Atco commodore b14
 

Could anyone tell me if there is a part missing on the photo below. Something that might hold the carb opening arm to the vertical rod connected to the end of the throttle lever cable and governer.
The mower runs well but only when the carb is operated manually, the throttle adjuster on the handlebars doesn't seem to do much. Many thanks in advance, Jon
http://i657.photobucket.com/albums/u...2/c5991c0b.jpg