Throttle creep

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6673
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Throttle creep

Post by 6673 »

Hi everyone,

My engine RPMs will increase all on their own (e.g. while stationary at idle power) especially at low RPM. I have to have the friction lock tight to prevent this. This is something that recently started happening. I checked the linkage connection and it looks OK.

It's not a rapid surge, but does move if not locked tight.

Nick
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Name: John Kliewer
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Re: Throttle creep

Post by 6863 »

Nick, if you are like me you have a self installed spring which takes your throttle to open should the linkage fail. A spring like that saved my bacon once in a different lifetime while flying over jungle in Africa. If there is a spring installed on your throttle it could be working against a worn friction lock.
John Kliewer

"Make things as simple as possible but no simpler." Albert Einstiein

"Wheels move the body. Wings move the soul."
6673
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Re: Throttle creep

Post by 6673 »

Good point, John. I will take a look.

Thanks.

Nick
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Name: Randy Thompson
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Re: Throttle creep

Post by 6298 »

The throttle lever on the carburetor is pulled back at idle. The weight of the arm would like to be down or at about 3/4 throttle.
From John's experience, I can understand the thought of having a spring. Most don't have one. Your throttle cable is apparently very smooth.
Randy Thompson A&P IA Pilot
Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
Overhaul small Continentals
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Re: Throttle creep

Post by 6673 »

Thanks for the input, Randy.
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