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Air leak?

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Old 03-09-2011, 03:29 AM
  #1
cswtornado
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Default Air leak?

I was trying to fire up my VX-18 yesterday, and I got it running great, but then after a couple mins it just leaned out and quit. I couln't start it again. However, I noticed there was fuel leaking out of the HS needle. There's the problem. How do you seal the HS needle without ruining the threads, do you just put a lil on the threads and screw er back in?
Just as an FYI the backplate is also leaking :/
Like a sieve.

Gotta order some sealand xD
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Old 03-09-2011, 12:03 PM
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foxys
 
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Default RE: Air leak?

I use associated green slime to seal needle valves. Where on the backplate is it leaking? Is it where the shaft comes through or the outside?
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Old 03-09-2011, 01:21 PM
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cswtornado
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Default RE: Air leak?

Yeah, I did some more research and found green slime was the stuff. Basically it leaks all over.... No problem. I'll seal it at the same time as my Picco .28. Nice couple lol

Picco .28  VX .18

haha lol
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Old 03-09-2011, 01:38 PM
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Default RE: Air leak?

+1
Have used green slime my self on the needle valves and I use Permatex High- Temp Red RTV silicone gasket maker on the back plate and the the carb where it inserts into the crank case and have not had any issues with leaks.
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Old 03-10-2011, 05:52 AM
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codokas
 
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Default RE: Air leak?

There is a O ring seal on the HS needle,they go bad and have to be replaced
Backplate-either the gasket is leaking or the bushing is wore out and it has to be replaced
DOUG


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ORIGINAL: cswtornado

I was trying to fire up my VX-18 yesterday, and I got it running great, but then after a couple mins it just leaned out and quit. I couln't start it again. However, I noticed there was fuel leaking out of the HS needle. There's the problem. How do you seal the HS needle without ruining the threads, do you just put a lil on the threads and screw er back in?
Just as an FYI the backplate is also leaking :/
Like a sieve.

Gotta order some sealand xD
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Old 03-10-2011, 06:41 AM
  #6
cswtornado
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Default RE: Air leak?

Don't think the VX-18 even has a backplate gasket...
Its a crappy chinese engine... But I'll make a gasket, no biggie... As long as it runs.
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