Date   

Re: Installing a holding tank Amel Maramu

Sarah & Trevor McIlwaine
 

Hi James,

Ahhh, no the boat is in the UK & we're currently in Portugal.  

Can I ask if it was timely, costly, and/or involved ripping the boat apart?  

We're heading back to the UK & will be living on board, so wondering how much of a headache it would be.

Thanks,

Sarah 

Sea Love, Hull 161

On Mon, 11 Jan 2021, 17:30 James Watkins via groups.io, <ewatk49734=yahoo.com@groups.io> wrote:

I have Maramu hull 185 and while there was no holding tank in the forward head there was one in the aft head.  I had it done by a knowledgeable Amel person and can recommend hs contact.  I assume you are in the US?  

 

Best Regards

Jim Watkins

Owner Act II Maramu hull 185

 

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of Sarah & Trevor McIlwaine
Sent: Monday, January 11, 2021 6:18 PM
To: main@amelyachtowners.groups.io
Subject: [AmelYachtOwners] Installing a holding tank Amel Maramu

 

Hi everyone,

 

We're in the process of buying a 1985 Amel Maramu & were surprised to find there is no holding tank on it. 

 

Has anyone installed one in a Maramu? Did you do it yourselves or get a professional?  We're looking at costs, in the water or (I'm presuming it needs to be done whilst out of the water for a through hull)?

 

Any information or advice would be appreciated.

 

Thanks in advance,

 

Sarah & Trev 

Sea Love, Hull 161


Re: Heater

Karen Smith
 

Paul,

Our boat came to us equipped with reverse cycle air conditioning units.  They work well keeping the boat comfortable down to about 0C. Something to be aware of with this kind of unit, it that it does not work when the water temperatures drop below about 5C.  They are quite energy efficient, actually using a bit less power than they do when cooling.  They each deliver about 2,000 Watts of heat while using a bit less than 900 Watts of electricity.

Amel also equipped our boat with resistance heaters, one in each cabin.  They draw a lot of power, if they were all running about 20 Amps, more than the shore power connection could support.

Bill Kinney
SM160, Harmonie
The boat is in Charleston, we are finishing up a delivery job in Jolly Harbor, Antigua


Re: Installing a holding tank Amel Maramu

Dennis Johns
 

Hello Sarah & Trevor,

I have a 35 gallon holding tank installed in the port/aft cockpit lazarette (pretty sure you'll need to get it custom made).  Here are a couple of hints:
1)  I have runs from the forward and aft heads done in PVC.  Using a few 22 degree fittings, it is not too difficult to make the runs and you will never need to replace the very expensive "sanitary" hose when the stink becomes too much.  While you are at it, I suggest you run PVC in the anti-siphon loop as well.  These two actions will keep your heads and saloon from becoming an embarrassment.
2)  If you can heel the boat over in a slip (mast halyard to a cleat), the thru hull can be installed just above the water line.
3)  Be sure to install the macerator at the level of the drain.  Don't make the macerator draw the waste up from the bottom of the tank as it will quit on you before its time and replacing it is not fun if you aren't near a clean out station (ask me how I know this).
4)  Don't be cheap on the deck clean out cap.  The plastic cap will be exposed to UV rays for long periods of time and eventually will degrade to the point where you have to break it to do a clean out.

Good Luck

Dennis Johns
Libertad
Maramu #121

On Mon, Jan 11, 2021 at 9:18 AM Sarah & Trevor McIlwaine <Ourbigboatyadventure@...> wrote:
Hi everyone,

We're in the process of buying a 1985 Amel Maramu & were surprised to find there is no holding tank on it. 

Has anyone installed one in a Maramu? Did you do it yourselves or get a professional?  We're looking at costs, in the water or (I'm presuming it needs to be done whilst out of the water for a through hull)?

Any information or advice would be appreciated.

Thanks in advance,

Sarah & Trev 
Sea Love, Hull 161


Re: Headsail roller furling replacement motors

 

Rod,

You may want to take the current motor to this place in Antigua:
image.png

Bill
CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Sun, Jan 10, 2021 at 2:40 PM Rod Glassford <rod@...> wrote:
Hello all Amel owners! I’m new to the site, and too our Amel . We own a 1986 Amel Maramu and need too get a replacement (spare) headsail furling motor. Does anyone know what is available?
cheers,
Rod


Re: Onan group on SM number 32

 

Juan,

Also, Bill Kinney may still be there in Jolly Harbour aboard an Amel Super Maramu RASCAL. Bill Kinney may be able to help you before he leaves. +1415-488-6755 greatketch@.... Bill will be the best person with the most experience. If Bill & Karen have left, David Walter in my previous email.

Bill
CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Mon, Jan 11, 2021 at 11:25 AM Bill Rouse <brouse@...> wrote:
Juan,

Contact David Walter in Jolly Harbour:
image.png


CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Mon, Jan 11, 2021 at 6:42 AM Juan de Zulueta <jdezulue@...> wrote:
Bill,

I have indeed an infrared medical thermometer. I will use it to check.
I was as well wondering if my problem could come from the thermostat?
I am currently in Antigua do yo know if there is a Onan dealer selling spare parts in Antigua ? I did not find any on the website of Cummins Onan.

Juan de Zulueta
+33680895892
sent from my Ipad.

Le 10 janv. 2021 à 19:17, CW Bill Rouse <brouse@...> a écrit :


Juan,

You should have something like this. It will help you with many things:
<image.png>


If you have a meat thermometer, it can work. Something like this:
<image.png>

CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Sun, Jan 10, 2021 at 4:39 PM Juan de Zulueta <jdezulue@...> wrote:
Bill, I changed the impeller but I did not check temperature of the oil neither of the exhaust
i am not sure what type of thermometer I can use .
I checked coolant level , see water temp, coolant temp in the hoses before and after heat exchanger but only by hand and not using thermometer
 


thanks again for your answer


Re: Installing a holding tank Amel Maramu

James Watkins
 

I have Maramu hull 185 and while there was no holding tank in the forward head there was one in the aft head.  I had it done by a knowledgeable Amel person and can recommend hs contact.  I assume you are in the US?  

 

Best Regards

Jim Watkins

Owner Act II Maramu hull 185

 

From: main@AmelYachtOwners.groups.io <main@AmelYachtOwners.groups.io> On Behalf Of Sarah & Trevor McIlwaine
Sent: Monday, January 11, 2021 6:18 PM
To: main@amelyachtowners.groups.io
Subject: [AmelYachtOwners] Installing a holding tank Amel Maramu

 

Hi everyone,

 

We're in the process of buying a 1985 Amel Maramu & were surprised to find there is no holding tank on it. 

 

Has anyone installed one in a Maramu? Did you do it yourselves or get a professional?  We're looking at costs, in the water or (I'm presuming it needs to be done whilst out of the water for a through hull)?

 

Any information or advice would be appreciated.

 

Thanks in advance,

 

Sarah & Trev 

Sea Love, Hull 161


Re: Onan group on SM number 32

 

Juan,

Contact David Walter in Jolly Harbour:
image.png


CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Mon, Jan 11, 2021 at 6:42 AM Juan de Zulueta <jdezulue@...> wrote:
Bill,

I have indeed an infrared medical thermometer. I will use it to check.
I was as well wondering if my problem could come from the thermostat?
I am currently in Antigua do yo know if there is a Onan dealer selling spare parts in Antigua ? I did not find any on the website of Cummins Onan.

Juan de Zulueta
+33680895892
sent from my Ipad.

Le 10 janv. 2021 à 19:17, CW Bill Rouse <brouse@...> a écrit :


Juan,

You should have something like this. It will help you with many things:
<image.png>


If you have a meat thermometer, it can work. Something like this:
<image.png>

CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Sun, Jan 10, 2021 at 4:39 PM Juan de Zulueta <jdezulue@...> wrote:
Bill, I changed the impeller but I did not check temperature of the oil neither of the exhaust
i am not sure what type of thermometer I can use .
I checked coolant level , see water temp, coolant temp in the hoses before and after heat exchanger but only by hand and not using thermometer
 


thanks again for your answer


Installing a holding tank Amel Maramu

Sarah & Trevor McIlwaine
 

Hi everyone,

We're in the process of buying a 1985 Amel Maramu & were surprised to find there is no holding tank on it. 

Has anyone installed one in a Maramu? Did you do it yourselves or get a professional?  We're looking at costs, in the water or (I'm presuming it needs to be done whilst out of the water for a through hull)?

Any information or advice would be appreciated.

Thanks in advance,

Sarah & Trev 
Sea Love, Hull 161


Re: Prop is spinning freely

Juan de Zulueta
 

Dear Kent,

I have changed my engine for a yanmar 4jh4hte 6 years ago. Since my Super Maramu was built in 1990, It had the old transmission installed on it. Amel recommandation was to change the transmission to the new one more robust. My engine has now 1800 hours, since we have a mechanical transmission we don t need the brake.
Amel told me at that time that if I had the new transmission installed there was no need to change it.
Since your super Maramu is number 243 I believe you should have the new version installed on your boat.

Juan de Zulueta
Super Maramu 32
Ophélie X

Envoyé de mon iPhone

Le 11 janv. 2021 à 11:59, karkauai via groups.io <karkauai@...> a écrit :


Bill K,
Thank you for this clear explanation of the Hurth/ZF transmissions. I haven't read this anywhere before and have never understood why my helm has a sign that says in French, not to put in reverse while sailing. When I switched from AutoProp to be MaxProp, I read that I should put in reverse until it stopped turning, then back to neutral. I have just finished a maintenance of the Autoprop and reinstalled it to see how it performs compared to the MaxProp.  I now know that if it turns while sailing, it is safe to put the transmission in forward, but not reverse.

Now for the next question...
When I repowered from Volvo TMD22 (78HP} to Yanmar 4JH4HTE, (110HP), I was assured by the Yanmar dealer and mechanic (Danny Ramos in Fajardo; top Volvo mechanic in the Caribbean at the time) that the existing transmission was ok to reuse.  It has had no problems after ~1200 hours using the MaxProp.  But now I am worried that it may not be quite up to the job.  Does anyone have thoughts or recommendations about that? 

Should I just replace it with a new, more
robust one? If I use the Z25F, that means adding a shaft brake, right? Are there other robust mechanical transmissions that wouldn't require the brake? Any downsides to that?

Or have the transmission inspected, and put it back in if everything looks OK?

Or, with 1200hours already on the transmission with the new engine, just assume it is Ok and leave it alone?

Thanks again Bill K, your post is a game-changer for me!

Happy New Year, everyone!
Kent & Iris
Kristy
SM 243





--
Kent & Iris
KRISTY
SM243


Re: Eumenia Mini 5500 Dishwasher Parts

Mark Erdos
 

Hi Kenneth,

 

Please be sure to post your findings. Our evacuation pump causes the breaker to pop. Otherwise, the dishwasher still works. I would like to get this operational again since we used it often while on anchor.

 

 

With best regards,

 

Mark

 

Skipper

Sailing Vessel - Cream Puff - SM2K - #275

Currently cruising - Tahiti, French Polynesia

www.creampuff.us

 

From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Ken Powers SV Aquarius
Sent: Sunday, January 10, 2021 7:50 PM
To: main@AmelYachtOwners.groups.io
Subject: [AmelYachtOwners] Eumenia Mini 5500 Dishwasher Parts

 

All,

I have a Eumenia Mini 5500 Dishwasher, and would like keep Aquarius stock.  But, need to get spare parts for the dishwasher.  I have emailed ersatzteile@schabauer-service dot at , but have not received a response.  The evacuation pump is out, and might try to find a replacement which is similar if I can not get the exact replacement.

Any thoughts on what I should do.

Thanks!

Kenneth Powers
Aquarius sm2k262


Re: Prop is spinning freely

karkauai
 

Bill K,
Thank you for this clear explanation of the Hurth/ZF transmissions. I haven't read this anywhere before and have never understood why my helm has a sign that says in French, not to put in reverse while sailing. When I switched from AutoProp to be MaxProp, I read that I should put in reverse until it stopped turning, then back to neutral. I have just finished a maintenance of the Autoprop and reinstalled it to see how it performs compared to the MaxProp.  I now know that if it turns while sailing, it is safe to put the transmission in forward, but not reverse.

Now for the next question...
When I repowered from Volvo TMD22 (78HP} to Yanmar 4JH4HTE, (110HP), I was assured by the Yanmar dealer and mechanic (Danny Ramos in Fajardo; top Volvo mechanic in the Caribbean at the time) that the existing transmission was ok to reuse.  It has had no problems after ~1200 hours using the MaxProp.  But now I am worried that it may not be quite up to the job.  Does anyone have thoughts or recommendations about that? 

Should I just replace it with a new, more
robust one? If I use the Z25F, that means adding a shaft brake, right? Are there other robust mechanical transmissions that wouldn't require the brake? Any downsides to that?

Or have the transmission inspected, and put it back in if everything looks OK?

Or, with 1200hours already on the transmission with the new engine, just assume it is Ok and leave it alone?

Thanks again Bill K, your post is a game-changer for me!

Happy New Year, everyone!
Kent & Iris
Kristy
SM 243





--
Kent & Iris
KRISTY
SM243


Standing rigging

Bernd Spanner
 

Dear All,

please share your opinion and if available views from a professional stand point, eg. metallurgy, material fatigue, etc about standing rigging when experienced in this field.
There are so many opinions around like changing after 7 years, contracting a surveyor, does not need to be changed on high quality yachts like AMEL, HR, etc.
--
Bernd
SN 119 / Cascais, Portugal


Re: Onan group on SM number 32

Juan de Zulueta
 

Bill,
 
I did checked the temperature of the exhaust elbow and oil filter :
exhaust elbow temp is 41,5 C
oil filter 79,5 C

these seems OK according to your rec.
any other idea ? Could this come from the water temp switch shutoff S2 ?

best regards


Re: Onan group on SM number 32

Juan de Zulueta
 

Bill,

I have indeed an infrared medical thermometer. I will use it to check.
I was as well wondering if my problem could come from the thermostat?
I am currently in Antigua do yo know if there is a Onan dealer selling spare parts in Antigua ? I did not find any on the website of Cummins Onan.

Juan de Zulueta
+33680895892
sent from my Ipad.

Le 10 janv. 2021 à 19:17, CW Bill Rouse <brouse@...> a écrit :


Juan,

You should have something like this. It will help you with many things:
<image.png>


If you have a meat thermometer, it can work. Something like this:
<image.png>

CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar


On Sun, Jan 10, 2021 at 4:39 PM Juan de Zulueta <jdezulue@...> wrote:
Bill, I changed the impeller but I did not check temperature of the oil neither of the exhaust
i am not sure what type of thermometer I can use .
I checked coolant level , see water temp, coolant temp in the hoses before and after heat exchanger but only by hand and not using thermometer
 


thanks again for your answer


Re: Prop is spinning freely

Beaute Olivier
 

Hello Bill,

all you wrote is correct.
There has been some SM2000 with VOLVO engine and ZF25 hydraulic gear-box, with the same shaft-brake system as on the YANMAR engine.
Some of these SM2000 are fitted with a prop shaft alternator which requires a solenoid valve system in order to keep the prop spinning while the engine is OFF. When in use, the solenoid valve keeps the pressure in the shaft-brake cylinder.

Happy New Year.

Olivier.

On Monday, January 11, 2021, 10:12:40 AM GMT+1, Danny and Yvonne SIMMS <simms@...> wrote:


A great reply Bill. Best explanation Ive seen. However I am going to drop a curly one here. I have a Volvo and a ZF 25M gearbox and an auto prop.For reasons I have not discovered it will sometimes lock in reverse, sometimes in forward. I have to observe the shaft spinning and engage one or the other. The correct selection will exhibit a satisfying clunk and the shaft stops dead. The wrong results in a soggy almost stop, in which case obviously I change to the other. It is random, so I just take care and always check.

Kind regards and wishing you all the best for the new year.

Danny

SM 299

Ocean Pearl

On 11 January 2021 at 14:18 "Karen Smith via groups.io" <karenharmonie@...> wrote:

Mark,

I think you are mixing up the ZF25M transmission and the ZF25. The document you reference is for a ZF25M, not the ZF25.  This has been a common source of confusion on the forum, since both of these are the common transmissions used in many Amel boats. The similar model numbers for two very different machines has always been an issue.

This is my understanding of this un-necessarily complicated issue:

The ZF25M is a smaller, lower horsepower rated, transmission that shifts mechanically. I believe none of these transmissions were ever fitted with a shaft brake, because none was needed.  The ZF25, even though it has a very similar part number, is a very different beast.  I doubt the ZF25M and the ZF25 have any parts in common.  The ZF25 is a higher horsepower rated, hydraulically shifted, transmission.  As far as I know (and this might not be correct) the Volvo TMD22 engines all had ZF25M and the Yanmars all had ZF25.  Note that these model numbers changed when the original Hurth brand was bought out by ZF.

As the document you quoted points out, the ZF25M can free-wheel without damage, other than routine wear on bearings and seals. With a normal fixed prop or a MaxProp, putting it in reverse will lock the rotation.  The AutoProp is a different story.  It rotates in the opposite direction when free-wheeling, and needs to be put in FORWARD to lock it.  The rule for operation should be “Do not allow the transmission to free wheel while in gear—ever.”  If the prop rotates while in reverse, put it in forward.  And the other way round.

The ZF25 relies on the hydraulic pressure generated by the rotating input shaft (from the engine) to shift.  If the engine is not turning, it will always be in neutral, and neither forward nor reverse can be engaged no matter what the position of the shift lever.  Therefore, the prop will always spin when the engine is not running.  Most hydraulic transmissions require the engine input shaft to be turning to pump the fluid internally to lubricate the moving parts. The ZF25, however, is allowed to rotate with the engine off.  It will be noisy, and add routine wear to the bearings and seals. There is no way to stop the rotation without a shaft brake.

Here are the rules:

If you have a Volvo with a ZF25M transmission:
  • Sailing in neutral is acceptable with any propeller. The prop WILL spin with a fixed prop or an AutoProp, and MIGHT spin with a MaxProp. While spinning, the prop is noisy and adds routine wear and tear to the bearings and seals. 
  • With a MaxProp or a fixed prop, you can sail in reverse and the prop will not turn. This is acceptable.  
  • With a fixed prop, if you sail in forward, the propeller will spin, and the transmission will be damaged quite quickly.
  • With a MaxProp, if you sail in forward, the propeller MIGHT spin, and if it does the transmission will be damaged quite quickly. 
  • With an AutoProp, you can sail in forward and the prop will not turn. This is acceptable.
  • With an AutoProp, if you sail in reverse, the propeller will spin, and the transmission will be damaged quite quickly.
If you have a Yanmar with a ZF25 transmission,
  • With any propeller, the shaft can spin when sailing. This is acceptable, again, other than the noise and additional routine wear on bearings and seals.
  • The only way to stop this rotation is to use a shaft brake.


Bill Kinney
SM160,  Harmonie
The boat is in Charleston, we are in Antigua finishing up a delivery.


Re: Prop is spinning freely

Danny and Yvonne SIMMS
 

A great reply Bill. Best explanation Ive seen. However I am going to drop a curly one here. I have a Volvo and a ZF 25M gearbox and an auto prop.For reasons I have not discovered it will sometimes lock in reverse, sometimes in forward. I have to observe the shaft spinning and engage one or the other. The correct selection will exhibit a satisfying clunk and the shaft stops dead. The wrong results in a soggy almost stop, in which case obviously I change to the other. It is random, so I just take care and always check.

Kind regards and wishing you all the best for the new year.

Danny

SM 299

Ocean Pearl

On 11 January 2021 at 14:18 "Karen Smith via groups.io" <karenharmonie@...> wrote:

Mark,

I think you are mixing up the ZF25M transmission and the ZF25. The document you reference is for a ZF25M, not the ZF25.  This has been a common source of confusion on the forum, since both of these are the common transmissions used in many Amel boats. The similar model numbers for two very different machines has always been an issue.

This is my understanding of this un-necessarily complicated issue:

The ZF25M is a smaller, lower horsepower rated, transmission that shifts mechanically. I believe none of these transmissions were ever fitted with a shaft brake, because none was needed.  The ZF25, even though it has a very similar part number, is a very different beast.  I doubt the ZF25M and the ZF25 have any parts in common.  The ZF25 is a higher horsepower rated, hydraulically shifted, transmission.  As far as I know (and this might not be correct) the Volvo TMD22 engines all had ZF25M and the Yanmars all had ZF25.  Note that these model numbers changed when the original Hurth brand was bought out by ZF.

As the document you quoted points out, the ZF25M can free-wheel without damage, other than routine wear on bearings and seals. With a normal fixed prop or a MaxProp, putting it in reverse will lock the rotation.  The AutoProp is a different story.  It rotates in the opposite direction when free-wheeling, and needs to be put in FORWARD to lock it.  The rule for operation should be “Do not allow the transmission to free wheel while in gear—ever.”  If the prop rotates while in reverse, put it in forward.  And the other way round.

The ZF25 relies on the hydraulic pressure generated by the rotating input shaft (from the engine) to shift.  If the engine is not turning, it will always be in neutral, and neither forward nor reverse can be engaged no matter what the position of the shift lever.  Therefore, the prop will always spin when the engine is not running.  Most hydraulic transmissions require the engine input shaft to be turning to pump the fluid internally to lubricate the moving parts. The ZF25, however, is allowed to rotate with the engine off.  It will be noisy, and add routine wear to the bearings and seals. There is no way to stop the rotation without a shaft brake.

Here are the rules:

If you have a Volvo with a ZF25M transmission:
  • Sailing in neutral is acceptable with any propeller. The prop WILL spin with a fixed prop or an AutoProp, and MIGHT spin with a MaxProp. While spinning, the prop is noisy and adds routine wear and tear to the bearings and seals. 
  • With a MaxProp or a fixed prop, you can sail in reverse and the prop will not turn. This is acceptable.  
  • With a fixed prop, if you sail in forward, the propeller will spin, and the transmission will be damaged quite quickly.
  • With a MaxProp, if you sail in forward, the propeller MIGHT spin, and if it does the transmission will be damaged quite quickly. 
  • With an AutoProp, you can sail in forward and the prop will not turn. This is acceptable.
  • With an AutoProp, if you sail in reverse, the propeller will spin, and the transmission will be damaged quite quickly.
If you have a Yanmar with a ZF25 transmission,
  • With any propeller, the shaft can spin when sailing. This is acceptable, again, other than the noise and additional routine wear on bearings and seals.
  • The only way to stop this rotation is to use a shaft brake.


Bill Kinney
SM160,  Harmonie
The boat is in Charleston, we are in Antigua finishing up a delivery.


Re: Eumenia Mini 5500 Dishwasher Parts

Elja Röllinghoff Balu SM 222
 

He Kenneth ,

In germany is a shut down since december an i think we stay bis end of januar when it is going bad end of februar

Best
Elja SM 222
Balu

Von meinem iPhone gesendet


Eumenia Mini 5500 Dishwasher Parts

Ken Powers SV Aquarius
 

All,

I have a Eumenia Mini 5500 Dishwasher, and would like keep Aquarius stock.  But, need to get spare parts for the dishwasher.  I have emailed ersatzteile@schabauer-service dot at , but have not received a response.  The evacuation pump is out, and might try to find a replacement which is similar if I can not get the exact replacement.

Any thoughts on what I should do.

Thanks!

Kenneth Powers
Aquarius sm2k262


Re: Prop is spinning freely

Karen Smith
 

Mark,

I think you are mixing up the ZF25M transmission and the ZF25. The document you reference is for a ZF25M, not the ZF25.  This has been a common source of confusion on the forum, since both of these are the common transmissions used in many Amel boats. The similar model numbers for two very different machines has always been an issue.

This is my understanding of this un-necessarily complicated issue:

The ZF25M is a smaller, lower horsepower rated, transmission that shifts mechanically. I believe none of these transmissions were ever fitted with a shaft brake, because none was needed.  The ZF25, even though it has a very similar part number, is a very different beast.  I doubt the ZF25M and the ZF25 have any parts in common.  The ZF25 is a higher horsepower rated, hydraulically shifted, transmission.  As far as I know (and this might not be correct) the Volvo TMD22 engines all had ZF25M and the Yanmars all had ZF25.  Note that these model numbers changed when the original Hurth brand was bought out by ZF.

As the document you quoted points out, the ZF25M can free-wheel without damage, other than routine wear on bearings and seals. With a normal fixed prop or a MaxProp, putting it in reverse will lock the rotation.  The AutoProp is a different story.  It rotates in the opposite direction when free-wheeling, and needs to be put in FORWARD to lock it.  The rule for operation should be “Do not allow the transmission to free wheel while in gear—ever.”  If the prop rotates while in reverse, put it in forward.  And the other way round.

The ZF25 relies on the hydraulic pressure generated by the rotating input shaft (from the engine) to shift.  If the engine is not turning, it will always be in neutral, and neither forward nor reverse can be engaged no matter what the position of the shift lever.  Therefore, the prop will always spin when the engine is not running.  Most hydraulic transmissions require the engine input shaft to be turning to pump the fluid internally to lubricate the moving parts. The ZF25, however, is allowed to rotate with the engine off.  It will be noisy, and add routine wear to the bearings and seals. There is no way to stop the rotation without a shaft brake.

Here are the rules:

If you have a Volvo with a ZF25M transmission:
  • Sailing in neutral is acceptable with any propeller. The prop WILL spin with a fixed prop or an AutoProp, and MIGHT spin with a MaxProp. While spinning, the prop is noisy and adds routine wear and tear to the bearings and seals. 
  • With a MaxProp or a fixed prop, you can sail in reverse and the prop will not turn. This is acceptable.  
  • With a fixed prop, if you sail in forward, the propeller will spin, and the transmission will be damaged quite quickly.
  • With a MaxProp, if you sail in forward, the propeller MIGHT spin, and if it does the transmission will be damaged quite quickly. 
  • With an AutoProp, you can sail in forward and the prop will not turn. This is acceptable.
  • With an AutoProp, if you sail in reverse, the propeller will spin, and the transmission will be damaged quite quickly.
If you have a Yanmar with a ZF25 transmission,
  • With any propeller, the shaft can spin when sailing. This is acceptable, again, other than the noise and additional routine wear on bearings and seals.
  • The only way to stop this rotation is to use a shaft brake.


Bill Kinney
SM160, Harmonie
The boat is in Charleston, we are in Antigua finishing up a delivery.


Re: Headsail roller furling replacement motors

Germain Jean-Pierre
 

Hello Rod,

Welcome to the Amel resources!!! Greatest asset to ownership... in my opinion of course!!

Amel is now using Facnor furlers on their new boats. FWIW...

Would you include the type, name of your vessel and it’s location in your signature block? Helps in locating spares, trades etc near your boat. 

Cheers,

Jean-Pierre Germain, Eleuthera, SM 007, New Zealand


On 11/01/2021, at 9:40 AM, Rod Glassford <rod@...> wrote:

Hello all Amel owners! I’m new to the site, and too our Amel . We own a 1986 Amel Maramu and need too get a replacement (spare) headsail furling motor. Does anyone know what is available?
cheers,
Rod

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