Yes it will. The diapharms do go south after a while, on both petcocks and pumps. I replaced my pump earlier this year when I noticed the inside of the vac line was wet. Scooter ran fine, but, when restarting a warm engine, like after a 15 minute coffee stop, just a little bit of throttle was needed. Thinking I needed a new auto enricher, I started poking around and found the wet vac line.
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