need help on identifying a motor part

[jfields]

I need a part and wondering if anyone here has one for sale or at least can tell me what it is called. In the pic below it is under number 11 and it looks like number 15 screws into it. I would really appreciate any help. This motor is a 1984 evinrude 15 hp model e15rcrm.

[mike11]

Number 11 is the cam follower roller & number 15 is the cam follower hope this helps