Re: [Amel Yacht Owners] Bow-Truster overheat

Sv Garulfo

Hi Mohammad and Aty,

So you don't have that 425A fuse on Kokomo?
It'd be interesting to have other data points. 

When we started seeing A54s for sale, someone from the yard in Hyères told us Amel started to fit the emergency disconnect on 54s  after instances of incidents where the bow thruster wouldn't stop. The thermal switch should provide that safety stop, but maybe they felt there should be a manual override too, in case.

By the way, it was in the same sentence as "have the genset running when you use the bow thruster" that raised a few eyebrows in this group a while back. At the time, not knowing better, I took it for granted. Sufficient and safe, yes. Necessary?, I'm not sure. We don't do it anymore as we don't go to marinas that much and when we do, we try to play the game of least-bow-thruster-usage to improve our handling skills, and our batteries can handle the high current discharge.

Fair winds!


On Thu, 28 Jun 2018 at 05:38, 'Mohammad Shirloo' mshirloo@... [amelyachtowners] <amelyachtowners@...> wrote:

Hi Thomas;
Your fuse may have been added on because I've heard some surveyors and insurance companies regard this situation as unsafe and will require the fuse to be added. I'm pretty sure that we were told by Olivier during our survey that the bow thruster is directly connected to the batteries. When I inquired about the reason, I believe the response was that Amel felt that the safety of the boat, when absolutely needing the bow thruster to be operational, was more important than the possibility of the bow thruster being damaged due to overuse.
The emergency disconnect is a manually operated switch which would require intervention form a person to stop current flowing to the bow thruster.
Mohammad and Aty
B&B Kokomo
Amel 54 #099

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Wednesday, June 27, 2018 2:01 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Bow-Truster overheat


Hi Mohammad,

On Garulfo (54-122) there is also a 425A fuse on the positive cable and an emergency disconnect (big red button), both housed in the box inside the forward locker. 

I recently found the emergency disconnect to be rusted frozen so it's on the list for replacement. 

I would encourage others to test the emergency disconnect as it has a carbon steel backing plate and is mounted without any kind of waterproofing so is bound to rust. 

Fair winds,


On Wed, 27 Jun 2018 at 19:27, 'Mohammad Shirloo' mshirloo@... [amelyachtowners] <amelyachtowners@...> wrote:

Hello Reudi;
Yes, the Amel 54 has a thermal cutoff to prevent damage to the thruster as well as continuous high current draw (Around 550 Amps at 24V) which could lead to fire on board. We've had the thermal cutoff kick in  only a couple of times and it has reset in a matter of minutes. We have not timed the exact reset duration.
I'm not aware of any adjustments in the thermal cutoff. The bow thruster has a direct connection to the batteries without a breaker. The thermal cutoff is the only safety items preventing major damage to the thruster and/or wiring.
Try to use the thruster in bursts (less than 15 seconds), as much as possible, so it has time to cool down between usage. We try to over correct a bit when we use use the BT so as the bow falls off, the BT has more time to cool.
Mohammad Shirloo
323-633-2222 Cell
310-644-0908 Fax

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Wednesday, June 27, 2018 9:58 AM
To: amelyachtowners@...

Subject: [Amel Yacht Owners] Bow-Truster overheat


Dear Forum

On my Amel-54 I discovered that the bow truster stops working after repeatingly use within 10-15 min timeframe.

I used the bow truster a bit more than usual when I practiced some manouvers first time; - and on a second occation when I had to manouver in a marina with a lot of windguests of 18+ kn and another chain over my Anker.

It stopped working and after a while (maybe 10 min.) it re-started & operated normaly. I know BT Is not made for constant use, - only few seconds at a time. Then wait and re-use another time.

Question from a beginner:

Does the bow truster has a termic fuse which is activated after some time of usage to save the motor from overheating? 

Does anyone know exactly how it works and if this can be adjusted because I think the BT on Wasabi switches of quite fast. Any ideas or other information?

Best regards


SY Wasabi A54#55

Sailing Cyclades GR.

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