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Help with webra TN carb - 1/16/2012 12:49 AM   
cremation101


 

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From: clermont, FL, USA
Status: offline 		I got this webra speed 50 and it runs great. I just cant figure out how the carb barrel is supposed to close so the engine will stop . Instead of having to pinch or pull the fuel line. It will run about 4k for a moment then load up a bit down to just over 3k.

What is the third screw with a spring under it for?



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RE: Help with webra TN carb - 1/16/2012 12:51 AM   
cremation101


 

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Status: offline 		Oops, I dindnt mean to put the same pic three times.

Any one have an idea?


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RE: Help with webra TN carb - 1/16/2012 1:29 AM   
Hobbsy



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Status: offline 		That is the speed adjustment screw and appears to be screwed in too far. Back it out whiel putting a little pressure on the throttle and watch the barrel close. It should be less than 1/32nd" open at idle.

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RE: Help with webra TN carb - 1/16/2012 4:09 PM   
jaka


 

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From: Upplands Vasby, SWEDEN
Status: offline 		Hi!
It's not the speed adjustment screw!

You have the older typ of TN carb and the small screw adjusts the throttle drum position. You must turn it out so you can close the throttle drum with the throttle servo. Simple as that!



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RE: Help with webra TN carb - 1/16/2012 4:37 PM   
Mr Cox



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From: Karlstad, SWEDEN
Status: offline 		I think you are both referring to the same thing, i.e. the "idle speed" or "throttle stop" screw...

The screw needs to come out a bit.

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RE: Help with webra TN carb - 1/16/2012 7:21 PM   
Hobbsy



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Status: offline 		Jan, you just did a repeat of what I said, when you change how far the barrel goes closed you change the idle speed. Simple as that.

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RE: Help with webra TN carb - 1/16/2012 11:28 PM   
cremation101


 

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Status: offline 		Thank you, gentlemen. I went and tried it after reading. It's working good now. Don't have time to go and run it but i got the barrel closed by turning the screw with a spring out a little.


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RE: Help with webra TN carb - 1/17/2012 10:52 AM   
Dauntae



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Status: offline 		I've got that exact same engine and that same carb on it too, Also have that carb on a speed 60 and they run well. Neither of the Webra's like any nitro however (they tend to over heat with nitro) I run them on FIA fuel (0% nitro) and they run great on it and it's much cheaper than the other fuel too. Have fun with that Webra, I love these engines. Need to find a good airframe for the 50 though.

Dauntae

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RE: Help with webra TN carb - 1/17/2012 4:47 PM   
jaka


 

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Status: offline 		Hi!
Webra engines can of course be run on nitro fuel! 5% nitro is just perfect! But of course they run nearly as good on 80/20 fuel (FAI fuel).

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RE: Help with webra TN carb - 1/17/2012 11:50 PM   
NM2K


 

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Status: offline 		I have to pull my older Webra .50 GT out and look at it. It has a TN carb, but which model is a good question. No more Dynamess carbs for me. Once was too many.

A while back I said I wish I had a Webra .32 (right now). I did have two Webra .32, but both were NIB and both were sold to customers. So, I wasn't lying. I did "have" them, but they were just passing through.


Ed Cregger


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