I have benn trying to get an Evolution 61 engine to run properly and keep running. The only way I can make it through an entire flight without it starting to shut down, is to make it run so rich that I am only getting 10.5 K on an APC 12-6 prop. It pases the nose up test but not the pinch fuel line test. When I richen it up enough to pass that test and it keeps running but only at about 10.5 k. The problem is not the fuel tank, lines, or pick up because when I replace it with a TH 75 engine on the same plane it runs great. Any ideas would be appreciated?
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