Well, you got me thinking – and I found this – 

https://www.youtube.com/watch?v=Ap1AH-9UNjU

Interesting, Possibly it could have been to get the oil out so it doesn’t 
carbon up the valves, like this guy rants about? It is a gas engine, but same 
difference. 

 

 

 

Bill Coleman

Erie PA

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bruce 
Whitmore via CnC-List
Sent: Tuesday, May 12, 2020 1:48 PM
To: C&C List
Cc: Bruce Whitmore
Subject: Stus-List Yanmar breather vent fitting with hole in it?

 

Hello all,

 

I have a 1994 C&C 37/40+ with a Yanmar 3JH2E engine.  Interestingly, in the 
breather vent line leading to the air filter, there is a fitting with a hole in 
it that pretty clearly was intentionally installed, and even looks factory 
fitted.

 

You can see it here:  Breather Vent Tube.jpg 
<https://www.dropbox.com/s/l56ojbgqbh7eya5/Breather%20Vent%20Tube.jpg?dl=0> 

 

That leads to the center of the air filter, and presuming a vacuum is created 
when the engine is running, would mean the engine could be sucking in 
unfiltered air through this small hole. 

 

Do any of you know what the purpose of this fitting is?  It does not show up in 
the overhaul or parts manual for this motor.  I am thinking of getting rid of 
it.

 

Thoughts?

 

Thank you! 

 



 



Text Box: 




  <https://s.yimg.com/nq/storm/assets/enhancrV2/23/logos/dropbox.png> 


Breather Vent Tube.jpg


Shared with Dropbox

 

 

 

Bruce Whitmore

1994 C&C 37/40+ "Astralis"

Madeira Beach, FL

(847) 404-5092 (mobile)
bwhitm...@sbcglobal.net

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