Date   

Prop is spinning freely

Chris Likins
 

We have A54 #133. Today when sailing I noticed that the prop was spinning freely(in reverse) each time a wave would pass under us. It’s easy to see that the shaft brake is not engaging when the engine is in neutral or shut down. Referencing Bill Rouses book p.305, it reads that the hydraulic shaft OPENS the calipers when pressurized by the transmission. Currently the shaft is retracted into the piston at all times allowing the calipers to remain open. I understand that the calipers are supposed to spring shut on the disk when transmission pressure is lost on the shaft. I am a bit confused by this as there is no mechanical connection between the hydraulic shaft and the outer caliper. It seems like the calipers should close when the shaft is extended.. So my questions are
1. Can someone help explain this system in more detail? 
2. What position should the shaft be in when pressurized and not pressurized? 
3. Is it most likely a bad spring on the caliper? 
4. Most importantly for now.. Is it ok to allow the prop to spin freely for the duration of the passage or would it be better on the shaft if we remain in forward gear. 

Thank you for the help! 


Re: "Apple is examining a chemistry for the car battery called LFP, or lithium iron phosphate, for its car", that will bring the cost down for all of us

Mark McGovern
 
Edited

This will not likely have a trickle down effect for marine batteries anytime soon.  The key differentiator for Apple is the "monocell" cell design, not the LFP chemistry.  It's their way of trying to make up for the lower energy density of the LFP chemistry compared to other Lithium Ion chemistries like the NCA chemistry (lithium-nickel-cobalt-aluminum) that Tesla mainly uses.  Tesla batteries are made from older, proven cylindrical cell design as well as a different NCA chemistry.  Scott, your Victron batteries actually use prismatic LFP cells, not cylindrical cells:  https://shop.pkys.com/Ever-wondered-what-is-inside-a-Victron-Lithium-Battery_b_167.html 

Most other drop-in batteries like Battleborn do use cylindrical LFP cells to make their batteries.

--
Mark McGovern
SM #440 Cara
Deale, MD USA


Re: Placement of Beta 60 in an Amel Maramu #replacement

eric freedman
 

Thank You Danny,

Thank you for the explanation.

 

I am headed off to St Maarten for a new Yanmar  mid January.

 

It is working perfectly and all the fluid samples are great. However with over 7,000 hours, I thought I would just replace it and never have to worry about something going bang on a passage .

I was concerned about the possibility of breaking the oil pump, a wrist pin, or a connecting rod.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

HAPPY New Year

From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Danny and Yvonne SIMMS
Sent: Thursday, December 31, 2020 3:28 PM
To: main@AmelYachtOwners.groups.io
Subject: Re: [AmelYachtOwners] Placement of Beta 60 in an Amel Maramu #replacement

 

Hi Eric, it wasn't an hours issue. What caused its demise was the misunderstanding about rpm. It was maxing at 2800 rpm under load and the consensus on the forum was that there must be something wrong since under no load it would easily do 4000. Many of us tried to resolve what wasn't an issue. So when after about 2 years and 25000 sailing miles suddenly it would rev up to  3500 under load I thought it had resolved whatever was wrong. HOWEVER 2800rpm was the correct max under load and the ability to rev higher was caused by a jammed wastegate on the turbo. This is intended to open progressively to reduce the boost as revs increase.  So with it jammed closed the boost pressure was excessive, hence the higher revs achieved. Not that I ran it at high revs a lot, but over several years the excess pressure damaged the rings and pistons and eventually I couldn't get better than 2200 rpm under load. I tried everything without success including quite a lot of Volvo specialist time. So one day, having had the engineer on board yet again I said b....it and ordered a new one. In retrospect it would have made more sense to do a recondition on the TMD22 since I had replaced most of the bolt ons.

So you TMD owners. 2800 load rpm is correct and if you are getting more, check the waste gate.

Happy New Year to you all

Danny

SM 299

Ocean Pearl

On 31 December 2020 at 17:22 eric freedman <kimberlite@...> wrote:

Hi Danny,

How many hours were on your engine before you replaced it?

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Danny and Yvonne SIMMS
Sent: Wednesday, December 30, 2020 1:00 AM
To: main@AmelYachtOwners.groups.io
Subject: Re: [AmelYachtOwners] Placement of Beta 60 in an Amel Maramu #replacement

 

Hi. The Beta spunds a good option. However I repkced my tmd22 with  volvo d275 and with 1300 hpurs up it is going well. Plus points. It has significantly more torque. Even with the propellor barnacle encrusted it pulls its standard 3000 rpm. Existing gearbox bolted on. Enging mount hole  positioning was identical, fitted perfectly onto the egine bearers. All we had to do was make new forward end spacers to align the engine. Could not have been easier.

It is significantly lighter than the tmd22 and this shows in the fore aft trim. It is a turbo. But no timing belt. It is a push rod engine, not ohc. I did not make up the spacer alignment tool for this job, nor for the engine mout repacement this year. No difficulties at all. Nil vibration.

Regards

Danny

SM 299

Ocean pearl

On 30 December 2020 at 16:35 "michael winand via groups.io" <mfw642000@...> wrote:

The Beta 60 has more torque than the tmd22. The hp is measured at the gearbox output 
I would say that the Beta 60 has the same power as the tmd22 but lower in the rev range. My cruising revs is around 1800 and 6kn  flat out 2200 and 7.5 kn in flat calm water. 30kn wind on the nose would be 4kn 

The cubic capacity makes a difference.  It is nice to have no  turbo  and no timing belt. 

Michael Nebo sm251 

 

 

 

On Wed, 30 Dec 2020 at 1:03 pm, Germain Jean-Pierre

<jp.germain45@...> wrote:

Hello Larry on Sulawesi,

 

Is the Beta 60 sufficient for an SM?  A

2

Curious as I would like a non TC engine when I have to replace my Volvo TDM22.

 

Kind regards,

 

Jean-Pierre Germain, Eleuthera, SM007, NZ

 

 

On 30 Dec 2020, at 14:08, Larry Salibra <larry@...> wrote:

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong

 

 

 


 


 


Re: Placement of Beta 60 in an Amel Maramu #replacement

Danny and Yvonne SIMMS
 

Hi Eric, it wasn't an hours issue. What caused its demise was the misunderstanding about rpm. It was maxing at 2800 rpm under load and the consensus on the forum was that there must be something wrong since under no load it would easily do 4000. Many of us tried to resolve what wasn't an issue. So when after about 2 years and 25000 sailing miles suddenly it would rev up to  3500 under load I thought it had resolved whatever was wrong. HOWEVER 2800rpm was the correct max under load and the ability to rev higher was caused by a jammed wastegate on the turbo. This is intended to open progressively to reduce the boost as revs increase.  So with it jammed closed the boost pressure was excessive, hence the higher revs achieved. Not that I ran it at high revs a lot, but over several years the excess pressure damaged the rings and pistons and eventually I couldn't get better than 2200 rpm under load. I tried everything without success including quite a lot of Volvo specialist time. So one day, having had the engineer on board yet again I said b....it and ordered a new one. In retrospect it would have made more sense to do a recondition on the TMD22 since I had replaced most of the bolt ons.

So you TMD owners. 2800 load rpm is correct and if you are getting more, check the waste gate.

Happy New Year to you all

Danny

SM 299

Ocean Pearl

On 31 December 2020 at 17:22 eric freedman <kimberlite@...> wrote:

Hi Danny,

How many hours were on your engine before you replaced it?

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Danny and Yvonne SIMMS
Sent: Wednesday, December 30, 2020 1:00 AM
To: main@AmelYachtOwners.groups.io
Subject: Re: [AmelYachtOwners] Placement of Beta 60 in an Amel Maramu #replacement

 

Hi. The Beta spunds a good option. However I repkced my tmd22 with  volvo d275 and with 1300 hpurs up it is going well. Plus points. It has significantly more torque. Even with the propellor barnacle encrusted it pulls its standard 3000 rpm. Existing gearbox bolted on. Enging mount hole  positioning was identical, fitted perfectly onto the egine bearers. All we had to do was make new forward end spacers to align the engine. Could not have been easier.

It is significantly lighter than the tmd22 and this shows in the fore aft trim. It is a turbo. But no timing belt. It is a push rod engine, not ohc. I did not make up the spacer alignment tool for this job, nor for the engine mout repacement this year. No difficulties at all. Nil vibration.

Regards

Danny

SM 299

Ocean pearl

On 30 December 2020 at 16:35 "michael winand via groups.io" <mfw642000@...> wrote:

The Beta 60 has more torque than the tmd22. The hp is measured at the gearbox output 
I would say that the Beta 60 has the same power as the tmd22 but lower in the rev range. My cruising revs is around 1800 and 6kn  flat out 2200 and 7.5 kn in flat calm water. 30kn wind on the nose would be 4kn 

The cubic capacity makes a difference.  It is nice to have no  turbo  and no timing belt. 

Michael Nebo sm251 

 

 

 

On Wed, 30 Dec 2020 at 1:03 pm, Germain Jean-Pierre

<jp.germain45@...> wrote:

Hello Larry on Sulawesi,

 

Is the Beta 60 sufficient for an SM?  A

2

Curious as I would like a non TC engine when I have to replace my Volvo TDM22.

 

Kind regards,

 

Jean-Pierre Germain, Eleuthera, SM007, NZ

 



On 30 Dec 2020, at 14:08, Larry Salibra <larry@...> wrote:

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong

 

 



 


 


Re: "Apple is examining a chemistry for the car battery called LFP, or lithium iron phosphate, for its car", that will bring the cost down for all of us

JOHN HAYES
 

And there is research going on at Victoria university in Wellington to build an aluminium lithium battery which should in time bring costs down to ........according to the lead researcher


On 31/12/2020, at 7:39 PM, Jeff Williams <jeff99williams@...> wrote:


Ken,
What brand did you get?
Jeff
S/V Spruzzo SM #379

On Thu, Dec 31, 2020 at 1:12 AM Ken Powers SV Aquarius <ken@...> wrote:
I don't know how the cost could come down too much more...  I got 600AH at 24V for $3600.   The only thing I regret is not getting one more battery so I would have 900AH at 24V.

The price has come down so much that in Thailand it is more expensive to get AGM batteries than LiFePO4.

Ken
Aquarius
SM262


Re: "Apple is examining a chemistry for the car battery called LFP, or lithium iron phosphate, for its car", that will bring the cost down for all of us

Jeff Williams
 

Ken,
What brand did you get?
Jeff
S/V Spruzzo SM #379

On Thu, Dec 31, 2020 at 1:12 AM Ken Powers SV Aquarius <ken@...> wrote:
I don't know how the cost could come down too much more...  I got 600AH at 24V for $3600.   The only thing I regret is not getting one more battery so I would have 900AH at 24V.

The price has come down so much that in Thailand it is more expensive to get AGM batteries than LiFePO4.

Ken
Aquarius
SM262


Re: Placement of Beta 60 in an Amel Maramu #replacement

eric freedman
 

Hi Danny,

How many hours were on your engine before you replaced it?

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Danny and Yvonne SIMMS
Sent: Wednesday, December 30, 2020 1:00 AM
To: main@AmelYachtOwners.groups.io
Subject: Re: [AmelYachtOwners] Placement of Beta 60 in an Amel Maramu #replacement

 

Hi. The Beta spunds a good option. However I repkced my tmd22 with  volvo d275 and with 1300 hpurs up it is going well. Plus points. It has significantly more torque. Even with the propellor barnacle encrusted it pulls its standard 3000 rpm. Existing gearbox bolted on. Enging mount hole  positioning was identical, fitted perfectly onto the egine bearers. All we had to do was make new forward end spacers to align the engine. Could not have been easier.

It is significantly lighter than the tmd22 and this shows in the fore aft trim. It is a turbo. But no timing belt. It is a push rod engine, not ohc. I did not make up the spacer alignment tool for this job, nor for the engine mout repacement this year. No difficulties at all. Nil vibration.

Regards

Danny

SM 299

Ocean pearl

On 30 December 2020 at 16:35 "michael winand via groups.io" <mfw642000@...> wrote:

The Beta 60 has more torque than the tmd22. The hp is measured at the gearbox output 
I would say that the Beta 60 has the same power as the tmd22 but lower in the rev range. My cruising revs is around 1800 and 6kn  flat out 2200 and 7.5 kn in flat calm water. 30kn wind on the nose would be 4kn 

The cubic capacity makes a difference.  It is nice to have no  turbo  and no timing belt. 

Michael Nebo sm251 

 

 

 

On Wed, 30 Dec 2020 at 1:03 pm, Germain Jean-Pierre

<jp.germain45@...> wrote:

Hello Larry on Sulawesi,

 

Is the Beta 60 sufficient for an SM?  A

2

Curious as I would like a non TC engine when I have to replace my Volvo TDM22.

 

Kind regards,

 

Jean-Pierre Germain, Eleuthera, SM007, NZ

 



On 30 Dec 2020, at 14:08, Larry Salibra <larry@...> wrote:

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong

 


Re: Secondary Saltwater Manifold SMs & 54s, and possibly some Santorins, Mangos, and Maramus

Mohammad Shirloo
 

Great work Bill. Thanks for another year of help to keep all Amels functioning  at their best and finding new solutions.

 

Happy holidays and new year to you, Judy, your entire family and the Amel group. Looking forward to a better 2021.

 

Happy Sailing;

 

 

Mohammad and Aty

B&B Kokomo

AMEL 54 #099

 

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of CW Bill Rouse via groups.io
Sent: Wednesday, December 30, 2020 10:54 AM
To: main@AmelYachtOwners.groups.io
Subject: Re: [AmelYachtOwners] Secondary Saltwater Manifold SMs & 54s, and possibly some Santorins, Mangos, and Maramus

 



The company making the above is closed for the Christmas holidays. The above will work in any SM, but will not work for a 54. We are currently designing one for the 54. I will post in this thread when the company in France is ready to take your order for SM and will post here when the 54 design is complete. Thanks for your patience.
--

 

Best,

 

CW Bill Rouse
Amel Owners Yacht School
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970


Re: Fuel Tank Leak

amel46met
 

Hello group I was able to take my tank out through the companion way and replace it with a new tank last year 2019 no furniture removal but awkward with lots of padding
Tom Deasy 1983 Maramu #125


Re: "Apple is examining a chemistry for the car battery called LFP, or lithium iron phosphate, for its car", that will bring the cost down for all of us

Ken Powers SV Aquarius
 

I don't know how the cost could come down too much more...  I got 600AH at 24V for $3600.   The only thing I regret is not getting one more battery so I would have 900AH at 24V.

The price has come down so much that in Thailand it is more expensive to get AGM batteries than LiFePO4.

Ken
Aquarius
SM262


Re: Secondary Saltwater Manifold SMs & 54s, and possibly some Santorins, Mangos, and Maramus

Elja Röllinghoff Balu SM 222
 

Thanks Bill , a good start in 2021 good health for you and your familiy and frinds

Elja
SM Balu





Von meinem iPhone gesendet


Re: Secondary Saltwater Manifold SMs & 54s, and possibly some Santorins, Mangos, and Maramus

Peter Forbes
 

Great start. Thank you.

Peter

Peter Forbes
Carango
La Rochelle
00447836 209730


On 30 Dec 2020, at 18:53, CW Bill Rouse <brouse@...> wrote:


<dummyfile.0.part>


The company making the above is closed for the Christmas holidays. The above will work in any SM, but will not work for a 54. We are currently designing one for the 54. I will post in this thread when the company in France is ready to take your order for SM and will post here when the 54 design is complete. Thanks for your patience.
--
 
Best,
 
CW Bill Rouse
Amel Owners Yacht School
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970


Re: Secondary Saltwater Manifold SMs & 54s, and possibly some Santorins, Mangos, and Maramus

Courtney Gorman
 

Merry Christmas Bill thanks for all your hard work it’s truly appreciated 👍🏻
Have a Very Happy New Year 🎆 


On Dec 30, 2020, at 1:53 PM, CW Bill Rouse <brouse@...> wrote:


<dummyfile.0.part>


The company making the above is closed for the Christmas holidays. The above will work in any SM, but will not work for a 54. We are currently designing one for the 54. I will post in this thread when the company in France is ready to take your order for SM and will post here when the 54 design is complete. Thanks for your patience.
--
 
Best,
 
CW Bill Rouse
Amel Owners Yacht School
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970


Re: Secondary Saltwater Manifold SMs & 54s, and possibly some Santorins, Mangos, and Maramus

 



The company making the above is closed for the Christmas holidays. The above will work in any SM, but will not work for a 54. We are currently designing one for the 54. I will post in this thread when the company in France is ready to take your order for SM and will post here when the 54 design is complete. Thanks for your patience.
--
 
Best,
 
CW Bill Rouse
Amel Owners Yacht School
720 Winnie St
Galveston Island, TX 77550

+1(832) 380-4970


Re: Placement of Beta 60 in an Amel Maramu #replacement

Larry Salibra
 

Hi Jean-Pierre,

Keep in mind I've only used the boat 5-6 times since purchase thanks to Hong Kong's stringent operator licensing regime. When I did the sea trial with a clean hull, I saw similar result to Michael on SM251: wide open throttle gave me about 7.7 knots in flat water @ 2600 rpm. It was running bit hot though. As the propeller started getting growth, she started moving a LOT slower under engine. I hauled out a week or two ago and had a small coral reef growing on the prop and c-drive.

I've just reduced the maxprop propeller pitch from 18 degrees to 16 degrees based on the advice of the engineer that installed the Beta, which will of course reduce my top speed but also reduce load on the engine. Will see how that goes.

More power would always be nice, but it comes at a cost in terms of fuel consumption, weight, engine complexity (turbo!), and money. If I was doing the re-engine myself, I'd seriously look at the Beta 85T that Bill Rouse recommends. That said, I might still end up with the Beta 60 because I find myself leaning towards smaller engines in sailboats. The goal is to sail, not make lots of noise and burn up lots of fuel to push 16,000 kg 1 knot faster.

Larry
SM140 Sula
Hong Kong


Re: Placement of Beta 60 in an Amel Maramu #replacement

Danny and Yvonne SIMMS
 

Hi. The Beta spunds a good option. However I repkced my tmd22 with  volvo d275 and with 1300 hpurs up it is going well. Plus points. It has significantly more torque. Even with the propellor barnacle encrusted it pulls its standard 3000 rpm. Existing gearbox bolted on. Enging mount hole  positioning was identical, fitted perfectly onto the egine bearers. All we had to do was make new forward end spacers to align the engine. Could not have been easier.

It is significantly lighter than the tmd22 and this shows in the fore aft trim. It is a turbo. But no timing belt. It is a push rod engine, not ohc. I did not make up the spacer alignment tool for this job, nor for the engine mout repacement this year. No difficulties at all. Nil vibration.

Regards

Danny

SM 299

Ocean pearl

On 30 December 2020 at 16:35 "michael winand via groups.io" <mfw642000@...> wrote:

The Beta 60 has more torque than the tmd22. The hp is measured at the gearbox output 
I would say that the Beta 60 has the same power as the tmd22 but lower in the rev range. My cruising revs is around 1800 and 6kn  flat out 2200 and 7.5 kn in flat calm water. 30kn wind on the nose would be 4kn 
The cubic capacity makes a difference.  It is nice to have no  turbo  and no timing belt. 
Michael Nebo sm251 

 

On Wed, 30 Dec 2020 at 1:03 pm, Germain Jean-Pierre
<jp.germain45@...> wrote:
Hello Larry on Sulawesi,

Is the Beta 60 sufficient for an SM?  A
2
Curious as I would like a non TC engine when I have to replace my Volvo TDM22.

Kind regards,

Jean-Pierre Germain, Eleuthera, SM007, NZ

 

On 30 Dec 2020, at 14:08, Larry Salibra <larry@...> wrote:

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong
 


Re: Placement of Beta 60 in an Amel Maramu #replacement

michael winand
 

The Beta 60 has more torque than the tmd22. The hp is measured at the gearbox output 
I would say that the Beta 60 has the same power as the tmd22 but lower in the rev range. My cruising revs is around 1800 and 6kn  flat out 2200 and 7.5 kn in flat calm water. 
30kn wind on the nose would be 4kn 
The cubic capacity makes a difference.  It is nice to have no  turbo  and no timing belt. 
Michael Nebo sm251 


On Wed, 30 Dec 2020 at 1:03 pm, Germain Jean-Pierre
<jp.germain45@...> wrote:
Hello Larry on Sulawesi,

Is the Beta 60 sufficient for an SM?  A
2
Curious as I would like a non TC engine when I have to replace my Volvo TDM22.

Kind regards,

Jean-Pierre Germain, Eleuthera, SM007, NZ


On 30 Dec 2020, at 14:08, Larry Salibra <larry@...> wrote:

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong


Re: Placement of Beta 60 in an Amel Maramu #replacement

Germain Jean-Pierre
 

Hello Larry on Sulawesi,

Is the Beta 60 sufficient for an SM?  

Curious as I would like a non TC engine when I have to replace my Volvo TDM22.

Kind regards,

Jean-Pierre Germain, Eleuthera, SM007, NZ


On 30 Dec 2020, at 14:08, Larry Salibra <larry@...> wrote:

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong


Re: Placement of Beta 60 in an Amel Maramu #replacement

Larry Salibra
 

Hi Dirk,

Sula (SM 140) also has a Beta 60 fitted by the previous owner. She has the standard 70 amp 12v insulated return alternator and the 24v 60amp insulated return secondary alternator. No adjustments were made to oil and fuel filters.

Larry
SM140 Sula
Hong Kong


Re: Fuel Tank Leak

James Alton
 

Dennis,

   My tank had what looked like a gooey brownish tar like deposit in the lower part of the tank.  The upper parts of the tank looked pretty clean.  I found that Acetone would cut the deposits so I added some Acetone  (a liter or so) and rocked the tank back and forth.  I then removed the shut off valve and drained as much of the solvent out as possible.  Then working through the shutoff valve hole I swished around a pc. of cloth on the end of a flexible wire to help remove the deposits and soak up the remaining Acetone.  I probably repeated this process at least 10 times at which point the drainage was coming out clean and the inside of the tank that I could see looked shiny so I this method seemed to work pretty well.  I was able to dry out almost all of the Acetone using dry rags poked into the shutoff hole.  Acetone wants to evaporate quite quickly so I just left the fill, vent and shut off valve hole open for a couple of days until the Acetone smell was essentially gone based on the smell test.  I then placed a wet dry vac on the ground well away from the boat and using a long hose drew fresh air through the tank for an hour or so to be really sure that all fumes were removed before the welding.  Recognize that a wet dry vac is an ignition source so if you use this method be sure that essentially all of the fumes are gone and that you place the vacuum well away from anything important just in case!  I was confident that the Acetone was gone at that point but if something bad was going to happen I wanted it to happen away from the boat and not during the welding.

    All of the cracks were located on the forward end of the tank and the tank fits up pretty close to the bulkhead.  I used a dental mirror initially to find the cracks.  In retrospect and given that removal of the tank is really not that hard to do, I think that I could have saved time just moving the tank into the pass thru area so that I could fully inspect the tank directly.  I was actually able to inspect every surface of the tank, even the bottom.  The crack that was seeping was not very obvious,  quite fine.  I will try to attach a photo to this post.  The other cracks that I found were even less obvious.

    The welder was naturally concerned about possible fumes in the tank.  I explained the process I used to clean the tank and then he smelled the fuel fill pipe and was happy with the lack of  fumes.   I spent a few hours going over the whole tank ahead of the welding process, cleaning and polishing areas to locate all of the cracks.  I marked everything that I was able to find.  The welding only took about 2 hours and the tech welded  a lot of spots that we not leaking.  

Best of luck and if you have additional questions that I can help with let me know.

James
SV Sueno
Maramu #220



20190711_094424.jpg



-----Original Message-----
From: Dennis Johns <sbmesasailor@...>
To: main@AmelYachtOwners.groups.io Group Moderators <main@amelyachtowners.groups.io>
Sent: Tue, Dec 29, 2020 12:54 pm
Subject: Re: [AmelYachtOwners] Fuel Tank Leak

Hi James,

Thanks for your response, sorry that you had to resolve this problem before me but glad I have an alternative to cutting through the deck.  Yes, I know the tank fits in the companionway to the aft berth, I've had it out before....Some questions:

1)  Did you do the cleaning yourself or if not what type of person did you hire?
2)  How did you find the crack(s)?  Were they obvious or is there a special method? 
3)  Wasn't the welder concerned about residual fumes?
3)  How long did the process take?

Thanks

Dennis

On Mon, Dec 28, 2020 at 11:01 PM James Alton via groups.io <lokiyawl2=aol.com@groups.io> wrote:
Dennis,

   According to the measurements I took of my seeping fuel tank and from the posts of others that have removed the Maramu fuel tank it is apparently possible to remove the fuel tank with minimal interior removal.  In my case, I found some cracks in the metal/welds on the forward end of the tank,  one of which was seeping.  The only areas where I had cracks were at or close to the welds, the rest of the tank looked excellent.   I drained, flushed and cleaned the tank with solvents.  Vented to remove the solvent fumes.  Then detached the tank and moved it into the center of the pass thru to the aft cabin, letting it sit on a couple wooden blocks an added some lines to keep the tank upright.  The tank is awkward but really not that heavy, maybe 150 pounds?  I was able to move it around in the area of the pass thru by myself with a little ingenuity.  In my case,  moving the tank to the middle of the pass thru  fully exposed the cracks in my tank and they were welded which has so far cured the seeping that I had.  Before reinstalling the tank,  I replaced all of the carpet that the tank was resting on and removed the foam that had absorbed fuel.  I inspected the interior of the tank where possible by the way and found no corrosion inside at all.

Best of luck,

James
SV Sueno
Maramu #220




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-----Original Message-----
From: sbmesasailor via groups.io <sbmesasailor=yahoo.com@groups.io>
To: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io>
Sent: Mon, Dec 28, 2020 9:38 pm
Subject: [AmelYachtOwners] Fuel Tank Leak

Hello Amelians,

My 1982/3 Maramu appears to have sprung a leak in the fuel tank.  This happened once before but it was just the inspection port plate that needed tightening. 

The Maramu appears to have had the deck applied after the tank was installed.  Has anyone had their fuel tank removed for repair?

What are my options?

Thanks in advance.

Dennis Johns
Libertad
Maramu #121 

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