I've been tracking down vibration in the boat at low throttle. As part of the exercise I have installed new engine mounts and a silicone hump hose. Both helped (engine is now very smooth), but there remains a banging noise that seems to come from behind the wooden liner in the aft cabin on the starboard side. I'm guessing it's a sympathetic vibration and am wondering if the filler hose on that side is not secured. Has anyone removed this liner and what's the procedure?
Thanks,
Doug
SV Evenstar
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Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____
Doug-
The pannel can be readily removed by taking the screws out. To do this, the mattress has to be removed. I think- the shelf/ box over the back of the engine has to be removed also- that has two latches and easily moves out of the way. The fuel tank is behind the pannel. Maybe your pannel is loose, or the shelf is not latched.
Paul & Wendy Keyser
"First Light"
Rye NH
2005 C36 MKII #2257
Wing, M35B
Hi Paul, thanks for your reply. I think you may be thinking about the panel on the port isde of the boat behind which is the fuel tank. I agree with you that it would be reasonably straightforward job. In my case I'm hearing the vibration noise coming from behind the wooden paneling on the starboard side of the aft cabin (see the photo). I could just try to pull things apart but thought I'd check first to see if some adventurous soul had already blazed that trial and found any tricks or things to watch out for.
Thanks again!
Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____
Doug-
Aha....I wrongly assumed you meant the port pannel. Sorry- I've never pulled the wood pannel trim out from the starboard side. I assume it is attached to the hull liner rather than the hull itself? Very odd that you have a vibration sound from that area. Have you removed the drawers from the adjacent locker to get a look in that area? I would think any hull liner would be bonded to the hull in that area, and there would be insufficient room to snake any large wires or other things that might rattle behind the wood pannel. Is the wood itself solidly mounted- does it flex when pushed on? Maybe that is the cause?
Good luck
Paul & Wendy Keyser
"First Light"
Rye NH
2005 C36 MKII #2257
Wing, M35B
Hi Paul, thanks for your suggestions. Yes it is odd to have a sound coming from that area but I used the old solid stethescope trick with a stick to place between the surface and the bone near my ear (like you might do on a cylinder head). Maybe the wood itself is loose, although it seems to be sturdy. In any event I will try to track it down as it makes quite the racket under 1000 RPM. I will see how the panel comes apart later this year and will post back with what I find in case it helps anyone else. Cheers.
Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____
Hi Doug,
FWIW, we have an occasional “buzzing” vibration noise at lower rpms. Ours is one of the cockpit seat lids. Just stand on them and see if the noise goes away. Amazing how much noise it can make.
wally
Wally
"Onanne"
2000 MKII, deep keel, tall rig
Lake Champlain
Thanks Wally. Completely agree - the seat and locker lids can vibrate with a hell of a racket, especially if the locks are still in place. As you mentioned, I've stood or sat on them to kill the chattering and my mystery vibration is still there. Thanks for your suggestions!
Doug
Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____
I removed that liner for refinishing many years ago when I first bought the boat. If I remember you have to remove the wood trim pieces on the sides and maybe the top. They are held in by screws. I believe the white shelf material on the bottom must also be removed - screws also. The shelf and trim help to keep the wood (ash I think) liner in place. You can simply pull the frame from porthole. It is held on by a Velcro type fastening. It's all easy enough to do. However, I don't know what is behind there that would cause the vibration you are looking for. Good luck.
Pat T, 1995 TR, wing keel, #1388
"Liberty Call"
Burnham Harbor, Chicago
Hey Pat, your experience in taking this apart is what I was ideally looking for. It's good to know that it is a straightforward disassembly. It's the stuff like pulling apart hidden Velcro fasteners I'm concerned with since before you actually know it's Velcro underneath (and not a hidden screw or glue/sealant) you're never quite sure how hard to tug or pry on something in the event that it breaks. Thanks!
Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____
Doug-
I was on our boat recently. I pulled the drawers out of the aft cabin cabinet and took a quick look in the area you are hearing a noise from. The cabin liner and hull do have a couple inches of seperation- so something might be banging around- if someone dropped a tool or something between the liner and hull. There were no visible cables or plumbing- but again one would need a mirror and flashlight to see between the liner and hull.
Good luck
Paul & Wendy Keyser
"First Light"
Rye NH
2005 C36 MKII #2257
Wing, M35B
Hello again Paul. Thanks so much for having a look back there for me. All these replies from folks are useful good info. I too was on our boat last week but this "vibration chasing project" is further down the list of Spring work and with the boat on the hard it's not practical to be running a the engine for testing anyway. Evenstar should be in the water by mid May and so will report back on my findings after that. I appreciate your follow-up!
Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____
Hi Doug,
when we first bought ours, (2000), we pulled some wires from forward to the port, aft lazzerette. Being much younger, I squeezed down into the space and found pvc pipes that held wires. My memory is a bit fuzzy, but I believe they run just under the shelf in the aft cabin. I also installed a remote VHF outlet back by the helm, just aft of the “winch handle” nook in the cockpit. I also had to get into the locker to do this. You can see right up to that box from the lazzerette. The water tank fill hose should be visible from this perspective.
Also, and this is a bit fuzzy, I’m pretty sure we had to remove the complete drawer unit from the aft cabin in order to run the wires. The drawer unit is essentially a plywood box that precludes getting a good look aft. It’s simple to take it out, just held in with screws around the frame. With this out, you just may be able to see back to where you want.
Wally
"Onanne"
2000 MKII, deep keel, tall rig
Lake Champlain
Hi Wally,
Many thanks for the additional information. With your comment about removing the aft drawer set in its entirety, and all of the assistance from others above, I think I know how I can approach the deconstruction from any angle. The 'box of drawers' in the aft cabin sounds similar in concept to the one on the aft side of the galley sink which, BTW, looks like it will have to come out to change the water heater - another project I have planned but not part of this thread.
Thanks again Wally. I'll let folks know what I find about the source of the sound. - Doug
Doug Somers
S/V Evenstar #1549
Port: Kingston ON, Home: Ottawa ON
1996 C-36 Mk II Standard Rig M35AC _____/)___/) /)____