Low Manifold Pressure at Altitude

by Bill Donald Lindeman in 912 / 914 Technical Questions 6 years ago

I flew my 914 up to 10,500 the other day and when I pulled the power back to descend I was getting low manifold pressure alarms anytime the power was reduced below 3,500 RPM.

Any thoughts on what is causing this?

Thanks

Re: Low Manifold Pressure at Altitude

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 8k

First time I ever heard of a LOW Manifold pressure alarm.
At 10,000 ft. the ambient pressure is only 20"Hg.
At Idle your MAP could easily be below 5"Hg.
This is just the Laws of Physics.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

Thank you said by: Bill Donald Lindeman

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