Sprag Clutch and full synthetic oil
in 912 / 914 Technical Questions
9 years ago
I have just replaced the sprag clutch in my 912ULS at about 700 hours. Several others in my area have had to replace theirs also. All of us have been running Mobil 1 synthetic motorcycle oil. The one who has had no problems with the sprag clutch has been running Aeroshel semi synthetic oil. It seems to me there may be a connection to sprag clutch problems and the full synthetic oil. If I understand the operation of the sprag clutch it relies on some level of friction to make the "dogs" move and lock in. Maybe the Mobil 1 is just too slick for the sprag. Has any one else seen a connection to it?? Or suspected it? I found no evidence of lead in the area. I run mostly no-ethanol unleaded mogas. When I am on a long trip and run avgas I alway run tcp.
Thanks --- Lynn
Thanks --- Lynn
