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  #1  
Unread 06-02-22, 02:57 PM
Jerry De Santis's Avatar
Jerry De Santis Jerry De Santis is offline
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Engineer rumbles on

P337G N34EC
GOt a problem: on front engine when mixture in is at cut-off to stop engine it keep rumbling on. To stop engine I have to shut master off. Any ideals out there what the problem might be?

Thanks!
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  #2  
Unread 06-02-22, 05:30 PM
GAdams GAdams is offline
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Smile Mixture cable

Itís likely the cable which connects the in cockpit mixture control and the fuel on the engine has either stretched beyond the cutoff limit or the attach point of the cable has come loose or out of adjustment. Could be something else but I would start there. Or it Could be the engine is just as stubborn as itís owner. To turn it off youíll have to shoot it.
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  #3  
Unread 06-03-22, 09:40 AM
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Jerry De Santis Jerry De Santis is offline
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Rumbling on

Thanks for the feed back. Should find out today if we need to investigate the cable in more detail. The FBO working on it didn't think it is the problem. They are almost as stubborn as the owner.
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Unread 06-03-22, 10:21 AM
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SteveG SteveG is offline
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The position of the master switch should have no bearing on whether the engine runs or not. Or did you mean that you are turning the ignition switch off to stop the engine? If the master switch kills the engine ignition you have a second problem to solve as well as the fuel cut-off issue.
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  #5  
Unread 06-03-22, 10:29 PM
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Jerry De Santis Jerry De Santis is offline
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Turning ignition switch off to kill engine.
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  #6  
Unread 06-05-22, 12:26 PM
Dan schultz Dan schultz is offline
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Jerry

If the electric boost pump is off, pulling the mixture provides complete fuel cutoff.
If the motor continues to diesel, I suspect the problem is internal to the engine driven fuel pump.

Dan
N67S
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  #7  
Unread 06-08-22, 02:24 PM
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Jerry De Santis Jerry De Santis is offline
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Turned out to be the engine driven fuel pump. Initially the FBO sent it in for repair and the repair station sent it back saying nothing wrong with it. Problem continued. The FBO decided to take fuel pump off of rear engine and install on front engine. Problem gone. Original fuel pump being sent back out for repair. Will keep you informed of result and repair station.
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