C&C 27 Association Forum

Standard fixed blade propeller is 12" x 9" x 78" RH (12 inch diameter, 9 inch pitch, 7/8" shaft diameter).  I replaced mine with a 13" x 9" x 7/8" Gori folding prop and it works well.  Hull speed about 6 knots max at full engine revs around 3300 RPM.  Cruises quite well at 5 to 5 1/2 knots at around 2500 RPM.
Dragonfly C&C 27 Mk V

I found the same problem that Yves noted - I have a 1985 MkV. If any water gets under the floor in the forecabin area - under the liner - there is nowhere for it to go.  There is no drain back into the bilge.  So the water stays there, smells, and rots the bottom of the forward bulkhead.  To stop the water getting in, seal the chainplates where they go through the deck, and the babystay mount.  (Watch for rot in the balsa cores where these go through the deck if there have been any leaks).  There is another stange place where you can ge an unexpected leak.  The anchor locker is a separate moulding with a drain that goes straight through the stem - its about a 3/8" hole.  Trouble is, they didn't seal the anchor locker to the hull very well, so water in the anchor locker may drain down under the forcabin instead of going overboard.  Also if the forestay/deck joint leaks (mine did), that will drain into the anchor locker, and if that leaks, into the forcabin.  Test - have someone throw a bucket of water into the anchor well, and watch through the compartment under the forward berth to see if any of it comes in.  Remedy - seal the joint between the anchor well and the stem of the boat (I used epoxy) - where the overboard drain goes though.  When you have fixed all the leaks, keep the area under the sole of the forecabin as dry as you can.  You can get at it through the inspection hatch under the forward berth, and also under the forward sink if you have one.  If anyone has figured out how to install a permanent drain from this area to the bilge, without damaging the integrity of the bulkhead and keel joint that is right in this area, I would very much like to know.Dragonfly C&C 27 Mk V

There probably is, but common places for this leak are the chainplates and base of the baby stay.  My 1985 MkV had the same problem.  Fixed it by removing chainplates and baby stay and carefully re-sealing.  I also had an additional odd leak at the forestay.  Odd because there it leaks down into the anchor well.  This is supposed to drain overboard - there is a 3/8 hole straight through the stem for that purpose.  Trouble was anchor well was not properly sealed to the hull, so water going through the drain went down below the forward cabin instead of overboard.  You might have the same problem.  Any water going down there stays and rots the bottom of the cabin bulkhead - common problem - because there is no drain back to the bilge.  There probably ought to be, because water always gets under the forecabin floor and just stays.  You might find out if someone' figured out how to drain this away - I haven't!  Note - if the leaks are around the chainplates, check for rot in the balsa core there and treat it properly.  Good luck.
Drangonfly C&C 27 Mk V