Carb sync. EGT difference
in 912 / 914 Technical Questions
14 years ago
I have a new 912uls2 that I started up for the first time couple of days ago. I did the pre-carb setup on the throttle settings backed off the idle adjustment to .004 and turned in 1.5 turns on both. Set the Idle air in all the way and then out 1.5 turns. Adjusted the throttle cables so that they both hit full throttle at same time. I have installed EGT's on all four cylinders about 3.5 inches from the flange, Now rolled aircraft out and hit boost pump to prime system and fill carbs, applied full choke and to my surprise it started on about the third blade of rotation. Idle was a little high so adjusted stops to about 1750 rpm. I bought a carb mate and had it hooked up and adjusted till I had green in middle before start. I advanced the throttle to about 4000 rpm and adjusted the cables to get even vacuum in both carbs. Now the problem is the left bank is running about 150 degrees hotter than the right and after getting the carbs sync with the carb mate, when I go full throttle only one throttle will hit the full throttle stop and the other is off about .040. The temp difference is a concern to me. Having only one carb hitting the full throttle stop be a concern when the carb mate says they are in sync? Being that this is a new engine I would think the circlip would be set right on the needles? I am really scratching my head on this. Thanks Jim
