I'm sorry to inform you but your crank is about to break and fail the moment you fire it. Please do not run that engine until you install a proper YR approved "damper" << we will wait for YR to tell us what is OK to install.
Keep safe, install a non explosive thingy on the front of your engine and stay indoors, oh and run for a vaccine for a disease that has a 99.9% survivability rate as soon as its available. J.Rob