kawasaki fh580v weird problem

[I MOW ALONE]

got a fh580v that is spitting oil from vacuum port on head that the fuel pump vacuum hose hooks up to. engine runs great and plugs look good with no oil or carbon build up. never seen this before thanks in advance

[I MOW ALONE]

anybody out there heard of this problem?

[piston slapper]

replace the hose...if its is loose oil can escape thru the hose.
It may also cause your fuel pump to not pump so good...

[I MOW ALONE]

i did replace hose and put a spring type clamp on it and it still seeps oil out of port.

[piston slapper]

If the hose is snug on the barb on the head.. how can it leak ?
are you sure the oil isnt coming out of the vent in the fuelpump...or a leaking valve cover?

[I MOW ALONE]

no it is seeping out the barb on head i did'nt use a screw clamp just a spring loaded fuel line clamp. i have read that a head gasket may cause this as theres too much pressure in the crankcase causing this. but if gasket was blown i would think engine would smoke or plug would have oil on it and it does'nt

[BigFish]

According to Johnny Walker, and his dear Old Grand Dad, the "vacuum port" is really a pulse port. It alternates 'tween vac. and pressure pulses, to act on the pump diaphragm. If its not sealed good its possible to leak, but I can't remember the last time I ran into one that a new hose/clamp didn't fix.
The best way to check for a blown head gask. is the old leakdown test.