I have an Exmark Lazer hp. Has a 21 HP Kawasaki engine and the trouble I am having is when I do a lot of turning (going around trees, shrubs etc), the fill cap on the hydraulic tank will spew out oil and the oil will then drip on the exhaust pipe and smoke quite a bit. I have ask my dealer several times for help and so far he has no answer. The mower has 90 hours on it and this has been going on for sometime now. I have changed the hydraulic filter and oil..no help. Does anyone have any ideas?