I'm trying to determine the purpose of the hose in the following picture of my trawlers engine.
My engine is a Yanmar 6LY3-UTC. Any thoughts?
View attachment 105881
What angle is that photo taken at - from the bottom of the engine?
At first I thought it was an oil change hose, but there would be a valve at the engine end.
Could be a blow by hose?
What angle is that photo taken at - from the bottom of the engine?
At first I thought it was an oil change hose, but there would be a valve at the engine end.
Could be a blow by hose?
So then you just replace the filter dry?
That engine is notoriously messy to change the filter. There is a shallow basin as part of the after cooler casting that catches (some of) that oil. That hose drains that basin. So put a container underneath the hose when you remove the filter. Better yet try (and it isn't easy) to wrap a baggy around the filter to catch the oil.
Some people say you can contain the oil that way. I haven't had much success with that.
David