Today I lost a plane do to my Moki 2.10 leaning out. I had just pulled into a hover and about 3-4 seconds later it died. I have been running the engine for about 6 months now with no problems. Today is the first day I ever ran it in the cold. Our high today was
about 43 degrees. I did have to richen the high end quite a bit before I flew it. Is there a solution to this engine running lean when pointed vertical? Someone at my field mentioned a cline regulator.

Greg