Date   

Re: Batteries with different voltages

svperegrinus@yahoo.com
 

«I cleaned the connection which were nearly black»

I find this interesting.  All of our wires and connectors in the battery box look "new", even though we have owned the boat for nearly five years.  There is no black, dust, mold, nor soot.

Do other people's Amel show aged battery connectors?  If so, how does the aging manifest itself?

Cheerio,


Peregrinus
SM2K N° 350



Re: [Amel Yacht Owners] Batteries with different voltages

eric freedman
 

Hi,

Did you check each battery separately with an electronic battery tester after letting them run under load after charging  for 15 minutes?

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Monday, January 30, 2017 10:46 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Batteries with different voltages

 

 

As Bill said previously, if you have a shorted cell in one of the pair it will be low voltage and because you have 24V across each pair, the not so bad one will rise up in voltage....and its more likely to be the one on the +ve end.

Sounds to me that all the batteries are dead / dying, some worse than others but all on the way out.

I would say that all the batteries should be replaced and also, it seems, the cabling.

Cheers

Alan

Elyse SM437 

 

 



---In amelyachtowners@..., <qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@...> wrote :

Well, I already took out the low voltage ones and just connected the high voltage ones with over 13,2 V - all the same age and the same brand. After two days I had the same effect one of the parallel connected batterie has around 13 voltage and the other one around 10. 

It was not only one pair of batteries with this problem, it was the entire batterie bank. One of the pair with high and one with low voltage. 

 

All the covers of the cables has not any more the original color, the red one looks almost like the black ones. The owner changed 2 years ago one pair of batteries - for sure that was a mistake.

Oliver

SV JoEmi

 


Re: [Amel Yacht Owners] Batteries with different voltages

Alan Leslie
 

As Bill said previously, if you have a shorted cell in one of the pair it will be low voltage and because you have 24V across each pair, the not so bad one will rise up in voltage....and its more likely to be the one on the +ve end.
Sounds to me that all the batteries are dead / dying, some worse than others but all on the way out.
I would say that all the batteries should be replaced and also, it seems, the cabling.
Cheers
Alan
Elyse SM437 

 


---In amelyachtowners@..., <qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@...> wrote :

Well, I already took out the low voltage ones and just connected the high voltage ones with over 13,2 V - all the same age and the same brand. After two days I had the same effect one of the parallel connected batterie has around 13 voltage and the other one around 10. 
It was not only one pair of batteries with this problem, it was the entire batterie bank. One of the pair with high and one with low voltage. 

All the covers of the cables has not any more the original color, the red one looks almost like the black ones. The owner changed 2 years ago one pair of batteries - for sure that was a mistake.

Oliver

SV JoEmi



Re: [Amel Yacht Owners] Batteries with different voltages

Symphony
 

Here are some simple ideas for gaining information before spending money or changing wiring, Oliver

can you do without electricity for a bit, long enough to disconnect the batteries?  then

1) Use a a good Ohm meter to check the resistance in each connecting wire used to parallel and series the batteries

if all the wires from terminal to terminal show 0 resistance then

2) check individual resting voltage of each isolated battery
3) do you have a modern load tester? test the isolated batteries with this instrument.
4) is there anything under the batteries that could provide a hidden ground connection?

This may give you an idea of how to proceed with this unusual problem that does not seem to be Amel-related.

Richard
Tartan 4100 in Connecticut 



From: "qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@... [amelyachtowners]"
To: amelyachtowners@...
Sent: Monday, January 30, 2017 6:06 PM
Subject: Re: [Amel Yacht Owners] Batteries with different voltages

 
Well, I already took out the low voltage ones and just connected the high voltage ones with over 13,2 V - all the same age and the same brand. After two days I had the same effect one of the parallel connected batterie has around 13 voltage and the other one around 10. 
It was not only one pair of batteries with this problem, it was the entire batterie bank. One of the pair with high and one with low voltage. 

All the covers of the cables has not any more the original color, the red one looks almost like the black ones. The owner changed 2 years ago one pair of batteries - for sure that was a mistake.
Oliver
SV JoEmi




Re: [Amel Yacht Owners] Batteries with different voltages

Oliver Buhlert
 

It's random and across the entire battery bank. The batteries are flooded.

All the best 

Oliver
SV JoEmi

Am 30.01.2017 um 13:19 schrieb Alexandre Uster von Baar uster@... [amelyachtowners] <amelyachtowners@...>:

 

Very strange…
Are the batteries becoming low voltage constantly on the same side (i.e. negative) to the house bank or random?
Is that accros the entire battery bank? Or more consistently on the same connection…

Out of curiosity, what type of batteries are you using? Flooded? AGM?

Sincerely, Alexandre

--------------------------------------------
On Mon, 1/30/17, Oliver Buhlert obuhlert@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: Re: [Amel Yacht Owners] Batteries with different voltages
To: amelyachtowners@...
Date: Monday, January 30, 2017, 11:05 AM


 









Hello Alxandre,
thank you for your
answer. Yes I cleaned the connection which were nearly
black. I already put the good batteries together and
disconnect the bad ones, but after two days the same effect,
one batterie with lower and one with normal
voltage.
All the best 

Oliver
Am 30.01.2017 um 12:27 schrieb Alexandre Uster
von Baar uster@...
[amelyachtowners] <amelyachtowners@...>:
















 






Good morning Olivier,



Are your connectors clean?

A few months ago, I also had 1 battery with lower voltage, I
neglected to take it seriously, the result end up cooking 6
out of my 8 house batteries…

If this was to happened again, I would disconnect the bad
batteries and only run with 6 or 4 until you get new ones.


As I don’t want the domino effect to happened again…


Wish I was more help.



Sincerely, Alexandre

SM2K #289 NIKIMAT

Harbor View Marina, Tortola, BVI



--------------------------------------------

On Mon, 1/30/17, qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@...
[amelyachtowners] <amelyachtowners@...>
wrote:



Subject: [Amel Yacht Owners] Batteries with different
voltages

To: amelyachtowners@...

Date: Monday, January 30, 2017, 10:21 AM





 



















Hello,

on our

Amel SM 2000 we have a batterie

problem.The voltges of one of the two parallel

connected batteries get down, that means one has 13,2V
the

other one 10,8. It is the same for all the working

batteries. I already changed the low voltage batteries
and

connected just the high voltage batteries together.
After

two days I had the same effect. One of the parallel

connected batterie has around 13 voltage and the other
one

around 10.I spoke to many people but no one has an

idea how that could be.Looking forward to an

answer.

All the best

OliverSV JoEmi





Re: [Amel Yacht Owners] Batteries with different voltages

qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@...
 

Well, I already took out the low voltage ones and just connected the high voltage ones with over 13,2 V - all the same age and the same brand. After two days I had the same effect one of the parallel connected batterie has around 13 voltage and the other one around 10. 
It was not only one pair of batteries with this problem, it was the entire batterie bank. One of the pair with high and one with low voltage. 

All the covers of the cables has not any more the original color, the red one looks almost like the black ones. The owner changed 2 years ago one pair of batteries - for sure that was a mistake.

Oliver

SV JoEmi



Re: Batteries with different voltages

greatketch@...
 

If one cell in a battery case is shorted internally the voltage will very rapidly drop to ~10.8 Volts after charging (each internal cell generates about 2.1 Volts).

If a battery with an internal short is left in the system, it will rapidly kill the others, and there is a risk of overheating and possible thermal runaway of the batteries during charging.  As has been suggested, running your system without that pair is a good idea until you can get it fixed.

The problem comes with what to do next.  It is a very bad idea to replace PART of a battery bank.  All batteries in a system should be of the same type, brand, and age.  Otherwise they will not charge evenly and the life of all of them will be seriously compromised.  

Bill Kinney
SM#160, Harmonie
Providenciales, Turks and Caicos Islands


Re: [Amel Yacht Owners] Batteries with different voltages

Alexandre Uster von Baar
 

Very strange…
Are the batteries becoming low voltage constantly on the same side (i.e. negative) to the house bank or random?
Is that accros the entire battery bank? Or more consistently on the same connection…

Out of curiosity, what type of batteries are you using? Flooded? AGM?

Sincerely, Alexandre




--------------------------------------------

On Mon, 1/30/17, Oliver Buhlert obuhlert@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: Re: [Amel Yacht Owners] Batteries with different voltages
To: amelyachtowners@...
Date: Monday, January 30, 2017, 11:05 AM


 









Hello Alxandre,
thank you for your
answer. Yes I cleaned the connection which were nearly
black. I already put the good batteries together and
disconnect the bad ones, but after two days the same effect,
one batterie with lower and one with normal
voltage.
All the best 

Oliver
Am 30.01.2017 um 12:27 schrieb Alexandre Uster
von Baar uster@...
[amelyachtowners] <amelyachtowners@...>:
















 






Good morning Olivier,



Are your connectors clean?

A few months ago, I also had 1 battery with lower voltage, I
neglected to take it seriously, the result end up cooking 6
out of my 8 house batteries…

If this was to happened again, I would disconnect the bad
batteries and only run with 6 or 4 until you get new ones.


As I don’t want the domino effect to happened again…


Wish I was more help.



Sincerely, Alexandre

SM2K #289 NIKIMAT

Harbor View Marina, Tortola, BVI



--------------------------------------------

On Mon, 1/30/17, qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@...
[amelyachtowners] <amelyachtowners@...>
wrote:



Subject: [Amel Yacht Owners] Batteries with different
voltages

To: amelyachtowners@...

Date: Monday, January 30, 2017, 10:21 AM





 



















Hello,

on our

Amel SM 2000 we have a batterie

problem.The voltges of one of the two parallel

connected batteries get down, that means one has 13,2V
the

other one 10,8. It is the same for all the working

batteries. I already changed the low voltage batteries
and

connected just the high voltage batteries together.
After

two days I had the same effect. One of the parallel

connected batterie has around 13 voltage and the other
one

around 10.I spoke to many people but no one has an

idea how that could be.Looking forward to an

answer.

All the best

OliverSV JoEmi


Re: [Amel Yacht Owners] Batteries with different voltages

Oliver Buhlert
 

Hello Alxandre,

thank you for your answer. Yes I cleaned the connection which were nearly black. I already put the good batteries together and disconnect the bad ones, but after two days the same effect, one batterie with lower and one with normal voltage.

All the best 

Oliver

Am 30.01.2017 um 12:27 schrieb Alexandre Uster von Baar uster@... [amelyachtowners] <amelyachtowners@...>:

 

Good morning Olivier,

Are your connectors clean?
A few months ago, I also had 1 battery with lower voltage, I neglected to take it seriously, the result end up cooking 6 out of my 8 house batteries…
If this was to happened again, I would disconnect the bad batteries and only run with 6 or 4 until you get new ones.
As I don’t want the domino effect to happened again…
Wish I was more help.

Sincerely, Alexandre
SM2K #289 NIKIMAT
Harbor View Marina, Tortola, BVI

--------------------------------------------
On Mon, 1/30/17, qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: [Amel Yacht Owners] Batteries with different voltages
To: amelyachtowners@...
Date: Monday, January 30, 2017, 10:21 AM


 









Hello,
on our
Amel SM 2000 we have a batterie
problem.The voltges of one of the two parallel
connected batteries get down, that means one has 13,2V the
other one 10,8. It is the same for all the working
batteries. I already changed the low voltage batteries and
connected just the high voltage batteries together. After
two days I had the same effect. One of the parallel
connected batterie has around 13 voltage and the other one
around 10.I spoke to many people but no one has an
idea how that could be.Looking forward to an
answer.
All the best
OliverSV JoEmi




Re: [Amel Yacht Owners] Batteries with different voltages

Alexandre Uster von Baar
 

Good morning Olivier,

Are your connectors clean?
A few months ago, I also had 1 battery with lower voltage, I neglected to take it seriously, the result end up cooking 6 out of my 8 house batteries…
If this was to happened again, I would disconnect the bad batteries and only run with 6 or 4 until you get new ones.
As I don’t want the domino effect to happened again…
Wish I was more help.

Sincerely, Alexandre
SM2K #289 NIKIMAT
Harbor View Marina, Tortola, BVI




--------------------------------------------

On Mon, 1/30/17, qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: [Amel Yacht Owners] Batteries with different voltages
To: amelyachtowners@...
Date: Monday, January 30, 2017, 10:21 AM


 









Hello,
on our
Amel SM 2000 we have a batterie
problem.The voltges of one of the two parallel
connected batteries get down, that means one has 13,2V the
other one 10,8. It is the same for all the working
batteries. I already changed the low voltage batteries and
connected just the high voltage batteries together. After
two days I had the same effect. One of the parallel
connected batterie has around 13 voltage and the other one
around 10.I spoke to many people but no one has an
idea how that could be.Looking forward to an
answer.
All the best
OliverSV JoEmi


Batteries with different voltages

qmvwv3fna4dth3r32bdwtz3bpy7meopg2s2xlnuq@...
 

Hello,


on our Amel SM 2000 we have a batterie problem.

The voltges of one of the two parallel connected batteries get down, that means one has 13,2V the other one 10,8. It is the same for all the working batteries. I already changed the low voltage batteries and connected just the high voltage batteries together. After two days I had the same effect. One of the parallel connected batterie has around 13 voltage and the other one around 10.

I spoke to many people but no one has an idea how that could be.

Looking forward to an answer.


All the best


Oliver

SV JoEmi



Re: [Amel Yacht Owners] watermaker membrane orientation

JEFFREY KRAUS
 


Re: [Amel Yacht Owners] watermaker membrane orientation

Mark Erdos
 

Jeff,

 

Dow (the manufacture of the membranes) says to dispose of any water from the new membranes for ONE HOUR.

 

With best regards,

 

Mark

 

Skipper

Sailing Yacht: Cream Puff

SM2K #275 - Currently cruising: Ft. Lauderdale, FL

 

 

www.creampuff.us

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Sunday, January 29, 2017 1:18 PM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] watermaker membrane orientation

 

 

Mark,

I went ahead and got the membranes installed.

I will mount, and reconnect the unit before the day is out.

My understanding is that the unit should be run with pressure off to wash the storage solution out of the membranes and then the first 10 minutes of made water discarded?

Thanks for the info.

 

Jeff Spirit Amel54 #14




On Sun, Jan 29, 2017 at 12:50 PM, 'Mark Erdos' mcerdos@... [amelyachtowners] wrote:

 

Jeff,

 

The membrane element has an upstream end with a black rubber “V” brine seal in a groove. The element must always move through the tube vessel in the direction of flow, from upstream to downstream. If you look at the shape of the brine seal you will see that it will be damaged if pushed backwards.

 

Install the end plug in the downstream end. Glycerin can be used as a lubricant to help assembly. Do not use any oil based lubricant that may foul the membrane element.

 

You need to run the unit as soon as possible to ensure the membranes are wet. Dryness of the membranes will cause failure

 

 

 

With best regards,

 

Mark

 

Skipper

Sailing Yacht: Cream Puff

SM2K #275 - Currently cruising: Ft. Lauderdale, FL

 

 

www.creampuff.us

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Sunday, January 29, 2017 10:40 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] watermaker membrane orientation

 

 

Greetings Amelians,

Before inserting my new membranes, I want to be 100% certain that they are oriented properly with regards to the O-rings.

The elements removed were orientated as follows:

Red intake tube had the o-ring on the intake end (on the end where the red tape ring on the holding tube was)

Blue outflow tube had the o-ring on the intake end (opposite end from intake tube), which also was on the end where the red tape ring was on the holding tube.

This makes sense as far as the operation of the 2 membranes is concerned.

Once installed, is it necessary to run the unit asap?

 

Jeff Spirit Amel 54 #14 


Re: [Amel Yacht Owners] watermaker membrane orientation

JEFFREY KRAUS
 


FW: [Amel Yacht Owners] watermaker membrane orientation

Mark Erdos
 

Jeff,

 

I mentioned the plug but omitted the question about the membrane. Insert the membrane element into the upstream end so the brine seal also ends up at the upstream end.

 

With best regards,

 

Mark

 

Skipper

Sailing Yacht: Cream Puff

SM2K #275 - Currently cruising: Ft. Lauderdale, FL

 

 

www.creampuff.us

 

From: Mark Erdos [mailto:mcerdos@...]
Sent: Sunday, January 29, 2017 12:50 PM
To: 'amelyachtowners@...'
Subject: RE: [Amel Yacht Owners] watermaker membrane orientation

 

Jeff,

 

The membrane element has an upstream end with a black rubber “V” brine seal in a groove. The element must always move through the tube vessel in the direction of flow, from upstream to downstream. If you look at the shape of the brine seal you will see that it will be damaged if pushed backwards.

 

Install the end plug in the downstream end. Glycerin can be used as a lubricant to help assembly. Do not use any oil based lubricant that may foul the membrane element.

 

You need to run the unit as soon as possible to ensure the membranes are wet. Dryness of the membranes will cause failure

 

 

 

With best regards,

 

Mark

 

Skipper

Sailing Yacht: Cream Puff

SM2K #275 - Currently cruising: Ft. Lauderdale, FL

 

 

www.creampuff.us

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Sunday, January 29, 2017 10:40 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] watermaker membrane orientation

 

 

Greetings Amelians,

Before inserting my new membranes, I want to be 100% certain that they are oriented properly with regards to the O-rings.

The elements removed were orientated as follows:

Red intake tube had the o-ring on the intake end (on the end where the red tape ring on the holding tube was)

Blue outflow tube had the o-ring on the intake end (opposite end from intake tube), which also was on the end where the red tape ring was on the holding tube.

This makes sense as far as the operation of the 2 membranes is concerned.

Once installed, is it necessary to run the unit asap?

 

Jeff Spirit Amel 54 #14 


Re: [Amel Yacht Owners] watermaker membrane orientation

Mark Erdos
 

Jeff,

 

The membrane element has an upstream end with a black rubber “V” brine seal in a groove. The element must always move through the tube vessel in the direction of flow, from upstream to downstream. If you look at the shape of the brine seal you will see that it will be damaged if pushed backwards.

 

Install the end plug in the downstream end. Glycerin can be used as a lubricant to help assembly. Do not use any oil based lubricant that may foul the membrane element.

 

You need to run the unit as soon as possible to ensure the membranes are wet. Dryness of the membranes will cause failure

 

 

 

With best regards,

 

Mark

 

Skipper

Sailing Yacht: Cream Puff

SM2K #275 - Currently cruising: Ft. Lauderdale, FL

 

 

www.creampuff.us

 

From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Sunday, January 29, 2017 10:40 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] watermaker membrane orientation

 

 

Greetings Amelians,

Before inserting my new membranes, I want to be 100% certain that they are oriented properly with regards to the O-rings.

The elements removed were orientated as follows:

Red intake tube had the o-ring on the intake end (on the end where the red tape ring on the holding tube was)

Blue outflow tube had the o-ring on the intake end (opposite end from intake tube), which also was on the end where the red tape ring was on the holding tube.

This makes sense as far as the operation of the 2 membranes is concerned.

Once installed, is it necessary to run the unit asap?

 

Jeff Spirit Amel 54 #14 


watermaker membrane orientation

JEFFREY KRAUS
 

Greetings Amelians,

Before inserting my new membranes, I want to be 100% certain that they are oriented properly with regards to the O-rings.

The elements removed were orientated as follows:

Red intake tube had the o-ring on the intake end (on the end where the red tape ring on the holding tube was)

Blue outflow tube had the o-ring on the intake end (opposite end from intake tube), which also was on the end where the red tape ring was on the holding tube.

This makes sense as far as the operation of the 2 membranes is concerned.

Once installed, is it necessary to run the unit asap?


Jeff Spirit Amel 54 #14 


Re: [Amel Yacht Owners] Re: Steering Wheel Cover

JEFFREY KRAUS
 


Re: Steering Wheel Cover

svperegrinus@yahoo.com
 

We purchased original leather from Amel in La Rochelle, and had a marine leather guy re-do the wheel in Barcelona.

Interestingly enough, the Barcelona guy was of the opinion that the Amel leather is not suitable for wheels, though he agreed that given the bimini and the dodger setup on the boat, this may not be an important issue.

Cheerio,

Peregrinus
SM2K #350
Venice


Re: Replacing Vetus Coupling Bolts

rossirossix4
 

Hi Everyone--
I am following up on the Vetus Coupling related bolt and bushing replacement project.  In the process I received clarification on previous postings, new information on the Amel modified Vetus coupling and other email information--I will try to include this information in this posting.  Hopefully this will be helpful to anyone who needs to service the coupling for a broken bolt that holds the 2 halves of the coupling together and connects the transmission flange to the drive shaft. KAIMI is a 2004 Super Maramu with the Yanmar 4JH-3HTE and ZF-25 but I believe that most of this information pertains to other Super Maramus.

BACKGROUND--I had one of the 4 bolts that hold the Vetus coupling together shear and felt that I had a small amount of vibration.  I obtained some replacement bolts and nyloc nuts that could be used for an emergency repair and operated the engine (albeit at reduced rpm--less than 2000 rpm) until I arrived at location with supporting mechanical and parts services (tied up and plugged in at the Peveza marina).  I dove on my prop to make sure it was clean and that we could have a good test after the repair.

BUSHING INSPECTION OR REPAIR ONLY (no broken bolt)--just remove the nuts from the bolts that hold the Vetus coupler together, then separate the coupler and slip the rubber bushings off to inspect them.  Bushing replacements are inexpensive--$25USD--using Vetus kit K018.  Reassemble.  In my opinion, an inspection is worth doing every 5 years or if you think you have excess vibration.  My bushings were elongated and cracking and probably allowed excessive flexing that broke a bolt. 

PROCEDURE if a bolt has sheared--First, remove the nuts from the remaining bolts.  Then move the engine back--it only needs to go back about 3 inches.  The Yanmar is bolted to the frame with 5 bolts.  The frame is mounted to the fiberglass supports below the engine with the motor mounts.  Because of this design, if the engine is correctly aligned, you can shift the engine back without needing to do a re-alignment adjustment of the engine mounts. It also does not require disassembly or realignment of the C drive.   In order to shift the engine back it is necessary remove the bolts that support the intercooler/grab bar to the frame.  The caliper for the shaft brake also needs to be removed.  Apparently on some SMs there is a crossbar behind the v-belt pulleys that has to be removed, but on our model the support was curved and allowed the engine to be slid back with no problems.  Make sure that exhaust, fuel and electrical connections are not strained when you slide the engine but for us nothing else needed to be loosened or disassembled.

Inspect the engine mounts.  If one is broken then you will need to re-align the engine.  If the Vetus coupling needs to be replaced note that Amel uses a modified Vetus coupling. Our engine mounts and the coupling were fine.

When we shifted the engine back we took some weight off it.  This was achieved by placing a 4x4 timber above the engine between the 2 cockpit benches.  By sliding the timber back to the open hatch it was in a good position to connect a block and tackle to the 2 Yanmar lifting eyes without doing anything to the hatch.  When it came time to slide the engine back we just heaved on it with 2 guys standing in the engine room so it is debatable whether you need to lift the engine from above with that arrangement.  Danny noted using a piece of timber to lever and slide the engine back.

Sliding the engine back parts the 2 halves of the coupling.  The rubber bushings can be removed, inspected and replaced.  The heads of the bolts need to be hack sawed or cut off so that they can be removed.  New bolts should be strong steel like tool quality number 8 steel (NOT Inox) with threads on both ends and 8 matching steel nylocs.  Insert the bolts from the "inside" of the split coupling and screw the front nylok nuts on.  You can hold the bolts with a Channelloc or Vice-Grip using a cloth to protect the threads.  By making the replacement bolts about 9 cm long you are able to make the front nuts flush to the thread end and have an extension to the aft of the bolt that allows you to hold the bolt when tightening front and rear nylocs.  You can see this in the link to the  Dropbox photos.  We also used thread locker to assure that the nuts did not move--about half the threads on a nyloc are metal, so the Loc-tite will help to secure them. Slide the engine back while guiding the bolts through the transmission flange holes and then rebolt the engine and then tighten the remaining 4 nylocs.  By leaving a consistent amount of thread the bolt ends can periodically be visually checked without breaking the loc-tite.

Test the engine under various RPMs and conditions with a good load on the engine and monitor for vibration or noises.  Existing or future vibration or noise could indicate an alignment problem with the engine or C drive, a fouled prop or damaged bushings.  We now carry 4 double ended bolts, 8 nylocs and the Vetus K018 bushing kit as spares.

Dropbox photos include the Vetus K018 "flexible rubber coupling" kit, the old worn, distorted, and cracking rubber, the coupling housing and hub, lifting strap through 2 Yanmar lifting eyes, the engine to frame holes, double ended 9cm replacement bolts, and the reassembled bolts.  


Special thanks to Danny for posting this idea originally and responding to my emails with clarifications.

Bob
SM #429 KAIMI