Rotax 912 uls with 830 hours. Compression 80/63 80/68 80/68 80/69 on hot and cold engine. Last year #1 80/64 and all others in 70s. No oil burn or any issues at all. Manual says 25% acceptable or 80/60. Most people show compression in high 70s. Should I be concerned? Still learning rotax engines.
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