912ULS Engine Failure

Balance weight at 180 and 170 degrees each weighing 14.5 grams. This removed 0.68 IPS for a final balance of 0.01 IPS that clocked around the prop. Basically noise.

#4 Top Plug -1 #4 top -2 #4 bottom -1 #2 bottom -4 #4 bottom -5 #2 top -3 #2 top -4 #2 head #2 cylinder #2 piston #2 piston All four intake manifold O-Rings no evidence of pinch or malformation Left hand carb flange O-Ring - in place and no evidence of misalignment. Carb flange O-Ring - left hand - no signs of pinching or misalignment Carb flange O-Ring - left hand - no signs of pinching or misalignment

Here's some of the data from the EFIS

Well Rotax - what's your next guess

Took the engine down to California Power Systems to have Bryan witness the tear down. Bryan has been the only sympathetic ear in this whole adventure so far.