Re: Hurth HBW-250-3R transmission leak

James Alton

Bill Kinney, Bill Rouse,  Nick and to everyone that responded to my post.    I feel very lucky to have the support of this forum and I am overwhelmed by the detailed and helpful responses.  Thank you.

James Alton
SV Sueno
Maramu #220

-----Original Message-----
From: James Alton via <lokiyawl2@...>
To: <>
Sent: Sun, Aug 7, 2022 3:56 pm
Subject: Re: [AmelYachtOwners] Hurth HBW-250-3R transmission leak


   Thanks a lot for quick response and for the excellent photos\ information, that is exactly what I needed! It looks like I should be able to handle this work without even pulling the transmission.  Knowing the seal size could be helpful if I end up having to match it up but I will first try to source a seal kit for this transmission.

James Alton
SV Sueno
Marmau #220, now sailing along Patara Beach, Turkey, enroute to Gemlier.

-----Original Message-----
From: Mike Longcor (SV Trilogy) <svtrilogy53@...>
Sent: Sun, Aug 7, 2022 3:32 pm
Subject: Re: [AmelYachtOwners] Hurth HBW-250-3R transmission leak

Hi James,

You just need to replace the lip seal (sorry I don't know the size - can check). I did this by removing the shifting arm shaft. Hopefully the attached photos help. I used some gasket maker/RTV when mounting it back on the gearbox.

Mike Longcor
SV Trilogy SM23

On Sun, Aug 7, 2022, 11:21 PM James Alton via <> wrote:
   Recently the Hurth HBW-250-3R transmission on my Maramu has developed a slight transmission oil leak.  The leak is clearly located in the shifting arm shaft, the output shaft seal is dry.  
There does not seem to be any binding in the shift linkage since when in either forward or reverse the shift arm can be easily moved a very slight amount.  Has anyone else had to deal with 
this leak issue and if so what parts/seals were needed?  I am currently cruising the Southern coast of Turkey and anticipate soon moving up the Western coastline.  Can anyone recommend 
someone that could supply parts or perform service on this transmission in Turkey?

James Alton
SV Sueno
Marmau #220

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