Holly 4 barrel carburetor accelerator pump diaphragm replacement. 

It’s so cool when we find that one video that details the same problem we’re having. Thanks a lot

Working in a dealsrsnip service dept all of my working life i have seen doit yourselfers drop small metal parts because of no cover down the intake,be careul

For the people who keep saying Plug the ports. If you look closely you'll see a clear plastic container covering the ports with sides on them

I'd consider putting something over those intake openings. Wonder if ethanol damaged it.

Thanks this helped me out. Why the 30cc vs 50cc?

If you ever make another video you should talk louder. You should have changed the orange diaphram while you were in there!

Finding a supplier with the ethanol, friendly accelerator pump will save you a lot of headaches. Ethanol and carburetors Don’t mix well!