EH65 spitting fuel from breather hose into air filter.

[Jim Kessell]

2005 American Landmaster

EH65 Subaru Robins

spits fuel from breather hose into the air cleaner and then down into carb.  What’s causing this ??

[Jim Kessell]

I apologize to all who I left scratching their heads about my last post !!

Turns out to be fuel diluted oil coming from the breather.  I’ll be taking the carburetor off AGAIN !!!

[Greg Kilgore]

Just like an old car or truck PCV valve.

PCV = Positive Crankcase Ventilation

Basically any gasses that blow-by the piston rings into the crank case need a place to go. So the PCV valve (one-way check valve) let the gasses out but doesn't allow any in. Usually a hose runs from PCV valve to breather and sent back into combustion chamber. 

Since the gasses are in the crankcase some oil may be pulled up as well.

Or it could be something else. Just a thought. Home this helps and good luck with the repair.

 

Kilgore.

[W B]

On 10/26/2024 at 1:51 PM, Jim Kessell said:

I apologize to all who I left scratching their heads about my last post !!

Turns out to be fuel diluted oil coming from the breather.  I’ll be taking the carburetor off AGAIN !!!

Jim,

Have you checked oil level in engine? Does it smell like gas? If overful it could be sucked by the breather back to carb.

[Jim Kessell]

WB

I was hoping you would respond. 
It was definitely gas infused and slightly over full. Took the carb off and changed the float and needle valve.  Reworked the fuel solenoid.  I have it running pretty well now but was having the issue with the blow back. 

[Jim Kessell]

Anyone know the dimensions of the output shaft for a Subaru Robin EH65 ??

Thanks Jim

[W B]

1"| diameter.  I'll check the length if you need Jim.

 

[Jim Kessell]

That’s what I was hoping it would be. 
All I need, many thanks my friend !!