Re: [Amel Yacht Owners] Bowthruster propeller shaft seal on SM


Bill & Judy Rouse <yahoogroups@...>
 

Alex,

I know that you know this, but you did not mention the stainless steel pin that goes through the hub.

If that pin was inserted through the Delrin® hub and thruster shaft before the propeller was screwed to the hub, what happened to the pin??? 

You said that you found "both propeller with the 6 nylon bol(t) still attached to it." If the nylon bolts were attached to the propeller, they had to still be screwed into the hub, or else, the bolts would fall out...right?

I am confused.

Alex & Paul,
I wonder if there are some out-of-spec hubs being made and distributed? Do you know the origin of your hub. I seem to remember that one owner had some hubs machined out of Nylon rather than Delrin® and they fell apart rapidly.

Bill

Bill
BeBe 387

On Mon, Mar 21, 2016 at 12:46 PM, Alexandre Uster von Baar uster@... [amelyachtowners] <amelyachtowners@...> wrote:
 

Good morning Paul,

I haven’t posted the detail on the forum yet, but I found both propeller with the 6 nylon bold still attached to it… there was also nothing in the water to cause the failure.
To me it looks like the thread on the hubs holding the nylon bold failed…
Since I used that same hub and propeller, I don’t think it is a production issue, but rather an age/ware issue (of the hub).
By the center part of the propeller burst into pieces, do you mean the propeller itself? Or (what I call) the hub on which the nylon screws are bolt on?
Sincerely, Alexandre

--------------------------------------------
On Mon, 3/21/16, osterberg.paul.l@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: Re: [Amel Yacht Owners] Bowthruster propeller shaft seal on SM
To: amelyachtowners@...
Date: Monday, March 21, 2016, 4:55 AM


 









Hello!AlexandreI also lost my
bow-thruster propeller after overhauling the whole thruster
with new bearings and lip seal.When in the water
I used it less than 5 seconds and suddenly the revs went up
on the motor. There was nothing in the water to get into the
propellar so I do not know the cause. When taken out the
thurster shaft I found no propellar, but the center piece
with still three of the nylon screws on. Strange that means
that the whole center of the propellar that should be the
most massive part has burst into pieces. Can it be a miss in
the production?Paul on S/Y Kerpa










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