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SD 50 service

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Hudson30 View Drop Down
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Joined: 04 May 2014
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hudson30 Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2015 at 02:42
Hi Zorro
Just spoke to the Yanmar dealer you are correct in saying that it is an ongoing matter for the SD50 sail drives. He has not replaced the cone but lapped it and replaced thrust bearings and a few other small parts.
I would be interested in your spare cone given I will have to replace mine eventually. If you could send me an email on hudson30@gmail.com with the price hat would be helpful.
I asked also about the ongoing running of the saildrive to reduce wear - as per your comments but he was not aware of anything in particular that would reduce wear of the cones - he was going to call the national Yanmar specialist to check - I will pass on anything I hear from him to the forum
I am now looking forwards to sailing this weekend!!
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Rock View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rock Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2015 at 08:12
Guys,
Surely all of us with SD50 saildrives are watching this topic  closely.
While I have not had issues with my shifting/clutch (yet), I'm anticipating.
 
How does the problem start?, you shift forward but the gears don't engage, i.e. engine revving without propulsion?
 
Is the problem both in forward and backward?
 
From the first moment you notice the issue, can you still use the engine, how longs does it take to get progressively worse/unworkable?
 
Can you still counter the problem  initially by adjusting the morse cables?
 
Many questions, I know, but would very much like to understand as we are starting a  3 week trip on the boat.
 
Peter. 
Hanse 400e "M-square2" #0241
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Zorro View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zorro Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2015 at 10:52
Hi Peter,
 
It will come slowly. Each time it was difficult to get the forward to work. However - if I put the gear stick in forward really fast and tough it will engage but you will not like the sound. I guess it is mostly in forward you will encounter the problem so you can always go in reverse. However going in reverse from you vacation might not be the most fun project (if there is no wind).
 
Sad thing is the cost to replace and fix every now and then... Yanmar doesn't take any resonsibility. I think they should price the clutch cones really low and support owners instead....
 
Z______________________________
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StavrosNZ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StavrosNZ Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2015 at 23:34
I like many of you had to deal with an SD50 cone re-lap at 200hrs with no motor sailing, nothing caught around the prop and no reason for clutch wear other than recreational use. screams of not being fit for purpose in my book.

Yanmar have designed a lemon and are ducking and diving on this all over the world.

It needs a collective group to pool resources and take action against Yanmar to make them deal with this head on.

If a group of like minded owners are prepared to join forces i would add my own experience and some time and money into an action against them.
Stephen
2010 H400, Auckland, New Zealand
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Heikki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heikki Quote  Post ReplyReply Direct Link To This Post Posted: 14 July 2016 at 18:11
Hi everybody,

It seems I am facing the clutch problem now. I have read the instructions given in mentioned uploads. There is a big difference in number of lappings. Leucat says: push and turn the gear about 5 times both clockwise and counterclockwise. Whereas the other instruction tells you to do it 50 times. I think the latter is closer to correct just based on common sense. What do you say who have done the job?

Regards
Heikki
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astarte View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote astarte Quote  Post ReplyReply Direct Link To This Post Posted: 14 July 2016 at 20:33
Hi all,

Just started to have the same problem. The clutch is slipping now and then. Just about to do my summer cruise, so how long does it take before I really get severe problems? At the end, polish or replace the cone?

Kristoffer
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Idelfix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Idelfix Quote  Post ReplyReply Direct Link To This Post Posted: 14 July 2016 at 21:10
"Keep sailing in free wind"

http://suhrfa.blogspot.se


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Mark_J1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark_J1 Quote  Post ReplyReply Direct Link To This Post Posted: 14 July 2016 at 21:53
Heikki - you can see the surface glaze before lapping the surface. The job is done when the surface is evenly a matt finish. I had help in doing this so I'm speaking from observation rather than expertise.   However it took a lot longer to disassemble the cone clutch assembly than do the lapping.

Kristoffer - not sure it's easy to forecast. Too many variables. However on my boat it went from the first slip event to occasional slipping to every other time I engaged forward gear over about 2 weeks of coastal sailing (roughly 30-40 engine hours with a mix of conditions). At that point I didn't risk it further. If the worse happens you'll probably still have reverse!

Mark
Hanse 400e "Grey Goose" Hull #31
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Rock View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rock Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2016 at 12:38
It's not cheap, but I decided to get away from the SD50 mess altogether (clutch slippage and seal leaks) by getting an SD60.
Figured that multiple new clutches (appears inevitable) and seal replacements ( the seals are not the cost but the repair is costly) are more costly in the long run. Also now have brand new saildrive with new factory warranty again.

SD 60 is new design, has no cone clutch (back to reliable plate clutch), and it is designed stronger (takes up to 110 hp engines).
I got the SD60 at what I believe to be close to 'cost' from yanmar.
Seems yanmar is happy to get SD50's out of the market.
Including installation still looking at 4+K, but priceless 'peace of mind'

Peter
Hanse 400e "M-square2" #0241
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Mark_J1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark_J1 Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2016 at 14:19
Forgot to mention for those that haven't experienced the slipping clutch, it was a little weird the first time it happened. It was like I had rope around the feathering prop preventing the prop from biting. I did still have some forward propulsion (maybe 1 knot) but the revs were much too high. Odd sensation and even more so if you aren't on the helm yourself at the time. It was only when I took the helm myself and dropped out & back into gear that I got the 'clunk' sound that others mention when the clutch finally bites. Makes you very certain you do a gear selection test before any departure!

Mark
Hanse 400e "Grey Goose" Hull #31
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