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We're running a 912 ULS, twin Bing carbs, about 46hrs since new.

On two occasions recently, going through power check before a flight, returning the throttle to idle, the engine cut.

OAT just above freezing, and wet grass (frost having melted).

Possible reasons could be Carb Icing / Carbs needing balancing / OAT around freezing but would appreciate any other ideas. Oil temp was above 50C.
  • Re: 912 ULS cutting at low temps?

    by » 9 years ago


    First let us ask, What is the idle rpm you are returning to? Is it too low? Is this a new occurrence that just popped up? Has there been any recent maint. performed? Have the carbs been synced to see if there is an issue? This is one reason I like gauges over electronic sync tools. You can diagnose with them.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


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