Originally Posted by Graplr

Have you checked for air bubbles in the return line yet? I suggested in an earlier post to put clear (opaque) fuel line to check for air bubbles. Just get some 5/16" poly line from just about any parts store, Wal-Mart, Farm Supply, etc. It is often blue or pink and you can easily see fuel passing through with a flashlight. Rev the engine with the linkages and check to see if you have air.