Vertex Omega 150 - not skimming as usual

[kamloops_reefer]

I rinsed out the foam muffler
have blown air back through the tube (with mouth) all seems to be free and clear. and I believe when that gets clogged it really over skims.


will take apart again, perhaps there is a loose 'O' ring etc. it all comes down to the inconsistent bubbles, so I'm suspecting the motor / needle wheel (again).