Sailing Yacht

Yanmar YSE12G Maritime Diesel Strip Down





Conversing to a marine diesel provider in Sydney at the minute, may be ready to rebuild this quite low-cost.

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38 comments

  1. Great and indestructible motor there! Got one in my excavator I just did a vid on . Hey please keep this one!!!!

    Love it! Sorry I got here so late to this video. Man I love Yanmar stuff. Awesome. Another great video! Steven

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  2. Thanks a lot for posting yr vids. I'm going thru some of the same issues on a YSM8 on a yacht. Parts are MUCH cheaper in the USA but you need to know someone over there that will on send the stuff for you as Yanmar ties them up in dealer agreements. The exhaust design causes a lot of problems as we had the same issues with water coming back thru the exhaust v/v. We actually bent a pushrod fresh water flushing it. I'm going to fabricate a taller riser & inject the water lower down.
    ย cheers paul

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  3. You can stop the Phony Australian accent. Anyone can tell a real one. Just joking, thanks for the great video.ย 

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  4. YSM's are a modern version of this engine, I imagine they are different

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  5. are you sure that it's a YSM12G? mine looks totally different ๐Ÿ™‚

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  6. To remove the injector I had to remove the studs, remove the top of the injector, installed a bolt with the corect tread in the injector housing and with a puler i was able to remove the injector. During the instalation I used anti seize compound.

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  7. cleaning this one will take a long time. a new piston would help too. maybe the oil is incinerated?

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  8. Nice

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  9. that will be a nice engine once its fixed back up. good luck with it

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  10. @Aussie50 I was gonna say see if u can get ur hands on a mold for the cover, pickle forks come in handy somtimes especially with odd angles like that

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  11. @BOBKB3NZX I did injection molding, but never used tools like that to remove tapered components.

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  12. @Aussie50 WAIT! dont you do plastic blow molding??? injector is a taper fit, id say use a mini pickle fork to get it out

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  13. That engine looks rough, hopefully parts are cheap enough for it

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  14. Nice big "Repower with Kohler Diesels" Ad right next to the video. It's almost as if Google Adsense knows your engine is in a sad state,

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  15. Great vid!! From what I can see of the cylinder, looks like a ridge ream and a good honing should clean it up well enough. Since you have the electrolysis tank, you are way ahead of most of us ;D

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  16. electrolysis is a great method for getting in to hard to get places !!

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  17. Is that a prechamber head?

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  18. So it needs a new piston, rings, valves, rocker cover, starter motor, new cylinder sleeve, oil pump, new big end bearing, gaskets. While at it maybe put in a new wrist pin bushing, (gudgeon pin bush). I wonder how close the parts are in the China copies? I don't think it's ruined but whether it's worth fixing will depend on how cheap you can get it, at least you can do most of the work yourself with the tools you have.

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  19. has a yse8 on my old sailboat. great motor, the injector is suppose to just pop off

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  20. should be a sacrifcial anode in the engine..?

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  21. whats the displacement?

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  22. Neglect- the biggest killer of diesel engines.

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  23. I hope it ain't too far gone, it looks like it'll be fun to play with, Good honing should fix that

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  24. Sweet vid. I am looking forward to seeing that diesel run.

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  25. That aluminium in the block isnt a thermostat but the sacrificial anode which minimizes corrosion in side the engine as these engines are designed to be saltwater cooled. From memory there are two of these small inserts that look like sparkplugs in the block somewhere. From experience I dont think that engine will be turning anywhere near those revs.At about 1500rpm or so a lightly built wooden boat shakes so much it blurs your vision. When its running put an rpm meter on it.

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  26. Injector has a taper fit, no threads. But judging on the overall condition i'd soak it in PB catalyst first

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  27. You have a very calming voice!

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  28. some people are jack wagons and take the thermostat out because once in awhile a engine will over heat but that is usually after 100's of hours and if its the thermostat people suddenly think there eval and do no good so they run them with our thermostats

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  29. @CMDRSweeper any fresh water boat runs the water through the engine block but you NEED a heat exchanger if you're in salt water or your engine will do die soon fresh water is no wear near as harmful as salt water

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  30. u have a bit of work ahead of u with this one ed

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  31. @chris746568462 redline at about 3,000 RPM, happy at 2200 – 2800

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  32. What sort of rpm do these engines do?

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  33. @V8Jagnut yeh, it parts are not cheap, I will part it out and add it out the Jag fund

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  34. @Diddleshot I could have started it on the spot, but I dunno about stopping it with so much blow-by ๐Ÿ˜€

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  35. so sad. just part it out and spend more time and do more vids on your jag ๐Ÿ˜›

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  36. Nice old engine, rusty as heck. If you can get her to start then that'l be brilliant.

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  37. @mafiouso its rough, but I've fixed worse .

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