10515 lower oil seal

I'm attempting to replace the lower oil seal on my 10515. It looks like the something is missing as the seal slides onto the crankshaft but there is nothing to hold it in place as the opening is much larger than the OD of the seal.
Here is an image copied from another thread with the same problem:

lbseal.png



It looks like the bearing is missing although the engine has never been disassembled, am the original owner.
Thoughts, ideas anyone?

Thanks,
John

Attached Images

• lbseal.png (13.9 KB)