I have bought a few new aftermarket caps for $7, then they were $15... too much as they all perish after time. It's only a primer, so I used a piece of tubing to first blow then suck to get some fuel to prime. It worked. Then I put a Brigs & Stratton primer bulb in, had to be careful pushing it in, and it's not glued or melted in. But it hasn't come out and has lasted a year. I felt ripped off. speedy
........................Keep your blades sharp......................