Re: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop


Hola EricThe only place I can recommend for Kimbelite is CLUB DE PESCA , eventually CLUB NAUTICO (but only eventually)I suggest to avoid a long stay because  Cartagena Bay is very polluted and fouling grow up copiously.
I live 8 months/year in Caracas , where I am resident, the rest between Cartagena and Guna Yala(San Blas).Best wishesGabrieleSunny SideMaramu #219

From: "'sailormon' [amelyachtowners]" <>
Sent: Thursday, 21 December 2017, 13:30
Subject: RE: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop

  Hola Gabriele,Where would you recommend docking Kimberlite for a month or two in Cartagena?What town do you live in Colombia?Fair WindsEricKimberlite Amel Super Maramu #376      From: []
Sent: Thursday, December 21, 2017 11:02 AM
Subject: Re: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop    Hola EricThe place where I leave my boat is not at all a marina. It is a Yard  thought and managed for power boat. After ten years I benefit of a special place and a special conditions so I am satisfied also if it is very far from Amel´s owner typology.  I know the soot story becoming from the plant in adverse wind conditions.  Best regards Eric and Enjoy Colombia  GabrieleSunny SideMaramu #219  From: "'sailormon' [amelyachtowners]" <>
Sent: Wednesday, 20 December 2017, 15:58
Subject: RE: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop    Hola Gabriele,Are you satisfied with the marina that you are at in Cartagena?A year ago we were in the Santa Marta marina. It is a lovely marina. Unfortunately when the wind is from the East the boats get coated in coal dust as there is a coal burning plant to the East of the marina. I was thinking of heading to Colombia again later this year to spend some time with my novia.Gracias,EricKimberlite Amel Super Maramu #376   From: []
Sent: Wednesday, December 20, 2017 11:13 AM
Subject: Re: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop   James,Sunny Side is at Todomar Yard CartagenaYour understanding of my bad english is 100% correct.End of January, I will be on board and I will look for where I ordered my cooler from.The name of your boat is Sueno or Sueño ?RegardsGabrieleSV Sunny SideMaramu #219 From: "James Alton [amelyachtowners]" <>
Sent: Wednesday, 20 December 2017, 9:29
Subject: Re: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop   Gabriele,    I am glad that you are having good luck!  Thanks for the tip on the Militec-1, what I have read about the product sounds very promising.  I will order some and give it a try.    So if I understand you correctly,  you changed your aluminum cooler back in 1997 when the engine had 4,000 hours on it,  you now have 10,000 hours on your engine and you are still using the same cooler?  May I ask where you ordered your cooler from?  It seems that some people are having problems with their coolers corroding quickly.    Perhaps our boats were built side by side side since Sueno is #220?   May I ask where your boat is now? Best, James SV SuenoMaramu #220 
On Dec 19, 2017, at 4:00 PM, Gabriele Antolini [amelyachtowners] <> wrote:  Hi James - Good care : YES  ,  Exceptional care: I do not think so. The only thing I use ,  that not everyone use ,  is:  MILITEC-1 (everywhere possible, on sea and on land) according to the producer recommendations . Nothing to do with the cooler. - Cooler  : Yes I have the small square aluminum cooler. I changed it on 97 . when I received the boat, with 4,000 hours.From 99 to 2006 I was living on board using marinas only when could not be evitable. In the last ten years, at the end of my four months sailing season, in April, I ran the engine for one hour with fresh water(half an hour one day and half an hour, one day or two later) . A little of luck is always welcome. GabrieleSV Sunny SideMaramu #219From: "James Alton [amelyachtowners]" <>
Sent: Tuesday, 19 December 2017, 12:06
Subject: Re: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop  Gabriele Anolini,    That is amazing,  you must be taking exceptional care of your transmission.  Do you have a cooler on your transmission?  Foley seems to be saying that 1000 hours is about all that we should expect.  It would be nice to know which factors seem to lead to a longer service life.    Happy Holidays, James SV SuenoMaramu #220 
On Dec 19, 2017, at 11:25 AM, Gabriele Antolini [amelyachtowners] <> wrote:  James I can confirm you that the Hurth 250 transmission can work much more than 4,000 hours. Mine passed 10,000 hours and , still now, never gave me a problem. Best Gabriele AntoliniSV Sunny Side Maramu #219Todomar Yard Cartagena From: "James Alton [amelyachtowners]" <>
Sent: Monday, 18 December 2017, 23:42
Subject: Re: [Amel Yacht Owners] Hurth Transmissions freewheeling folding prop  Dave,    Thanks for this information.  At least I now know that at least some of the Hurth 250 transmissions installed on Maramu’s are lasting longer than the 4,000 hours that mine has..  So far my transmission seems to be working fine but the failure mode that you experienced does not sound like a pleasant to experience so maybe I will do something preemptive before long.       I have heard of others having a problem with their aluminum coolers corroding quickly as well..  Without being bonded, I would think that the aluminum parts immersed in seawater would become the sacrificial items on the engine so maybe that could be part of your problem as you suspect.  I am wondering however if there is more than one manufacturer of these coolers with some being made of a more corrosion resistant alloy?  The original cooler on my transmission had a plate on it that in large letters had the name Hurth,  Monchen,  Made in West Germany.  The old rusty hose clamps, hoses and the apparent age of the ID plate and mounting bolts suggests to me that this cooler had been on the transmission for a very long time..  The one that I ordered as a replacement and installed this year with all new hoses was sold by “Mr Cool” 3306107001 ZF Transmission/Gear Cooler.  The replacement cooler cost $165.00 USD.  The Cooler being sold by Foley is much more expensive,  $395.00 which comes with a quart of their special synthetic fluid. I think I will inquire and see what they say about the large cost differential.    Can you tell me where you have been buying your coolers?     In part over corrosion concerns for my cooler, I have been flushing the engine with fresh water whenever the engine will sit for more than a couple of days which I think should help to reduce the corrosion some.   I think that I will open the cooler at least every couple of seasons to see how much corrosion is present.   Best, James  AltonSV Sueno,  #220Arbatax,  Italy 
On Dec 18, 2017, at 8:32 PM, David Wallace [amelyachtowners] <> wrote: James,  Our Hurth 250 started acting up in 2002 with about 6000 hours on the engine. Intermittently it would not go into forward, first discovered when backing out of a slip which made for an interesting evolution. We had it rebuilt with no issue. Maybe I have a grounding problem on the 4.154 but the aluminum cooler only seems to last a year or two.. I now have several, and try to catch the corrosion before it gets to bad. Then I clean up the cooler and rebuild it with aluminum epoxy that I buy from Cotronics. Works really well. Regards, Daves/v Air OpsMaramu #104 On Dec 18, 2017, at 7:50 AM, James Alton [amelyachtowners] <> wrote:  Mike,    My Maramu has a plate mounted just in front of the shift lever warning to never leave the transmission in Fwd. gear while sailing..  My boat has a fixed 20” (?) 3 blade prop which can produce a large amount of torque when sailing at higher speeds.  I am guessing that since your prop feathers(so produces little torque if any when feathered)  that it may not matter as much which gear you use but apparently due to the design the Reverse gear is stronger and therefore safer to use when locking the prop shaft.  Perhaps others can verify if this would be correct.    I also read in Foley the these gears seem to last about 1000 hours on average.  The gear on my boat has the same paint as the engine and I don’t see any evidence of it having been replaced.  The engine now has just over 4,000 hours.  Could others comment on the life expectancy the have experienced with the Hurth gears?  My boat appears to have had an aluminum cooler for a very long time,  it may in fact have been original based on the installation.  I replaced the old cooler with a new aluminum one..  The old one was not leaking but when cleaning out the inside I found several pin holes that were only plugged with corrosion so it was overdue..  I just got an email back from Foley saying that they have discontinued selling the stainless coolers and now only sell the aluminum.  I wonder if there were corrosion concerns betwee the aluminum gear case and the stainless coolers.  I will try to find out.  Best, JamesSV Sueno,  Maramu #220 
On Dec 18, 2017, at 11:19 AM, 'Mike Ondra' [amelyachtowners] <> wrote:  Who’d of thought there was so much to know about transmissions and their lubrication! Foley website full of interesting information. On a related topic... Dr.. Diesel Tip #101 at Foley says DO NOT put Hurth trans into forward to stop freewheeling, only reverse.We have always put the trans in forward to stop the freewheeling and fold the Autoprop when under sail. Given Amels have a “C” drive, does Dr. Diesels Tip apply? Have to pose the question just in case there are opinions among our ranks. Mike OndraAletes SM#240Falmouth Harbor, Antigua  
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