My impeller clearance varies from less than .020 to over .027 in different spots along the liner. If I rotate the flywheel the clearances stay the same along the liner. Almost as if the liner is worn or warped in those spots. If the shaft was bent the clearances would follow the impeller as it turns, same should go if the impeller blades were worn. Make sense? I inspected the liner when we rebuilt the motor (1994 Johnson 50/35) and all looked good. I don't think I did, but maybe I missed something. Any other ideas of why the clearance varies so much along the liner?