If the head/s get too hot too touch shut it down.
Until it runs out of fuel
No harm at all running it on the hose for long periods, just make sure there is enough water pressure to keep
Thanks for your comments, wajiira
I feel much better now that I know where that oil came from
that hose from intake silencer,it drain some oil from the silencer which accumulate from the breather hose, if it is too much oil, you have to worry,during
did you found broken blade ?