Gary, when I said clevis, I was refering to the connector from the cable to the engine's throttle arm. Looking at your picture with a metal ez-link attached to the metal throttle arm, that could be the cause or a contributing factor. What you might do is solder a DuBro threaded solder stud to the cabel and use a nylon clevis to connect it to the throttle arm. This will eliminate metal on metal. I use an ez-link at the servo end of the cabel to allow the connection to be adjusted for length.

Bruce