Hello!
On my motor it vill blow out of the oilfilling pipe.
The engine takes a lot of oil while using it.
It should be vaccum here instead of blowing.
Can it be a problem with the breathing filter or the reed valve?
i have test the kompression in the cylinders and it shows around 11-12.
Would be thankful if someone can help me out here.
 
Henrik 
Sweden

 Some oil spitting oil out is normal as there's "pulses" as engine components move about.   If it's burning oil and spitting really bad, the piston rings are probably bad. Compression blowing past the rings, then pushing oil out of the crankcase...   A "leak down test" would confirm the issue.
 
What, in PSI is the compression?   Are the spark plug fouled with oil?
 
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Hello!
The PSI was around 140-150.
The sparkplugs looks really bad after 30 hour use.
I have to do a leak down test and se what result i get from this.
Thanks