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TD .049 Carb body retainer nut.
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TD .049 Carb body retainer nut.
Cribbs74 Fri Jan 17, 2014 8:09 pm
Weird thing happened to me, I was flying this evening and at the top of a F8 outside loop the engine locked up. As I was gliding down I watched fuel dumping out of the venturi so I knew it had fuel. I was thinking broken crank or rod.
Turned out the carb body retaining nut worked it's way loose and jammed up the driveplate.
A few mins later I was in the air again, but I wanted to relay the story. I never check the tightness on that thing and now maybe I will!
Ron
Turned out the carb body retaining nut worked it's way loose and jammed up the driveplate.
A few mins later I was in the air again, but I wanted to relay the story. I never check the tightness on that thing and now maybe I will!
Ron
Cribbs74- Moderator
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Re: TD .049 Carb body retainer nut.
Jason_WI Fri Jan 17, 2014 8:13 pm
Flying in cold weather the Delrin maybe shrunk to where the retainer nut came loose. Unless you are using the aluminum carb body.
Jason
Jason
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Re: TD .049 Carb body retainer nut.
Cribbs74 Fri Jan 17, 2014 8:18 pm
Possibly, it was in the high 40's though. I did fly in the 30's a while back so maybe it happened then and slowly loosened today. Scared the crap out of me.
Besides the tach race engine I have never broken a Cox.
Ron
Besides the tach race engine I have never broken a Cox.
Ron
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Re: TD .049 Carb body retainer nut.
RknRusty Fri Jan 17, 2014 9:54 pm
Hmmm, guess I'll check mine next time I fly. I'm glad it quit in a position where it had enough momentum to glide in for a landing.
Rusty
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Re: TD .049 Carb body retainer nut.
Cribbs74 Fri Jan 17, 2014 10:02 pm
No doubt, timing was perfect. Landing was smooth as well. Even if fuel was dumping out of the venturi!
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Re: TD .049 Carb body retainer nut.
Ken Cook Sat Jan 18, 2014 5:46 am
Ron, this happens a bit. I've had it happen several times. It certainly sounds like the engine seized. I've use Teflon tape to stop that from happening as I had one that would do it frequently. I lapped the collet down a bit so that the crank projected a few thou in front of it. I believe the phenolic washer on mine was grabbing the collet and loosening it. Ken
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