Kyle, If you look at the fuel bowl picture you posted you will see that the bowl has an opening for the ball to seat against and a metal bail to trap the ball in a fixed location.
When the accelerator pump depresses the diaphragm the ball seats and the fuel travels out of the pump cavity to the accelerator pump squirter.
The newer bowls do not use the ball and seat arrangement. They have a bowl with a stem hole and several feed holes. When the pump diaphragm moves downward because of the spring inside the pump cavity fills. When the accelerator pump compresses the pump diaphragm the fuel travels to the shooter.
Your bowl has NO CAPABILITY to use the orange umbrella seal because if you removed the ball and retainer and tried to install the orange stem, where would the fuel come from? you have blocked off the hole where fuel used to enter the pump cavity.
Forget about using the orange seal on the older ball and retainer type bowls. Those old pump systems work fine for most applications.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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