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Old 10-28-2013 | 08:54 AM
  #47  
Truckracer
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Originally Posted by j_keiter
What a coincidence. I just measured my side exhaust dle 20 timing this morning with sensor bracket at center I got 30 deg timing. Since the rear exhaust is newer model I wonder if dle is going to stick with the 35 deg timing for all future engines? I prefer 30 or less. Did have some lean out dead sticks while flying inverted on my Yak with side exhaust dle 30cc at 35 deg timing. Moved timing from 35 to 30 and still noticed lean when inverted but never died. I've got another hour of time flying Imac and no more dead sticks with timing at 30. I can only guess the 35 ran just a llittle hotter such that it died when leaned. This is all speculation of course. Be nice if carb would not change mixture due to G-force but that is another issue. I have run diaphragm pressure tube into fuse. It's not a change in pressure issue. I'm leaning towards g-force acting on fuel regulator diaphragm. Only way to know is if someone mounted the dle sideways instead of the inverted config I have. Sideways would leave the diaphragm running parallel to the G-forces. Anybody?
If G forces are causing your problem, increasing the pop off pressure in the carb can help that issue. Do that by either slightly stretching the spring under the forked lever in the carb or stronger springs are available from Walbro. This usually only helps if the pop off pressure was too low or marginal to begin with.