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Post by on Feb 19, 2024 19:31:48 GMT
I'm now wondering if it is the halfshaft which is noisy. Tomorrow I shall get the boot orf and investigate.
Did initially think it might be the 2 bolt flange bearing but it doesn't seem too bad. That bilge did get high so I wonder if the boot was breached.
Ford Fiesta halfshafts (or more accurately half halfshafts) I think.
The coupling arrangement is a little complicated I think there is a tailshaft/prop protecting shear pin somewhere in the line but it is all a bit clever looking so I am disinclined to mezs. I'd like to reduce the bearing noise..
The odd thing is the other one was noisy for a while then stopped. I don't think it is the gearbox but its possible..It could also be the outer stern tube bearing which would be more complicated to deal with.
It is possible one of those fisherwanker metal tracer lines got into the rear seals. That would be a dry dock or beaching job..
I guess at some stage dry dock and withdrawal of the shaft would be worth doing if the noise remains. Never good to have extraneous and potentially avoidable noises.
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Post by Aloysius on Feb 19, 2024 19:42:45 GMT
Could just be a worn bearing though. Then you can blame the bearing manufacturer.
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Post by on Feb 19, 2024 19:50:53 GMT
I twnd to think it is the pillow block. Its quite a heavy duty unit but it did get wet which could have caused introduction of small solids. I flushed it with grease but whats done is done.
in neutral that gearbox is turning the shaft slightly which is not a problem but there is no noise unless it is put in gear so it seems to be thrust related. Forward and astern same thing.
A rumble. Quite a loud rumble much noisier than the identically arranged port engine.
This starboard engine has quite a lot of issues generally in the drive line and the engine itself.
Its a not a big problem it all still works but I would like to find out what it is. I hope it is not the gearbox. That would be a bit rude.
I think it is in the line.
I did wonder about the rather interesting solution of replacing the starboard engine with electric drive and a battery bank. Charge the battery using the port engine and a shaft driven alternator.
Also this Ship was clearly meant to be triple screw but was never finished so at some stage I should probably get the third motor installed. It will be made of elastic trickery.
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Post by kris on Feb 19, 2024 19:59:47 GMT
Can’t you use a listening stick, like they do looking for water leaks?
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Post by Aloysius on Feb 19, 2024 20:12:07 GMT
I did wonder about the rather interesting solution of replacing the starboard engine with electric drive and a battery bank. Charge the battery using the port engine and a shaft driven alternator. It's interesting that you say that because I was thinking of fitting wheels to an elephant.
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Post by on Feb 19, 2024 20:16:53 GMT
I had a stethoscope once. That would have been good. The flange bearing does show signs of rusting so I suspect when I previously let the bilge go up it has screwed it. It was very loud when I transited to the inner city ditch and I have not used it since. I don't mind replacing the bearing its only £100 but I just don't fully understand the coupling. It is a funny one. . Those are M6 machine screws. Stainless steel. I am having trouble working out what is going on there. It all works flat out in both forward and astern gear no problems but I can't get my head around it. The bolt heads sit snug against the shaft when done up so they don't come loose. Awkward to undo them and not sure what is in there. A custom made housing with a shear pin is my expectation. I shall have to get these screws out. other side the steel member there is a large flange bearing then a halfshaft going to the gearbox. So removing the bearing has me scratching my head.
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Post by kris on Feb 19, 2024 20:22:57 GMT
I had a stethoscope once. That would have been good. The flange bearing does show signs of rusting so I suspect when I previously let the bilge go up it has screwed it. It was very loud when I transited to the inner city ditch and I have not used it since. I don't mind replacing the bearing its only £100 but I just don't fully understand the coupling. It is a funny one. . A listening stick, stethoscope will tell where the noise is coming from. I would do this before changing anything.
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Post by on Feb 19, 2024 20:24:33 GMT
It is a wise move. This noise did turn up after I flooded the bilge and the bearing got wet.
I suspect rusty balls. In other news I smiled effusively at my girlfriend in the shop at 6.05am this morning and she gave me a look.
I don't know what sort of look it was but it was a little stern.
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Post by Aloysius on Feb 19, 2024 20:28:53 GMT
Listening stick: a long screwdriver, touch one end to the suspected source of noise and your ear t'other.
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Post by kris on Feb 19, 2024 20:30:52 GMT
Listening stick: a long screwdriver, touch one end to the suspected source of noise and your ear t'other. exactly a listening stick. 🙃
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Post by Aloysius on Feb 19, 2024 20:32:00 GMT
Can also be used to drive screws
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Post by on Feb 19, 2024 20:33:15 GMT
It is probably the right plan.
I don't think I have a driver for long screws.
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Post by kris on Feb 19, 2024 20:35:05 GMT
The most misused tool in the tool box.
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Post by Aloysius on Feb 19, 2024 20:35:31 GMT
Screwdrivers work well because they are easier on the ear than, for example, a spike.
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Post by fi on Feb 19, 2024 20:36:00 GMT
It is probably the right plan. I don't think I have a driver for long screws.The woman in the Coop might not appreciate that fact...
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