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Old 22-06-2022, 21:21   #16
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Re: Which gasket is this?

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I just googled yanmar ysm20fc & found those 3 links. They appear to be J20 sailboat help links. Don't know why they won't open for you.
I am not familiar enough with your model to id. the gasket from ur pics.
Someone will come along.

EDIT: Yanmar 2GM20FC
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Old 23-06-2022, 05:49   #17
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Re: Which gasket is this?

@sailmonkey: it's lower and to the left see photo
@wyb2: That makes sense. I was watching to see if I had successfully dealt with a coolant leak and saw a leak there. I assume it would have been oil if it was leaking, but what I saw was clear. I had to leave and am trying to plan ahead for my trip back.
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Old 23-06-2022, 05:56   #18
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Re: Which gasket is this?

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@sailmonkey: it's lower and to the left see photo

@wyb2: That makes sense. I was watching to see if I had successfully dealt with a coolant leak and saw a leak there. I assume it would have been oil if it was leaking, but what I saw was clear. I had to leave and am trying to plan ahead for my trip back.


I’m that case, i suspect that skipperpete mailed it.
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Old 23-06-2022, 14:56   #19
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Which gasket is this?

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Can you help identify this piece of rubbery gasket sticking out? It's under the head/block area (please forgive my lack of proper terminology).


Maybe inspect the water pump">raw water pump hose in this photo, it looks like it’s chafed through to the fabric in one spot .....and the hose clip looks a bit shabby too.
Pete.
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Old 23-06-2022, 15:18   #20
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Re: Which gasket is this?

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@sailmonkey: it's lower and to the left see photo
@wyb2: That makes sense. I was watching to see if I had successfully dealt with a coolant leak and saw a leak there. I assume it would have been oil if it was leaking, but what I saw was clear. I had to leave and am trying to plan ahead for my trip back.
Agree that you shouldn’t have coolant leaking in that area. I would think

1. Coolant leak from a higher, hard-to-see place is running down and forming drops in this area

2. Fresh or low-hour oil isn’t dark black, small leaks can look basically as clear as water, especially against a non-white surface. Feel or smell might confirm what it is.

3. Could be leftover drops from the leak you just fixed. If it was spraying, or a mess was made when working on it, running the engine can jostle loose droplets that were hanging out in unseen places.
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Old 23-06-2022, 17:31   #21
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Re: Which gasket is this?

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Sorry, Yanmar 2gm20f. This is looking aft, behind/below the belts and above the pan. I. believe that hose is from the sea water pump into the block?
That hose is nearly chafed through and failure is imminent.
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Old 24-06-2022, 01:41   #22
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Re: Which gasket is this?

This is the oil-pan gasket. You can see it as part no 2 in the link sent by 'Deblen'.
As far I can see your gasket is mounted well with the small eye outside. No leaks; leave it as it is. The eye is probably to make it a bit more easy positioning the gasket while mounting.
Have nice sailing.
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Old 03-07-2022, 14:11   #23
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Re: Which gasket is this?

If your question is “ why is this tab sticking out” engine mfgr’s make lots of engines and try to make things like gaskets as interchangeable as possible. Some other similar engine makes use of that tab. We just got our engine back from the shop- the new head gasket has similar tabs- yet I know the gasket is the right one, because I ordered it from the engine maker ( Isuzu) and it came with references to our engine.
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