GCV190 / HRX 217

[Butch1957]

When Running Engine Leaks Oil Out Of The Carburetor. I Pulled The Flywheel & Cleaned A Port Of Where The Oil Drains. Still Leaks Oil. Engine Has Good Compression.
Any Suggestions ?

 

[bertsmobile1]

Reasons why oil leaks from carb
1) bad float valve allowing petrol to drain into te sump when not in use thinning the oil
2) engine being tipped to far with carb side down
3) oil level to high

 

[Butch1957]

Reasons why oil leaks from carb
1) bad float valve allowing petrol to drain into te sump when not in use thinning the oil
2) engine being tipped to far with carb side down
3) oil level to high

The Float Valve In The Carby? Once Starting Within Two Minutes Oil ( thin oil ) Starts Pouring Out The Breathet Tube & Out The Carby.

 

[bertsmobile1]

The carb float needle is not shutting off the fuel
The fuel fills the float bow and eventually pours out f tha bowl vent which is on the engine side of the carb
Because the carb has a slight downdraft the fuel flows bown the manifold past the inlet vales and into the cylinder
Fron then it drains slowly past the rings and fills the sump, diluting the oil and overfilling the sump
When the piston goes down it compresses what ever is in the sump and forces through the crankcase breater tube that goes into the air filter .

A very very very very very very very very common problem