Reply To: 1938 opposed twin Thor

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May 19, 2026 at 12:52 pm #319311
nabmd
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    I have 2 of these motors, 1 of which I’m working on now. Serial # 03883, 04490. My first one runs well with the needle valve only open 1/16 – 1/8th turn open! It is a fairly ‘blunt’ needle valve, (not having a long taper). I use 16/1 fuel mix.