I replaced the impeller this weekend on a 85HP 1969 johnson. I never have replaced one before and did it from the manual. Impeller change went fine but there was a gasket between the lower end and the exhaust tube. The gasket was mangled when I removed the lower end. It looks like who ever worked on this moter last got it twisted when the lower end was bolted back up. Anyhow I don't know where to find this gasket or no what the part number is. Can anyone tell me that part number is?<br />Also on one of the bolts that held the lower end on when I removed it the threads were stripped out from inside. This is the bolt from behind the trim tab. Does anyone have any expierence with repairing these threads?