Thanks Grumpy - I appreciate your time.
I ran the mower for around 20 minutes this afternoon and all seemed to be ok.
However, I am still trying isolate the oil leak - I thought initially it was coming from the oil pan gasket and this was replaced - but after running the mower this afternoon I cleaned up the leaked oil and checked for leaks while the engine was running - I noticed a drip of oil coming off the bottom of a screw on the bottom of the governor control plate - I am not sure how to attack this without taking the governor control plate off.
thanks
pcottam