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A good way to ruin your SD50 saildrive

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Anfield View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Anfield Quote  Post ReplyReply Direct Link To This Post Posted: 12 September 2020 at 17:45
My clutch seems to work fine in forward. I noticed a problem today and it is like this:

In reverse at low RPM it is engaged but the speed is really low. If I increase the rpm it is a “clunk” and the speed increases. 

I have not heard about others with similar problems. Anyone know if this is a slipping clutch?
Bekkis

Hanse 370e 2007 #708
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Captain Cook View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 12 September 2020 at 20:42
Hi Andrew
The 370 was delivered standard with 3YM30 and SD20, and for 16.130 SEK you could upgrade to the 3JH4E with SD50. The SD50 has a cone clutch (with problems), the SD20 has a dog clutch.
So the question is: Is your saildrive the SD50?
:Kjeld


Edited by Captain Cook - 12 September 2020 at 20:47
Freya Hanse400 #27 from 2006, 40HP Yanmar 3JH4E, Teak deck, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M802(SSB)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark_J1 Quote  Post ReplyReply Direct Link To This Post Posted: 12 September 2020 at 22:59
As Captain Cook says. Cone clutch issue is one of the Achilles heel issues on the SD50. The symptoms you describe are exactly like I had when I first encountered the issue if that is the drive you have. Though in my case it only happened when forward gear was engaged. If it is the cone clutch don’t despair!  I had mine removed and lapped. Cost was about £250 and it was removed and back in within the day. After that you can read up on all the tips earlier in the thread re extending the SD50’s life. 

Mark
Hanse 400e "Grey Goose" Hull #31
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Anfield View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Anfield Quote  Post ReplyReply Direct Link To This Post Posted: 13 September 2020 at 05:46
Originally posted by Captain Cook Captain Cook wrote:

Hi Andrew
The 370 was delivered standard with 3YM30 and SD20, and for 16.130 SEK you could upgrade to the 3JH4E with SD50. The SD50 has a cone clutch (with problems), the SD20 has a dog clutch.
So the question is: Is your saildrive the SD50?
:Kjeld

I have a 3JH4E with SD50👍🏻
Bekkis

Hanse 370e 2007 #708
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 13 September 2020 at 08:58
You can find a multitude of posts about "Yanmar cone clutch slipping" both here in myhanse and on the internet.
The description of your problem makes me think of a folding propeller, which is not fully unfolded at low RPM, but then I will have to ask: Do you have a folding propeller?
:Kjeld
Freya Hanse400 #27 from 2006, 40HP Yanmar 3JH4E, Teak deck, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M802(SSB)
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Anfield View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Anfield Quote  Post ReplyReply Direct Link To This Post Posted: 13 September 2020 at 09:59
Yes, I have a folding propeller so that was also my thoughts. 

I have read all the topics on this on this website at also other sites but have not noticed anyone with the reverse slipping and not simultaneously forward slipping. 

Anyway, I think I will lap my drive cone just to be sure. 
Bekkis

Hanse 370e 2007 #708
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Captain Cook View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 13 September 2020 at 10:25
My SD50 is from 2006, and I will surely not start lapping the cone before it starts slipping. But if you choose to be up front with it, remember to buy a repair kit which solves the problem by replacing the yellow materials. StavrozNZ has a post about this, but in my archive I found this:
(Toholte (Norway) wrote this 20/7-2019, send him a PM for advice)

"You can contact Gideon at saildrives@yahoo.com

 He is very helpful and willing to answer questions. You get a manual with the kit you need to read many times to complete the upgrade. I am in the middle of it now. The clutch is in pieces in my basement. It takes some time, but it’s not very difficult.

I paid USD 581 including shipping to Norway."

P.S.: Included the price of the kit are shims and a nut with lefthand thread. Yanmar has priced these items astronomically high (shims and nut), so the difference in price is not substantial.

https://www.youtube.com/watch?v=M4EwhbRHvvE



Edited by Captain Cook - 13 September 2020 at 10:42
Freya Hanse400 #27 from 2006, 40HP Yanmar 3JH4E, Teak deck, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M802(SSB)
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Anfield View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Anfield Quote  Post ReplyReply Direct Link To This Post Posted: 13 September 2020 at 18:31
Redarding folding propeller teory. Is the reverse gearing in a SD-50 different (needs more RPM to give same trust) than in forward?

My SD-50 har 650 hours.
Bekkis

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 13 September 2020 at 20:54
The bible for H370-owners is Marco's wesailhanse.se.
Both Operation Manual and Workshop Manual are available.
In the Operation manual you can find, that the gearing is the same in forward and reverse.

The shape of the propeller is optimized for forward motion, and so is the shape of your Hanse370 hull.

The intelligent sailor has downloaded a lot of stuff from wesailhanse, and the wisest of them have found a Workshop Manual on the Internet.
:Kjeld






Edited by Captain Cook - 13 September 2020 at 21:01
Freya Hanse400 #27 from 2006, 40HP Yanmar 3JH4E, Teak deck, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M802(SSB)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 14 September 2020 at 09:32
Originally posted by Anfield Anfield wrote:

If I increase the rpm it is a “clunk” and the speed increases. 

Your description fits a prop that has trouble folding out. This is most likely due to marine growth.

/H8jer


Edited by H8jer - 14 September 2020 at 09:35
Hanse 370#487 30HP 3-cabin
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