I have over 2 hundred thousand mills on it but it just started running bad a few months ago. I thought I had picked up some bad full so I changed the full filter but it did not look bad and did not have any water in the bowl. In the mornings it is very sluggish and it will barely get out of its own way and then it will just take off like not a thing was wrong. It will do it if I stay at the same speed for a bit so I let off the petal for a few seconds and it will take off. Help !!!