Re: [Amel Yacht Owners] Re: bow thruster service. Problem


Alexandre Uster von Baar
 

That is strange…. Could your Rigging be at fault?
Gary Silver wrote how to re-rig it, it is in my plan to illustrate what he kindly wrote, but I haven’t had the time yet…
Or as you say, the shaft is no longer round or bent… Didn’t you see anything (visually)?
When you know about the entire bow thruster assembly, please let me (us) know.
Being single handed, I thought of having a spare entire bow thruster assembly, that I could put in quickly.

Sincerely, Alexandre
SM2K #289 NIKIMAT
Club Nautico de San Juan, Puerto Rico




--------------------------------------------

On Sun, 6/26/16, capt.anderson@gmail.com [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:

Subject: [Amel Yacht Owners] Re: bow thruster service. Problem
To: amelyachtowners@yahoogroups.com
Date: Sunday, June 26, 2016, 1:55 PM


 











Thank you everyone
for your comments and interest. Here is
my bowthruster in-the-water re-installation report: There
was a little green slimy
growth inside the trunk which I had my diver clean. It
wasn’t bad and was not
enough to be a problem. No barnacles or crustations. Upon
re-installation (with
a diver standing by) the shaft jammed at the same place it
did on the way down,
which is with about 4” of shaft above the interior seal.
It was not possible to
pull up hard enough to pull the shaft further up. 
All it took was a gentle push from the diver
below to overcome the resistance and it came up. 
The thruster now operates fine however when
retracting, at that exact 4” spot you can hear the
retraction motor load up slightly
for less than one second and you can see an ever-so-slight
pause or “hiccup” in
the upward movement of the shaft.  During
extension the shaft hangs up in the same place on the way
down but it is more
pronounced. The extension/retraction motor doesn’t load up
because the heavy
weight of the bowthruster motor is enough to overcome the
resistance. (I made a
0:27 low-resolution/small file size video but cannot easily
figure out how to
upload it here. I will if I can figure out ho to.) 
My best guess is that
the shaft is out-of-round at the point where it hangs up.
For the time being my
plan is to only service the bowthruster when the boat is out
of the water, and
at that time to see if a machine shop can precisely measure
the top of the
shaft and mill it back to the correct specification then. I
will also first
consult with Amel and ask for their suggestions and (ugh!)
get a quote for an
entire new bowthruster trunk assembly. And, I’m open to
suggestions!  Since I’m casting off tomorrow
for Alaska I
will operate as is for now. All the Best to the Group &
thanks for your
input,

Jim

SM384 Sirena Azul

Seattle









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