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  1. j3pa

    "Morning roughness" C90 - please advise

    Hello fellow Cub lovers! Really could need some good advise on an engine problem - so it can be sorted out before the 75 year anniversary for D-day in June where we want to fly from Oslo/Norway to Normandy/France! :) I restored an L-4 Grasshopper with a C90 engine that had approx. 3000 hours...
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