John McCann works on his snowmobile engine Wednesday in Buckfield. “I am tearing it apart to make sure it is perfect,” McCann says, while considering if the Rotax 670 engine would be suitable for his ultralight airplane. “Everything is going to have to be perfect.” If not, the motor will be put back into his Ski-Doo MXZ snowmobile. Daryn Slover/Sun Journal

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