I previously replaced the oil pump on my MS 170 and it worked for a while, but then stopped. I had an old sprocket/bar/chain on it that needed replacing. So, I continued using it without oil to cut roots and stumps of saplings out of the ground so I can mow over. Now I'm changing the oil pump/sprocket/B&C. I have new everything except the pump. I normally just order a $10 kit off of ebay. Is there a better source?
Also, the spark plug on my Stihl 038 was a Bosch R10. Not original, but was replaced by someone else. Better choice?