Hi all,
First time back for a while - fun to see familiar names and some new ones...
My 59 +/- cub runs well w/ the choke fully pulled, but as soon as it comes open just a bit, it dies, starved I presume.
I have run the idle adjust screw all in and way out, neither seems to make any difference.
What am I missing?
Thanks,
Larry in IN
May God Continue to Bless America!
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Carb idle adjust - NO JOY
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- Larry in IN
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Carb idle adjust - NO JOY
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- raystractors
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Re: Carb idle adjust - NO JOY
It sound like you have the jet partly blocked. Have you taken the jet out of the side of the carb yet? There are several posts about this trouble if you use the search feature. There is a brass colored nut on the out side of the carb, turn the fuel off and remove this brass nut. This is the jet that I was talking about, then use a small strand of copper wire to clean out the jet, some carb cleaner is also good for this. After cleaning the jet turn the fuel on without replacing the jet. you should get a good full stream of gas thru the carb. If not then you have a blockage somewhere up stream from the carb. Good luck
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Re: Carb idle adjust - NO JOY
raystractors wrote:It sound like you have the jet partly blocked. Have you taken the jet out of the side of the carb yet? There are several posts about this trouble if you use the search feature. There is a brass colored nut on the out side of the carb, turn the fuel off and remove this brass nut. This is the jet that I was talking about, then use a small strand of copper wire to clean out the jet, some carb cleaner is also good for this. After cleaning the jet turn the fuel on without replacing the jet. you should get a good full stream of gas thru the carb. If not then you have a blockage somewhere up stream from the carb. Good luck
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Re: Carb idle adjust - NO JOY
That screw is for the transition from low to high throttle. Starting point is gently all the way in and then 1 1/2 turns out. As suggested, check the main jet.
Bob
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- mva1958
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Re: Carb idle adjust - NO JOY
Don't over-tighten the main jet screw when you reinstall it, it will snap at the middle. Don't ask how I know this... snug it up and open the fuel cock, if it drips tighten it carefully. Don't forget the little washer.
If only Mrs. Hoyt and Mrs. Clagwell had gotten along...
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Re: Carb idle adjust - NO JOY
Does sound like the main jet is partially blocked, I use a cutting torch tip cleaner and carb spray..... the tip cleaner works wonders.
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Re: Carb idle adjust - NO JOY
Don't use a torch tip cleaner. It will enlarge the jet. Use something soft, like a telephone wire.
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Re: Carb idle adjust - NO JOY
Bob McCarty wrote:That screw is for the transition from low to high throttle. Starting point is gently all the way in and then 1 1/2 turns out.
This is in reference to the IH carb, yes?
Do you know if this is also true for the zenith?
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