Hi and thanks in advance for any advice.
I was installing my clutch and fan on a new OS37 for my Rappy 30. One of the screws that holds the clutch to the fan seized in the hole before I even got it tight and the socket head stripped. After trying everything including cutting a slot and using a blade screwdriver I was forced to cut the screw from behind the clutch. The remaining screw thread, probably 3 to 4.5 mm, is in the threaded hole in the fan but cannot be removed. I carefully filed it flush with no damage to the fan. I can mount the clutch using the other two spare holes in the fan.
Will the residual screw thread cause a bad imbalance problem? My plan is to install a set screw in the opposing hole in the hopes of at least removing some of the imbalance. I just don't want to risk bearing damage to the OS37 and obviously don't want a bad imbalance problem. I run a header tank so a little fuel boiling won't be an issue.