df6 oil in exhaust water

[weekendwarrior]

Hi,

I tested a DF6 today, idling in a bucket (before buying it...)
There was some oil present in the water in the bucket.
Idling only, I don't know if this might add to the oil in the water.
Is this normal?
I only ask because my understanding of fourstrokes was that they were dead clean?
Otherwise the motor is spotless, it only hunts a little when idling?

Thanks,

[weekendwarrior]

I tested the motor on the water today, and it just wl not rev high enough. I suppose the first possible cause is a high speed jet dirty?