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Old 01-09-2015, 05:47   #31
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Re: Slipping Yanmar SD50 Cone Clutch

Originally Posted by arsenelupiga View Post
I see not much issue relapping/changing even every 100 hrs
That certainly would not be acceptable to me, but to each his own.



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Old 14-09-2015, 01:08   #32
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Re: Slipping Yanmar SD50 Cone Clutch

my cone cluch story got a twist. I assumed any problems to do with engagement is to do with cone clutch. All that noise on internet made me not do proper research.

Now, as I am looking at issue in more detail and doing testing, realised that issue in my case is not (only) cone clutch.

What is happening is that folding propeller sometimes does not fully open! Blades are at around 45 degrees and there is almost no push forward. Propeller rotates, for sure even very fast but not fully open.

I have checked and propeller folds/unfolds smoothly by hand.

Sequence - 2000 RPM as blip to unfold propeller fully, then back to 1200 works fine. Adding RPM fast at this point makes prop not expand fully and I assumed is cone clutch. Maybe adding RPM's slowly will get better results.

L400 is good in this respect as one can easy observe propeller in action.

So, back to drawing board.

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