According to my handy dandy "Free to You" Service stickers it would be 20.0mm. If it is one of the double bubble floats, be sure and adjust both sides as one side can be off from the other. Sounds like you are running way rich. Also have you seen the free service manuals on line? I have printed our several and see no sense in spending good money on a store bought. Allen just posted some links a bit ago.

Doug - Olympia - Washington
 I don't know how many CTs I have.
Last Edited By: Doug Mar 1 11 8:33 PM. Edited 1 times.