Carburetor issue/help.

[perryjosh64]

This is on a Marvel-Schebler TSX 765 (clone) carburetor on 64 Ford 2000 tractor. Had to replace the gas tank and few other issues and decided to rebuild the original TSX carb so I put the aftermarket carb on until I got done with rebuild. Got everything on ok and got tractor cranked but while trying to adjust the idle and power adjustment settings all of a sudden I can’t have throttle at lowest setting without tractor dying no matter what I do with Idle/power screws? What am I doing wrong and possible solutions?
Thanks

 

[used red MN]

This is on a Marvel-Schebler TSX 765 (clone) carburetor on 64 Ford 2000 tractor. Had to replace the gas tank and few other issues and decided to rebuild the original TSX carb so I put the aftermarket carb on until I got done with rebuild. Got everything on ok and got tractor cranked but while trying to adjust the idle and power adjustment settings all of a sudden I can’t have throttle at lowest setting without tractor dying no matter what I do with Idle/power screws? What am I doing wrong and possible solutions?
Thanks

There is probably some problem with the cheapo carb. Something miss drilled or not drilled where it should be. This is been posted about a few times on here. Other times the carbs are purchased and bolted on a run and work as expected.

 

[RobCons]

Try bumbing the idle speed up until it will run and see what speed your at.

 

[perryjosh64]

Had dummy moment. After searching previous posts found info on the throttle stop screw on the carb throttle arm. Should have figured that out on my own seeing as there are “3 screws w/springs= adjustments”. I do find it funny after reading couple different posts how there are multiple names for the same parts. Anyway got it running now and able to idle around 400-450 rpm’s . Now gotta tinker on why I get poofs of black smoke when I throttle up.

 

[used red MN]

Now gotta tinker on why I get poofs of black smoke when I throttle up.

How severe is the black smoke? It is normal for a tractor carburetor to do this, they have no accelerator pump to momentarily richen the mixture when the throttle is opened so they run inherently rich to help alleviate this. All you can do is lean down the main jet to the point where there is no stumble when you crack the throttle open. Any point you close the main jet below that is a compromise of how lean you want the mixture and how much stumble you can live with when you open the throttle.

 

[perryjosh64]

How severe is the black smoke? It is normal for a tractor carburetor to do this, they have no accelerator pump to momentarily richen the mixture when the throttle is opened so they run inherently rich to help alleviate this. All you can do is lean down the main jet to the point where there is no stumble when you crack the throttle open. Any point you close the main jet below that is a compromise of how lean you want the mixture and how much stumble you can live with when you open the throttle.

It’s just a quick poof as it accelerates then levels out. Now this is all in the garage stationary haven’t got cover back on yet and checked anything under load/working.