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Go Back   SailNet Community > On Board > Gear & Maintenance > Shaft Log Leak (Pics)
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Thread: Shaft Log Leak (Pics) Reply to Thread
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Topic Review (Newest First)
05-06-2009 07:32 PM
sailingdog good news...
05-06-2009 06:54 PM
nk235 ****UPDATE*****

So today I was down at the boat and really took a look at this little problem. It turns out my shaft log and that whole area is fine and there is NO LEAK! Turns out the glassed in piece of plywood that the water lift muffler sits on, is not even connected to the solid fiber glass of the boat below and around it. It is just glassed in on the sides and over the top but I can stick a piece of a sail batten all the way through the slow between the fiberglass and the plywood where I original thought it was leaking. The forward and rear edges of the plywood are exposed and the whole piece of wood over time has become water logged between the shaft drip spray, the rudder log and just general wetness in this area. The "spray" leak I saw when the boat was in gear was just the vibration rattling water out of it.

Well as I said, I pried it up with the piece of sail batten and let the whole area get some air under there. Problem solved! No leak what so ever as right under that plywood is solid fiberglass. Also today my rigging got finished and the furler installed and genny bent on! Boat is now 100% ready to go so today was a good day.
04-30-2009 05:19 PM
nk235 Hey Barry - Congrats on getting the boat in. I'm sure your excited and we def have to have a beer in person one of these days!

Don't know when I'm going to get down to the boat next since the weather is supposed to suck for the next few days but myself and the rigger are going to attempt to finish up with my rigging tomorrow. If I do go down there I figured I would mess around with it a little more but at this point I'm not too worried about it.

Anyway I'm sure I'll see you down there soon

Take care,
Nick
04-30-2009 10:59 AM
BarryL
A test to perform

Hey Nick,

Sorry to hear of your problem. My boat got splashed yesterday.

If you can get out and sail on a breezy day you can determine once and for all if the problem is the engine or the shaft log. Sail on windy day, turn the engine off, and put the trans in neutral. The shaft should freewheel (assuming you don't have a feathering or folding prop). If you have a leak, it's the shaft. If no leak, then it's the engine exhaust or something like that.

Good luck and let me know if you need a hand testing things.

One last thing, I don't think it will be possible for you to apply anything from under the boat. I doubt you will be able to see where water is getting, and I doubt you could apply anything that would stick and make a seal.

Barry
04-29-2009 11:16 PM
Capnblu Sorry, but I do not think you will be able to be 100% sure where or how your leak is located before you actually haul it. Some others ideas of patching for the season, may work, just remember, or consider the removing of any patch that may interfere later. Is it possible that this area froze last winter? If so I would expect to encounter some de-lamination when you get into it. Good luck.
04-29-2009 07:54 PM
nk235 True - I think I will do both - take a look at other boats and then also try a small pin hole to see. I figured worst case water comes out but since the hole I drilled is so tiny I can easily patch it up then haul the boat. Best case no water comes out and I am able to investigate further with a possible larger hole. If it is a leak in the shaft log I would hope that area under the platform is hollow and so long as there is no water in there I can cut out a section of that platform, locate the leak in the shaft log, and seal everything up. But first I am going to start with the tiny hole. Wish me luck
04-29-2009 07:46 PM
JohnRPollard
Quote:
Originally Posted by nk235 View Post
... I am curious and tempted to try drilling a small hole into that platform that the muffler is screwed onto just to see what happens - if it is solid or hollow and if water comes out. What do you think? Dumb idea?
Not sure. You might try it -- but like erps says have a plan.

Maybe take a stroll around the boatyard looking for a similar aperture arrangement, so you can study how the tube seals at the aperture opening. This might give you some better insight into what you're potentially dealing with.
04-29-2009 07:38 PM
nk235
Quote:
Originally Posted by erps View Post
That would yield some valuable information. I'm guessing it would yield some increase in your heart rate while the hole is being drilled though. You'll need a plan to stop the leak if you strike a gusher.
Yes I will be prepared to stop the leak but am only planning on drilling a very very tiny hole so even if water does come out I can stop it with my pinky. More so it will tell me the seriousness of the problem and if I do need a haul now or can wait till end of season
04-29-2009 07:28 PM
erps
Quote:
I am curious and tempted to try drilling a small hole into that platform that the muffler is screwed onto just to see what happens - if it is solid or hollow and if water comes out. What do you think? Dumb idea?
That would yield some valuable information. I'm guessing it would yield some increase in your heart rate while the hole is being drilled though. You'll need a plan to stop the leak if you strike a gusher.
04-29-2009 07:14 PM
nk235 John - Yes I can say by just the picture of your boat in your signature it looks exactly like mine. I am thinking along the same lines as you right now by trying to seal the leak in the boat and then once the water warms up a bit diving under and applying something on the underside. I am curious and tempted to try drilling a small hole into that platform that the muffler is screwed onto just to see what happens - if it is solid or hollow and if water comes out. What do you think? Dumb idea?
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