ianainge
New member
Boat just lifted out , prop gone along with shaft, astern of P bracket, rest of shaft intact, and 2 inch gash in hull on stern. waiting for quote and insurers.
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Disaster struck update!!!!!!!!
- Thread starter ianainge
- Start date
i_sail
Member
what did ya hit??
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PaulF
New member
Bummer! Ian you must have hit something VERY solid to do that. No old railway sleeper surely?
I dont think I have heard of a shaft breaking like that, did somebody say it was a 1 5/8" dia shaft? What horsepower and what reduction gearbox? Were you at full chat at the time?
Good luck with the insurers. Paul
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I dont think I have heard of a shaft breaking like that, did somebody say it was a 1 5/8" dia shaft? What horsepower and what reduction gearbox? Were you at full chat at the time?
Good luck with the insurers. Paul
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mjf
Active member
Ian, That is exactly the same damage as a mate with a Sealine S43 on shafts suffered last year.
The impact pulled back the gearbox too I think.
Bad luck - wonder what was in the water?
Michael
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The impact pulled back the gearbox too I think.
Bad luck - wonder what was in the water?
Michael
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jfm
Well-known member
Eek. you saying the shaft snapped?
Crucial to examine the break face on the shaft. An expert eye can easily say whether it is an old stress crack that finally got too deep and went ping, or whether the shaft was perfectly fine before the break, no stress crack, in which case it must have hit something to break like that.
Where the shafts attach to the gearbox are there no shear plates, ie plastic "weak link" devices that smash beofre anything else? Ours have these. The idea is that the smash first, so protecting the shaft and gearbox.
Hope your insurance covers it - my guess would be that if you hit something then you are covered but if there was already a stress crack then they might resist paying out......
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Crucial to examine the break face on the shaft. An expert eye can easily say whether it is an old stress crack that finally got too deep and went ping, or whether the shaft was perfectly fine before the break, no stress crack, in which case it must have hit something to break like that.
Where the shafts attach to the gearbox are there no shear plates, ie plastic "weak link" devices that smash beofre anything else? Ours have these. The idea is that the smash first, so protecting the shaft and gearbox.
Hope your insurance covers it - my guess would be that if you hit something then you are covered but if there was already a stress crack then they might resist paying out......
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BrendanS
Well-known member
Sheesh! No wonder you felt it! Must have been quite an impact
<hr width=100% size=1>Catapultam habeo. Nisi pecuniam omnem mihi dabris, ad caput tuum saxum immane mittam.
<hr width=100% size=1>Catapultam habeo. Nisi pecuniam omnem mihi dabris, ad caput tuum saxum immane mittam.
D
Deleted User YDKXO
Guest
Yikes!
Looks like break was astern of P bracket which must have acted like hinge with an upward impact such as through grounding although grounding does'nt seem to be cause here. Plastic u/j would only fail if impact was axial as shaft constrained by P bracket and sterngland
IMHO Ian was lucky not to lose boat as P bracket could easily have been ripped off. Feel very sorry for him after all the work he put in for Mercury do. Here's hoping it's an insurance job
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Looks like break was astern of P bracket which must have acted like hinge with an upward impact such as through grounding although grounding does'nt seem to be cause here. Plastic u/j would only fail if impact was axial as shaft constrained by P bracket and sterngland
IMHO Ian was lucky not to lose boat as P bracket could easily have been ripped off. Feel very sorry for him after all the work he put in for Mercury do. Here's hoping it's an insurance job
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Col
New member
Blimey Ian. Hope you get it sorted relatively pain free.
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jfm
Well-known member
Re: Yikes!
Yes, that must be correct mike, the plastic things only work if the impact is axial.
But in ian's case, even if the shaft bust aft of the P bracket, it could have been caused by an axial load. I mean it's not a dead cert that it was a sideways load....
I think the maing thin ian needs is a surveyor to confirm it was an impact job, not a latent defect (stress crack, etc). Then his insurance ought to work (I hope).
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Yes, that must be correct mike, the plastic things only work if the impact is axial.
But in ian's case, even if the shaft bust aft of the P bracket, it could have been caused by an axial load. I mean it's not a dead cert that it was a sideways load....
I think the maing thin ian needs is a surveyor to confirm it was an impact job, not a latent defect (stress crack, etc). Then his insurance ought to work (I hope).
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longjohnsilver
Well-known member
Wow, as jfm has sed it sounds like a stress crack, I cannot imagine a stainless shaft breaking otherwise but I hope for the sake of your insurance we're both wrong.
Hope all is mended and resolved swiftly, at least no one was hurt.
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Hope all is mended and resolved swiftly, at least no one was hurt.
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hlb
RIP
Wot the hell do you know. Yer to busy flogging pentions to alksymered grandmothers to have a clue. He's either clowted sumat hard or more likely not changed his anodes when he should and it's pitted and weakened and errr, fell off. Like mine did once, except it did'nt fall off..../forums/images/icons/smile.gif
<hr width=100% size=1> <font color=blue>If you thought my boat was dirty. You want to meet my girl friend!!
Haydn
<hr width=100% size=1> <font color=blue>If you thought my boat was dirty. You want to meet my girl friend!!
Haydn
longjohnsilver
Well-known member
Aha so you're back from your ditchcrawling bashes, how many boats did you sink?
Anyway who's heard of a stainless shaft pitting where it's not covered buy a bearing. Your shaft didn't break, it was just a case of poor owner maintenance......................../forums/images/icons/smile.gif
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Anyway who's heard of a stainless shaft pitting where it's not covered buy a bearing. Your shaft didn't break, it was just a case of poor owner maintenance......................../forums/images/icons/smile.gif
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hlb
RIP
Well I did not know that prop shafts needed anodes at the time. Particualy cos there wos none there at the time to copy orft. Anyway new prop shafts are easy fer any local bloke with a lath to make. Err like me, well I do have a lathe and I do know a bloke who can. So. Price for new prop shaft. Taking in mind the MARINE word usage. And adding together the pros and cons. I would emagine we could make a pair of shafts for fffffffffpppphhhhh....mumble mumble../forums/images/icons/smile.gif 150 boat tokens each.../forums/images/icons/smile.gif You find the f****** prop!!!
<hr width=100% size=1> <font color=blue>If you thought my boat was dirty. You want to meet my girl friend!!
Haydn
<hr width=100% size=1> <font color=blue>If you thought my boat was dirty. You want to meet my girl friend!!
Haydn
longjohnsilver
Well-known member
Well the shaft anodes are there to protect the props not the shafts, I think............
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Planty
New member
Ian, So sorry to hear your predicament, what is your assumption re the "two inch cash on stern of hull"? Do you suppose this was made when the shaft/prop parted company and flew upwards? Or was this made by whatever you hit, do you think?
Have you any further info on the exact position of the collision and have you contacted CG perhaps to see if anyone else hit anything that day or subsequently and they had made any investigations? Paul
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Have you any further info on the exact position of the collision and have you contacted CG perhaps to see if anyone else hit anything that day or subsequently and they had made any investigations? Paul
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Dave_Snelson
Active member
We would all be interested in...
...what it was you hit?? Not just morbid curiosity, it would add weight to the MBM "Verdict" debate on lost containers in this months MBM.
Assuming your charts said that there were no submerged rocks at that point, then a container would be the most likely suspect. Please don't think my next question stupid but did you happen to note the location? (Not the first thing on your mind when a loud bang happens, I know!).
Finally - I do hope this is resolved quickly and to your satisfaction without too much agg from your insurers. Just by way of reassurance, a chap I know well did substancial "under-the-waterline" damage to the stern of his boat which was repaired via his insureres and you would now never know his boat had ever been damaged.
It will all be OK in the end.
<hr width=100% size=1>Madoc Yacht Club
<A target="_blank" HREF=http://www.madocyachtclub.co.uk>http://www.madocyachtclub.co.uk</A>
...what it was you hit?? Not just morbid curiosity, it would add weight to the MBM "Verdict" debate on lost containers in this months MBM.
Assuming your charts said that there were no submerged rocks at that point, then a container would be the most likely suspect. Please don't think my next question stupid but did you happen to note the location? (Not the first thing on your mind when a loud bang happens, I know!).
Finally - I do hope this is resolved quickly and to your satisfaction without too much agg from your insurers. Just by way of reassurance, a chap I know well did substancial "under-the-waterline" damage to the stern of his boat which was repaired via his insureres and you would now never know his boat had ever been damaged.
It will all be OK in the end.
<hr width=100% size=1>Madoc Yacht Club
<A target="_blank" HREF=http://www.madocyachtclub.co.uk>http://www.madocyachtclub.co.uk</A>
stellican
New member
Heard of this happening to same type of boat twice investigation were inconclusive.
Boat used to be moored in Portsmouth but no longer here
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Boat used to be moored in Portsmouth but no longer here
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stellican
New member
Heard of this happening to same type of boat twice investigation were inconclusive.
Boat used to be moored in Portsmouth but no longer here
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Boat used to be moored in Portsmouth but no longer here
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plombier
New member
Sorry to hear of your probs. Might be worth a call to Solent CG as three weeks ago (Tuesday 20 April) they put out a Navwarn, which I only caught the tail-end of, refering to something in the water in the central Solent area. Could be that you found it.
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andyhythe
New member
Hi Ian, Sorry to hear the sad tale. I have a P360 with 63L's and have not heard of problems like this on other P360's. The shafts on mine are Temet Stainless Steel. Temet is used to because it is more robust than normal Stainless Steel and therefore you can put more HP down a given diameter, ie smaller shaft less weight / cost etc.. If I remember correctly you got your P360 from Port Solent, I hope it's not the one that Sellican is talking about. Just a thought, if someone replaced a Temet shaft with a normal stainless steel, it would not be strong enough to take the HP of your engines. Good luck with the repairs.
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