Primer Bulb

I have a lawnboy push mower model #10684. The primer bulb has rotted off and I need some help
replacing it. The bulb is in the side of the carb and I don't see any way of getting the old one out.
I've done many web searches but can't find my modle repair instructions.
Any help would be welcome.

Thanks

It is in the filter cover but be careful if you try to get it out there's a ring holding in in use a screwdriver to get it put