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The air-door tension must then be properly adjusted. If it's too tight, the door won't open under load and the engine will strain. If it's too loose and the door opens too quickly--you guessed it, Quadrabog! If you feel some light-to-moderate resistance when pushing the door open, the adjustment should be about right.
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The air-door tension must then be properly adjusted. If it's too tight, the door won't open under load and the engine will strain. If it's too loose and the door opens too quickly--you guessed it, Quadrabog! If you feel some light-to-moderate resistance when pushing the door open, the adjustment should be about right.  View Related Article