Parts found under Yanmar 3YM30

Oct 19, 2025
2
Hunter 36 Niagara-on-the-Lake
I have been having some exhaust leakage problems (possible cracked exhaust elbow) after an engine bang and stoppage. Engine restarted and continues to operate but found some small pieces under the engine afterwards (see attached photo). I am not sure if these pieces are related to this, but cannot identify where they came from. Anybody familiar with them?
 

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May 17, 2004
5,813
Beneteau Oceanis 37 Havre de Grace
None of it is Yanmar gray so my guess is it’s not related to the engine. Maybe some kind of odds and ends from a lazarette or something that bounced down into the pan?

Engines don’t usually bang and stop so I’d be looking it over closely for the root cause there before it repeats itself, possibly more spectacularly.
 
Oct 19, 2025
2
Hunter 36 Niagara-on-the-Lake
Sorry. It was not a test and I can understand the humorous side of it. However, I was afraid that I had blown out a frost plug or pressure relief device and could not find any reference to any such devices in my Yanmar manual. I did not know if it was a common occurence.
 
Jun 21, 2004
3,018
Beneteau 343 Slidell, LA
Drives me crazy when something spontaneously appears on deck, in bilge, etc and I don't have a clue of where it came from & its purpose!