had reasons for doing it the way they did, but it would be nice to have the peace of mind if it is safe to go the transom route, and it would be nice to get rid of the plumbing around the stuffing box/transmission, to free up some room to work. Downsides to changing to the transom:
2a. No longer a direct route for water drainage: the bend in the hose could get clogged.
2b. Longer hose run.
2c. Water likes to go downhill, and nothing is more directly down than vertical.
3. I keep wondering how to consolidate the two sink and one toilet intake throughulls, but
3a. The sinks are too far apart to make the run practical, and on opposite sides of the boat.
3b. The toilet needs to suck seawater not contaminated by sink garbage, although the manual pump systems seem able to handle seaweed and sea life nicely.
4. Being a purist navigator, I want a speed log for STW to compare with GPS SOG, so that throughull stays.
5. The engine raw water throughull stays, of course. But that throughull looks original, is a gate, and the bore is narrowed a bit by years of seawater crystals, so it will be replaced.
Thanks for your thoughts.
---------
1974 C&C 27 Mk II in PEI
Last edited by (2008-06-29 11:09:56)
---------------------
1974 Mark II C&C 27
Offline
Thought on "the following":
You are making work for yourself.
1. Installing an in-hull transducer makes absolute sense if there's no hole already. Glassing the old hole then installing an in-hull sounds like a task that the government would invent -- the ten minute task of replacing a through-hull transducer suddenly has ballooned to two days. How many boats are sunk every year by blown transducers?
2. All of your objections are valid, plus you're glassing holes again that could easily be filled with nice safe & secure new through-hulls. All you need in addition are new drain hoses and you're fire-proof for twenty years.
3. You could combine the head sink drain and toilet intake. That saves a hole in the hull and one seacock, but I'd hate to try to do glasswork inside that cabinet.
Overall, my preference would be to replace the gate valves that you probably have throughout with modern seacocks. As to the rest, either save your energy or bend your energies to more productive ends. I don't wish to sound abrupt about your obvious desire to improve the boat, but there is quite enough to do in restoring a boat without in the process trying to redesign things that already work reasonably well.
David Weatherston
Towser, Toronto
C&C 27 Mk IV
David Weatherston
Towser, Toronto
C&C 27 Mk IV
Offline
Phew - got the first thruhull out - the head sink drain. The original gate valve bronze was in excellent shape, but (a) it is a gate, (b) the gate was not closing fully and appears to be corroded, and (c) the sealant had become useless after 34 years. Time for a new ball valve seacock on a modern thruhull.
The key to removal was a step wrench from Stright MacKay - best $38 spent so far on this refit. Once I found extender bars for the handle (10 stores later) and got the right alignment, it only took the first mate and I 5 minutes to get it undone and out.
---------
1974 C&C 27 Mk II in PEI
---------------------
1974 Mark II C&C 27
Offline
Pages: 1