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sticky needle valve

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wiscdave

12-06-2005 09:48:54

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I have a 424 with a sticky needle valve in the carb. It does not stick every time, but when it does, it dies in about 1 min of running. It has just had a new needle valve put in a year ago (20-30 hours) the gas is fresh, the carb just cleaned, ...etc.Are the valves with rubber tips junk? Or is there a trick I am missing?

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wiscdave

12-07-2005 07:23:31

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Re: sticky needle valve in reply to wiscdave, 12-06-2005 09:48:54

Thanks Guys, I tried the tapping trick for the carb and it worked pretty good.

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Nat

12-06-2005 11:32:40

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Re: sticky needle valve in reply to wiscdave, 12-06-2005 09:48:54

Smack the carb with a big rock enough times, and you'll scare it into working right... I kid you not.

When I got my H, the original needle leaked like a sieve. No hope of recycling that one. Got a new all-brass needle from the local CIH dealer, put it in, ran good. A couple months down the road, it started sticking at odd times, until finally it would only run about a minute. Dad got fed up, took a big rock, and gave the carb a good tap. Ran good, but the needle stuck the next time we started it up. Another tap with a big rock, and it was good. Last time I ran it, he was standing there with the rock, we counted to 60, and... didn't miss a beat :) Hasn't died from a stuck needle since.

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gene bender

12-06-2005 10:10:21

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Re: sticky needle valve in reply to wiscdave, 12-06-2005 09:48:54

One reply on this site said awhile ago he gives them a small tap when installing to seat the rubber tip.

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RustyFarmall

12-06-2005 10:24:15

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Re: sticky needle valve in reply to gene bender, 12-06-2005 10:10:21

I tried that "small tap" trick and ended up tossing that particular needle valve. Some of the rubber tips are good, some are not, and it doesn't make any difference who made the kit or who you bought it from. I prefer to re-use the all steel valves if they will clean up good.

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Allan in NE

12-06-2005 09:54:17

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Re: sticky needle valve in reply to wiscdave, 12-06-2005 09:48:54

I dunno Dave,

Sometimes they work just fine; then, the next will be just like you are experiencing, they will go to actin' up.

I've always liked the straight brass ones, tho.

Allan

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504

12-06-2005 19:24:47

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Re: sticky needle valve in reply to Allan in NE, 12-06-2005 09:54:17

Dave,Two things to do are to take a small file to the sides of the needle valve(the fit inside of the seat is too tight). The other problem with a lot of carbs is the little pull down wire between the needle valve and the float is missing. If you have any dirt or rust in the tank there is not enough room for the needle valve to move freely.

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