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Old 07-31-2019, 04:34 PM   #11
51 MERC-CT
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Join Date: May 2010
Location: East Hartford, Ct
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Default Re: method for verifying fuel pump output volume

Quote:
Originally Posted by fsacht View Post
Started this thread because was trying to isolate a steady regular miss while in second gear about 20 mph. Sound and feel was fuel starved but chock had no effect to improve miss. Satisfied fuel pump performance and while reinstalling the fuel tube to engine discovered that the tube nut at the carb end has a crack that runs from the compression ferrule to the hex of the nut. I'll install a new tube and see if that is the root cause.

Thanks to all for the helpful suggestions.

Don't know if you have a glass filter bowl, but if so, a cracked or loose bowl gasket will cause similar symptoms by sucking air.
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