I live in a very remote area in the mountains and have a STIHL FS-38 Grass trimmer (strimmer). The end bearing, once removed from the shaft is a steel cylinder in which the drive shaft rotates. The flexible drive is located in a square socket on the shaft. The shaft is held in place from dropping out of the end of the bering cylinder by a ............ (is it a circlip). It has burned out and I don't know what to replace it with.

Does anyone have any idea where I can get this part or the part number?

Also what grease should I use to re-lubricate the bearing and the flexible drive on re-assembly?

I willpost a photo here if necessary but the retaining clip or whatever fits in a groove in the flexible drive end of the rotor shaft.

Many thanks.....