2 diferent types of foam seals used on the bow thruster

Judy and Bill aboard SV BeBe <yahoogroups@...>


A close examination of the seals should prove that 1 of the 3 is different. This is the one that goes inside the boat.

The following I copied from BOW THRUSTER SERVICE by Gary Silver.pdf which you can download on the Amel Owners website under Files >> Miscellaneous

Portion Copied follows:
Remove the inside foam seal and the two foam seals adhered to the
top of the rectangular anti-torque cap of the bow thruster. (These are held in place by contact cement) Note added by BeBe: the 1 "inside foam seal" is different from the "two foam seals." Examine the new foam seals carefully and you will see the difference. The two like foam seals go together outside and on top of the rectangular anti-torque cap.

8. To replace the trunk lip seal, remove the two screws and retaining
washers from the top of the bow thruster trunk. Use a screwdriver to
collapse this seal or try carefully prying it out. It is a very loose fit.
a. When installing the new lip seal, pack it with grease, press it into its recess using RTV to seal it and hold it. Replace the retaining screws and washers.
9. To remove the prop shaft lip seal you may need a slide hammer and very tiny screws. It is difficult to drill into this seal without the drill slipping off and damaging the fiberglass recess, so use a 1/16th inch drill and drill really slowly to avoid slipping off. Once two screws are threaded into this seal a slide hammer easily removes it.
10. Seal this new seal into place with RTV as well. It is a tighter fit than the upper seal but still relatively loose compared to the main prop shaft seal.
<<<Added May 2012>>>
"With the (bow thruster prop shaft) seal pushed in further now not even a hint of oil moisture coming through after 2.5 hrs with only the correct SAE90 gear oil in.

Note from: Colin Streeter Island Pearl II - SM2k #332 "What we did is carefully but pretty firmly pressed the new seal in (with the flat edge of a file) so that it has gone about 3mm beyond level with the outer edge. In this position it cannot go any further in and it now has a perfect seal."

Hope this helps,

BeBe, SM2k, #387

--- In amelyachtowners@yahoogroups.com, Ian Shepherd <sv_freespirit@...> wrote:

Thanks Bill,

it worked this time, but no mention is made as to which type of foam
seal goes where assuming my spares kit has two types, which I believe it
does, nor which way up the tube lip seal should go. As I am in Larnaca
it is hard to envisage whether it really matters, but I will be at the
boat tomorrow.



On 18/07/2012 15:44, Judy and Bill aboard SV BeBe wrote:


Go to the website for Amel Owners Group. Be sure to sign-in to your
Yahoo account (probably the reason it did not work for you earlier).
Go to Files >>> Miscellaneous >>> BOW THRUSTER SERVICE by Gary Silver.pdf

That should do you.

BeBe, SM2k, #387

--- In amelyachtowners@yahoogroups.com
<mailto:amelyachtowners%40yahoogroups.com>, Ian Shepherd
<sv_freespirit@> wrote:


thanks for the info but I am afraid the link does not work. I will be
back at KGM Saturday as currentlt in the UK picking up a spare SSB as
the installed one has developed a fault.


Ian SM414 Crusader

On 18/07/2012 06:12, Judy and Bill aboard SV BeBe wrote:


Yes, there are two different types of foam seals used on the bow
thruster. When I discovered this a few years ago, I re-wrote the BOW
THRUSTER SERVICE by Gary Silver.pdf which was originally written by
you and Gary and posted it in the files section of the Amel website.
Someone moved it to the Miscellaneous folder and it is currently at:

Amel told me that if you get the seals mixed up, you will get some
water in through the bow thruster. I believe that you can also get
some water by getting the torque on the lifting cable too tight or
lose. I know that some owners do not use the safety pin, but rather
change the lifting cable adjustment to place more pressure on the
seals when the Bow Thruster is UP. This adjustment changes the seal
when the Bow Thruster is DOWN. And in my opinion, when it is down and
in use you will get water inside if you have the wrong seal, or if
have incorrectly adjusted the lifting cable.

This is 80% opinion and 20% experience, so please take it as that.

Hope this helps.

BeBe, SM2k, #387

--- In amelyachtowners@yahoogroups.com
<mailto:amelyachtowners%40yahoogroups.com>, Sailormon <kimberlite@>

there are 2 diferent types of foam seals used on the bow thruster.

Dear Eric,

To help you with the foam seals, I have attached a drawing of the
bowthruster showing where they are located. Indeed the neoprene
seals are
located outside the hull and the natural seal sits inside the boat.
tell me how many of each I should put in the shipment.

Thank you.

Best regards,

Maud/Chantiers AMEL Customer service


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