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Have I lost the bow thruster prop ?


John Clark
 

Hi Nick,
    sorry for addressing you as Nicole in my last.  Darn spell-check and lack of proofreading...   The "manual" I received with Annie was in French and was mostly an engineering description of the vessel.  I learned how to use the Amel bow thruster service kit from this Amel Owners Forum.   Do a search of "bow thruster" and I am sure you will find written instructions. 

That said,  I am sure Bill Rouse's Amel textbook has a detailed set of instructions on how to drop and retrieve the bow thruster or as Bill himself suggested check out Alex's website for Super Maramu Nikimat.

I hope, and I do expect, that you simply lost the propeller.  It is an easy repair.  Some complaint that the Amel bow thruster is too exposed and prone to damage, perhaps true....but it is also so robustly designed and easy to service that it rarely requires a professional. My SM is 30 years old and is running on her original bow thruster parts...with the obvious exception of the prop.  Change the oil regularly and it will last almost forever.   This is true of almost all Amels of the SM vintage. 
The previous owner of Annie (FMR Vent de Soliel) had her for 16 years and stressed to me that regular greasing was the key to the vessel's health.  After purchase I sailed her for two years all around the Caribbean.  The only issues I had were with parts that were not lubricated so I give a lot of credence to his advice.   Those that failed were for the most part "sealed" so I cannot blame the previous owner.   As recommended in the forum I have since modified some parts(furling gears) to accept grease via zirc fittings, and others I have placed on a maintenance schedule to disassemble and clean regularly...similar to winch maintenance.   

Getting a grasp of the key maintenance items on your vessel will save you a lot of time, headache and money.  Take a few days to get intimate with the forum archives....or invite Bill to France....


Regards,  John

SV Annie SM 37
Brunswick GA....hopefully soon to be at sea again

On Sat, Oct 19, 2019 at 4:52 PM Nicolas Klene via Groups.Io <laixoi=me.com@groups.io> wrote:
Thank you john, i'll look for the replacement kit on board or order it after double checking if the prop is still there...
Is the  replacement procedure documented in the boat manual (with part needed and tools ? )
I'm not on board...
Kindly
Nick
SM471
Port Corbieres
Near Marseille


amelforme
 

Nick, more than likely lost the prop as John has indicated. I might suggest you deeply consider engaging Bill Rouse to take his excellent training course that should be required for all purchasers of ‘new to them’ Amel brokerage sailboats. I have been selling Amel boats since 1981 and Bill’s course is absolutely the best value for the money you spend for the training than anything else you could do on your ‘new to you’ Amel SM 53. Seriously , your learning curve will be enhanced like having owned the boat for more than a year. His book shows all the maintainable systems and how to accomplish repairs to all the serviceable components. There are many other benefits to his program and I am sure that anyone who has taken the course would highly recommend it. No, he is not my Uncle and I get nothing for my recommendation. I urge all my Amel buyers tio take his course and I pay for a forth day of school out of my pocket to encourage them to take the course. You will never regret it. His email address is above in the cc box.

 

Good luck with your Amel!

 

All the Best, Joel     

 

            JOEL F. POTTER-CRUISING YACHT SPECIALIST~L.L.C.

                                           THE  EXPERIENCED AMEL GUY

UNSURPASSED AMEL MARKETING EXPERIENCE AND PRODUCT KNOWLEDGE

                                   Office 954-462-5869  Cell 954-812-2485

 

 

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of Nicolas Klene via Groups.Io
Sent: Saturday, October 19, 2019 3:30 PM
To: main@AmelYachtOwners.groups.io
Subject: [AmelYachtOwners] Have I lost the bow thruster prop ?

 

Hello everybody

Today was my first sea trial to ferry SM471 to it's new home , and before exiting the rather large and peaceful port of "Le Frioul",
I thought I would be a good idea to pratice a few strait  line in reverse using the bow thruster in burst of 6 to 8 sec (rather then 2 or 3 sec ??) when needed.The wind was 15~20 KTS  gusting 30 .
After 20 good minutes of practice ,actionning the bow thruster control was no longer moving the bow ,but we could hear the motor running !!
Any thoughts, short of diving under without a wetsuit ?
Thanks
Nick
SM471


 

Nick,

The Bow thruster Propellor, Delrin (looks like nylon) Hub may be cut through by stainless steel pin.

It is likely that either you or someone before you damaged the hub by reversing the propellor from Port to Starboard without waiting 2 seconds. If this is done repeatedly, the pin will cut through the hub. I have never seen it cut all of the way around, but it is possible.
image.png

If it is NOT the Hub, it is likely the Bow Thruster gears inside the Foot of the bow thruster, or something else. You'll need to remove the Bow Thruster and investigate. Alex on s/v NIKIMAT completed an overhaul and documented it very well here: http://nikimat.com/bow_thruster_overhaul.html
image.png
image.png
--

--
CW Bill Rouse Amel Yacht Owners School
Address: 720 Winnie, Galveston Island, Texas 77550 
   


On Sat, Oct 19, 2019 at 2:42 PM John Clark <john.biohead@...> wrote:
Hi Nicole,
    Sounds like you lost the prop.  Same thing happened to me in St Thomas while turning 180 degrees in a tight marina.  

If you have the bow thruster kit and calm water you can remove the lower unit and replace the prop in about an hour.  Quicker after you figure out how to do it.  I replaced ours at anchor with no hiccups.  Always carry a spare...an Amel spare not the knock off copies.

If the water is clear you should be able to see the prop when it is deployed....

Regards, John

SV Annie SM37
Brunswick GA

On Sat, Oct 19, 2019, 3:30 PM Nicolas Klene via Groups.Io <laixoi=me.com@groups.io> wrote:
Hello everybody

Today was my first sea trial to ferry SM471 to it's new home , and before exiting the rather large and peaceful port of "Le Frioul",
I thought I would be a good idea to pratice a few strait  line in reverse using the bow thruster in burst of 6 to 8 sec (rather then 2 or 3 sec ??) when needed.The wind was 15~20 KTS  gusting 30 .
After 20 good minutes of practice ,actionning the bow thruster control was no longer moving the bow ,but we could hear the motor running !!
Any thoughts, short of diving under without a wetsuit ?
Thanks
Nick
SM471


Germain Jean-Pierre
 

Hi Nick,

Replacing the prop in water is an easy task; best done by a diver.

If you have the Amel spare, it came with a new hub.  Remove the old hub by unscrewing the nylon bolts.  Note the shear is still in good condition...

Replace with now propeller,

NOTE: on our boat we apply rigorously the 2 second rule between toggling P or S.  this ensures the prop is fully stopped before powering in the other direction.  Lost 2 props in the learning days.... no more since “the rule”.

Jean-Pierre Germain, SY Eleuthera, SM007, Fiji.


On 20 Oct 2019, at 08:52, Nicolas Klene via Groups.Io <laixoi@...> wrote:

Thank you john, i'll look for the replacement kit on board or order it after double checking if the prop is still there...
Is the  replacement procedure documented in the boat manual (with part needed and tools ? )
I'm not on board...
Kindly
Nick
SM471
Port Corbieres
Near Marseille


Nicolas Klene
 

Thank you john, i'll look for the replacement kit on board or order it after double checking if the prop is still there...
Is the  replacement procedure documented in the boat manual (with part needed and tools ? )
I'm not on board...
Kindly
Nick
SM471
Port Corbieres
Near Marseille


John Clark
 

Hi Nicole,
    Sounds like you lost the prop.  Same thing happened to me in St Thomas while turning 180 degrees in a tight marina.  

If you have the bow thruster kit and calm water you can remove the lower unit and replace the prop in about an hour.  Quicker after you figure out how to do it.  I replaced ours at anchor with no hiccups.  Always carry a spare...an Amel spare not the knock off copies.

If the water is clear you should be able to see the prop when it is deployed....

Regards, John

SV Annie SM37
Brunswick GA

On Sat, Oct 19, 2019, 3:30 PM Nicolas Klene via Groups.Io <laixoi=me.com@groups.io> wrote:
Hello everybody

Today was my first sea trial to ferry SM471 to it's new home , and before exiting the rather large and peaceful port of "Le Frioul",
I thought I would be a good idea to pratice a few strait  line in reverse using the bow thruster in burst of 6 to 8 sec (rather then 2 or 3 sec ??) when needed.The wind was 15~20 KTS  gusting 30 .
After 20 good minutes of practice ,actionning the bow thruster control was no longer moving the bow ,but we could hear the motor running !!
Any thoughts, short of diving under without a wetsuit ?
Thanks
Nick
SM471


Nicolas Klene
 

Hello everybody

Today was my first sea trial to ferry SM471 to it's new home , and before exiting the rather large and peaceful port of "Le Frioul",
I thought I would be a good idea to pratice a few strait  line in reverse using the bow thruster in burst of 6 to 8 sec (rather then 2 or 3 sec ??) when needed.The wind was 15~20 KTS  gusting 30 .
After 20 good minutes of practice ,actionning the bow thruster control was no longer moving the bow ,but we could hear the motor running !!
Any thoughts, short of diving under without a wetsuit ?
Thanks
Nick
SM471