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Old 05-05-2005, 11:34 AM   #1
Second time around
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needle valve

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I have received a couple of old but new K&B engines .
The small L shaped needle valves are 1-- to short and 2 what stops theses things from falling out . There is no ratchet on them just a small short L shape needle.
Thanks as I know someone will surly have a good answer for this
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Old 05-05-2005, 11:46 AM   #2
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By too short you mean to comfortably get your fingers near them for adjustment? They kept them short to avoid getting broken off - these types of NV's were mainly used on racing engines.

As for keeping them in place, there should be a little hex "cap" with an internal taper that screws over the needle valve body (which is split). As you tighten the cap it squeezes the NV body down and clamps the needle.

If you need a special made longer needle I do have the proper die size (a bit of a pain to find) and proper sized steel wire to make these up. I cant remember the size off hand...
Andrew Coholic -MAAC #26287L

1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's...
if its got a wing or two and an engine - I like it!
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Old 05-05-2005, 12:33 PM   #3
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The addjusters on them have the L shape if there lose just remove the carb ajuster and bend the L shape in and that should fix it.There should be a small ridge on the L that the ajuster would rachet in let me know if that works as the ones I just sold looked fine and work as I checked over them before they were sold.John
If I could fit in my plane I would
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