We had an overheat condition on our engine (Yanmar 4JH3-HTE) and the alarm light or buzzer did not sound.  I checked the parts manual and the temperature sensor is a 100 oC sensor.  I noticed the gauge was over 80 but close to 100 oC and quickly anchored and shut down the engine.  

My concern is that the gauge read close to 100 oC and now I'm concerned about the sensor.  The lights and buzzer on the panel test ok.  Is there a way to test the sensor?

Just for background, the boat had been hauled out in Grenada for three months.  When we put the boat back in the water the engine sounded not quite normal and so I was watching the gauges closely.  It turned out that the impeller had shed all of the vanes!  I had checked the water in the exhaust when we first started up and it appeared normal so the impeller must have died after that.  Luckily the vanes were all in the hose between the water pump to the turbocharger cooler.

Duane
Wanderer, SM#477

On Nov 13, 2019, at 4:28 AM, Ryan Meador <ryan.d.meador@...> wrote:



These are used in a few places on our Super Maramu, most notably on the cockpit table.  Amel replaced one for us in Martinique and I'm pretty sure they just called it a "special nut".  Google translates that name as "lentil nut", which is a very apt description.  Thanks for the source!

Ryan and Kelly

SM 233 Iteration

Boston, MA, USA

On Tue, Nov 12, 2019 at 8:09 AM James Alton via Groups.Io <lokiyawl2=aol.com@groups.io> wrote:

Gerhard,

   These same nuts are used all over my Maramu, many thanks for posting a source.  I will add this to my file.

James

SV Sueno

Maramu #220

On Nov 12, 2019, at 6:46 AM, Gerhard Mueller via Groups.Io <carcode@...> wrote:

I don't know if Amel has used these lens-shaped bolt nuts for their other or later boats but I have them found at several places in my Sharki.
After searching for a long time I have found them at this seller and they sell them in small quantities also: See attachment.

--
Gerhard Mueller
Amel Sharki #60
Currently Kalamata, Greece <Linsenmutter-VS8453.PDF>

When Kelly and I first got out SM, we were bothered by this sound, too.  I think I even noted it during the sea trial.  I remember it keeping us up the first night we stayed on the boat.  But shortly thereafter, it went away, and I don't think it was simply that we got used to it -- a few times I've remembered it and listened for it, and I just don't hear it anymore.  My best guess is that when the boat was really empty, it was sitting higher in the water and had lots of space for the sound to reverberate in.  We've now got it loaded up with so much crap it sits lower in the stern.  The aft locker and space beneath the aft berth are jammed with stuff.  I bet that does a lot to dampen the sound.

Ryan and Kelly

SM 233 Iteration

Boston, MA, USA

On Mon, Nov 11, 2019 at 9:11 PM Mohammad Shirloo <mshirloo@...> wrote:

Hi Matt;

 

We’re not on board. Will look through photos to see if I have one to post.

 

Happy Sailing;

 

 

Mohammad and Aty

B&B Kokomo

AMEL 54 #099

 

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of Matt Salatino via Groups.Io
Sent: Monday, November 11, 2019 8:48 AM
To: main@amelyachtowners.groups.io
Subject: Re: [AmelYachtOwners] Wave slap / banging under the stern

 

Mohammed, photos?

~~~⛵️~~~Matt

On Nov 11, 2019, at 10:53 AM, Mohammad Shirloo <mshirloo@...> wrote:

Hello Stefan;

 

After the first season aboard Kokomo about 5 years ago, we started looking for a solution for the “banging” you refer to. After a few iterations of trying different solutions, we came up with our final solution that we affectionately refer to as the “slap slap device”.

 

It basically consists of two layers of mesh fabric (the same material cargo straps are made of), strengthened by 1 inch mesh straps sewed in both directions every 18 inches. The two layers are then sewed together forming several pockets that we have inserted 2 mm waterproof foam for floatation and sound insulation. This is custom made to fit the entire stern from the trailing edge of the rudder to the back of the transom and all the way to the sides about 12 inches above the water line. It has several long straps for attachment to the lifelines/stanchions.

 

We simply deploy from the stern and slip it under the stern from the sides. We just attach four of the straps to the lifelines (just at the forward/rudder end) and let the rest happily float and move up and down with the water movement, under the stern. This provides an insulated barrier between the water line and the hull, where the hull rises out of the water at the stern and the sound originates from.

 

It takes one person about 5 minutes to deploy and retrieve. We simply fold and hang on the life lines, after retrieval, to dry.

 

This will handle almost all conditions that we typically anchor in, where the boat is facing the wind and waves. It does not do as well when larger waves are coming from the stern, but does help to dampen the sound (this is not a common condition). We also deploy her at marinas/harbors where small wavelets are present. As soon as deployed, it transforms the master cabin from a drum machine, into a quiet place to rest and relax. It is on extremely rare occasions that we have to move to the forward cabin due to sound.

 

We have now utilized our slap slap device for 5 seasons in the Med. It has been used in all conditions from 2-3 knot currents to 35-40 knot winds. She is almost like new and should last for a few more years. It has made a huge difference for us, as the master cabin was one of the major selling points of the 54 and we could not imagine, not being to utilize it.

 

 

Happy Sailing;

 

 

Mohammad and Aty

B&B Kokomo

AMEL 54 #099

 

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of Stefan Schaufert via Groups.Io
Sent: Monday, November 11, 2019 5:48 AM
To: main@AmelYachtOwners.groups.io
Subject: [AmelYachtOwners] Wave slap / banging under the stern

 

Hello to all,

today a less technical issue.
Do somebody got a (temporarily) solution against the banging (and often really annyoing) waves under the stern/ owners bed of the AMEL 53/ 54/ 55 - when on anchor?

Best regards
Stefan
A54 119 Lady Charlyette - Porto Santo