YFA choke pull-off question
#16
07-01-2017, 03:39 PM
Join Date: Nov 2007
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What I would do if no Tag No to get you into the correct settings chart would be to have a parts person look up the carb no. by application and record all the possible I.D.'s so as you can go to the adjustments chart and get within range of how to adjust on the bench and then fine tune from there.
Do you have one of these CHI-COM Specials also?
Thanks for your help.
#17
07-02-2017, 09:06 AM
5th Wheeling
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Location: Edmonton Alberta Canada
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Maybe this will help.
To set up the choke, you need to do it first thing in the morning on a cold morning. 65F, your choke won't stay closed for long. I'm talking 10C and below.
Go out, open the hood. take your breather off. DO NOT PUT POWER TO THE COIL OR TURN THE IGNITION ON.
you adjust the electric coil spring until the choke snaps shut when you push the throttle linkage back. Check it. at 65F, tap the choke. it shouldn't be too tightly set, but will snap back into place. The colder it is outside, the tighter the spring and the harder the choke will close.
Start the vehicle. Should start easily and again, at 65F, come completely off high idle, within half a minute.
To adjust the RPM you have a high idle adjustment screw. use that to get your RPM. This you can do when the engine is warm and at any time.
If your engine, when cold, isn't running properly. Bogs down, stalls, lack of power. than you need to adjust how far open the choke is. On some carbs this is done by bending the linkage. Usually at a factory bend. Other carbs it can be a set screw.
Before all this though, you need to make sure your carb is properly adjusted. If I'm remembering my basics as it's been a lot of years since I worked tune up on gas engines, it's about 1% co2, or something like that, which requires a gas analyzer.
To set up the choke, you need to do it first thing in the morning on a cold morning. 65F, your choke won't stay closed for long. I'm talking 10C and below.
Go out, open the hood. take your breather off. DO NOT PUT POWER TO THE COIL OR TURN THE IGNITION ON.
you adjust the electric coil spring until the choke snaps shut when you push the throttle linkage back. Check it. at 65F, tap the choke. it shouldn't be too tightly set, but will snap back into place. The colder it is outside, the tighter the spring and the harder the choke will close.
Start the vehicle. Should start easily and again, at 65F, come completely off high idle, within half a minute.
To adjust the RPM you have a high idle adjustment screw. use that to get your RPM. This you can do when the engine is warm and at any time.
If your engine, when cold, isn't running properly. Bogs down, stalls, lack of power. than you need to adjust how far open the choke is. On some carbs this is done by bending the linkage. Usually at a factory bend. Other carbs it can be a set screw.
Before all this though, you need to make sure your carb is properly adjusted. If I'm remembering my basics as it's been a lot of years since I worked tune up on gas engines, it's about 1% co2, or something like that, which requires a gas analyzer.
#18
07-02-2017, 10:01 AM
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Maybe this will help.
... Before all this though, you need to make sure your carb is properly adjusted. If I'm remembering my basics as it's been a lot of years since I worked tune up on gas engines, it's about 1% co2, or something like that, which requires a gas analyzer.
... Before all this though, you need to make sure your carb is properly adjusted. If I'm remembering my basics as it's been a lot of years since I worked tune up on gas engines, it's about 1% co2, or something like that, which requires a gas analyzer.
#19
07-02-2017, 10:18 AM
Maybe this will help.
To set up the choke, you need to do it first thing in the morning on a cold morning. 65F, your choke won't stay closed for long. I'm talking 10C and below.
Go out, open the hood. take your breather off. DO NOT PUT POWER TO THE COIL OR TURN THE IGNITION ON.
you adjust the electric coil spring until the choke snaps shut when you push the throttle linkage back. Check it. at 65F, tap the choke. it shouldn't be too tightly set, but will snap back into place. The colder it is outside, the tighter the spring and the harder the choke will close.
Start the vehicle. Should start easily and again, at 65F, come completely off high idle, within half a minute.
To adjust the RPM you have a high idle adjustment screw. use that to get your RPM. This you can do when the engine is warm and at any time.
If your engine, when cold, isn't running properly. Bogs down, stalls, lack of power. than you need to adjust how far open the choke is. On some carbs this is done by bending the linkage. Usually at a factory bend. Other carbs it can be a set screw.
Before all this though, you need to make sure your carb is properly adjusted. If I'm remembering my basics as it's been a lot of years since I worked tune up on gas engines, it's about 1% co2, or something like that, which requires a gas analyzer.
A cheater step to adjust for cold weather is to put the choke cap in the old lady's freezer.
Used to be...
...a choke setting kit that shot freon through the choke housing to do the same thing. I was usually on a budget.OH! When you go to the fridge to get the cap, also pull out a cold one for medicinal purposes if you cut your hand or something...
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