I only seem to post 'curly' questions and this one is no exception.
21B877 engine with oil leaking from Fuel Pump breather.
The fault is NOT caused by any of the following (in order of probability):
Excessive Oil in case
Blocked breather tube / box
Blown Head Gasket
Leaking seals / gaskets etc
Leakdown test shows a typical "used" engine, so yes there is a small amount of blow by and barely detectable valve leakage (at 130 psi).
If you can't think of a solution, don't feel bad, as B&S technical are also starting to scratch their heads. Only think I have not done so far is peak pressure oscillation (case vacuum), but it seems pointless as baseline specs for this engine are not available.
Any thoughts from the guru brigade?
