Universal M18 unattached hose

[boater7cs]

I just purchased a 1986 Catalina 27 and I’m not familiar with diesels. I’m doing routine maintenance & noticed this hose that’s very loose & unattached. Can someone shed a light on its function? Thanks!

 

[kappykaplan]

Looks like one end is attached to the positive crankcase ventilation (PCV) valve. On my boat, the other end is hooked up to the air cleaner body.

 

[jssailem]

Kappy well done.
I don’t have a Universal but from the pictures of the M18, I found on the internet, that would be my guess. It only has a clip on the hose. Not a lot of pressure.The hose looks worn . Looks like it could be retired and a new one installed connected as suggested.

Perhaps someone with an M18 will share his/her experience.

 

[boater7cs]

Thanks both. There’s no port on the air cleaner to attach to & Nothing within the hose’s length

 

[kappykaplan]

I had to create a port on the air cleaner body to connect the hose. Prior to that, the hose dripped into the engine bilge.

 

[Stu Jackson]

Breather Hose 101 (w/ K&N Filter Pictures from Rick Allen)

K&N air filter breather hose

and Noah's: Oil "breather" hose to Air intake

and Kloeber's PDF and wiki link: Options to route crankcase breather to air intake

 

[boater7cs]

Great info Stu and Kappy. Thank you

 

[kappykaplan]

Great info Stu and Kappy. Thank you

You are quite welcome!