I have a rotax 582 that hasn't been ran for awhile. Out it in the the plane about a week ago and got it started. Every time I run it though after a few minutes I get oil running out the muffler. It also idles rough with a increase and decrease of about 1000 RPM as it idles. I have changed the jets but still seems to be running rich. Any ideas out there. Or had anyone else had this problem