Hi This a 16 Hp self propelled Lesco Blower I could not get it to do it for me today, but the problem is after about running for 3 to 5 minutes. Hdy oil begins to flow out of the vent in the oil cap. This machine is used about 30 to 50 hours a year. I've had it about 8 years and this problem developed out of the blue one day. Since it didn't do it for the camera I'm just wondering what might cause a problem of this nature?