Hi all,

I'm in the middle of a full engine rebuild. When I removed the oil pump, there was some huge chunk of rubber sitting around the shaft inside the cases. As far as I am aware that is not meant to be there right? The oil seal was also missing from the bottom of the oil pump that seals the shaft. I think the previous owner must have used this piece of rubber to try and stop 2 stroke oil making it's way into the cases in lieu of the correct seal? There was also a washer which looked like it had been used as a shim at the bottom of the oil pump shaft (similar to how there is a washer used as a shim on the water pump shaft).

So my questions are these:

Is there meant to be a shim there? I can't see anything on the parts diagram or in the workshop manual that would suggest there is meant to be? I'd be worried about it making it's way into the cases.

Does anyone know of the part number for a replacement seal that seals the shaft where it comes out of the oil pump?

Much obliged,
Jim

By the way. I went ahead and had the cases wet blasted while I had them apart. I know it's a bit over the top considering most of the engine is hidden behind the fairingsa but the result was still very much to my liking. Photo attached.