S&S Super E Mixture Screw Broken and Stuck
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S&S Super E Mixture Screw Broken and Stuck
I just picked up a new to me S&S Super E carb from a swap meet. When I got it home, I started tearing it apart to rebuild it and noticed that the idle mixture screw tip is broken off and poking through the carb throat. I don't know why I didn't notice this before buying it. I know to look for this, but I didn't. I must have been distracted.
I tried tapping the tip of the screw back into the hole, but it just bent. I'm thinking I will carefully grind the visible and now bent screw tip down to the carb throat level and then heat the carb body by boiling it and then get a pick to push the screw tip out.
If I'm successful in getting it out, What are the chances of fixing the now larger hole that is there? Is the carb body now just junk? Has anyone come across this and was to able to fix the larger hole for the mixture screw tip when someone cranked the mixture screw down too far? Is there a larger diameter tipped mixture screw that someone makes? Any ideas?
I tried tapping the tip of the screw back into the hole, but it just bent. I'm thinking I will carefully grind the visible and now bent screw tip down to the carb throat level and then heat the carb body by boiling it and then get a pick to push the screw tip out.
If I'm successful in getting it out, What are the chances of fixing the now larger hole that is there? Is the carb body now just junk? Has anyone come across this and was to able to fix the larger hole for the mixture screw tip when someone cranked the mixture screw down too far? Is there a larger diameter tipped mixture screw that someone makes? Any ideas?
Last edited by Triple-A; Mar 26, 2023 at 08:13 AM.
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Joined: Mar 2014
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According to S&S, "Over tightening idle mixture screw may cause irreversible damage to carburetor body." 510-0251_super_eg_series_shorty_carbs.pdf (revzilla.com) page 5, upper left
Last edited by joe40x; Mar 31, 2023 at 08:23 PM.
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Joined: Jun 2015
Posts: 10,291
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From: West Central FL
I just picked up a new to me S&S Super E carb from a swap meet. When I got it home, I started tearing it apart to rebuild it and noticed that the idle mixture screw tip is broken off and poking through the carb throat. I don't know why I didn't notice this before buying it. I know to look for this, but I didn't. I must have been distracted.
I tried tapping the tip of the screw back into the hole, but it just bent. I'm thinking I will carefully grind the visible and now bent screw tip down to the carb throat level and then heat the carb body by boiling it and then get a pick to push the screw tip out.
If I'm successful in getting it out, What are the chances of fixing the now larger hole that is there? Is the carb body now just junk? Has anyone come across this and was to able to fix the larger hole for the mixture screw tip when someone cranked the mixture screw down too far? Is there a larger diameter tipped mixture screw that someone makes? Any ideas?
I tried tapping the tip of the screw back into the hole, but it just bent. I'm thinking I will carefully grind the visible and now bent screw tip down to the carb throat level and then heat the carb body by boiling it and then get a pick to push the screw tip out.
If I'm successful in getting it out, What are the chances of fixing the now larger hole that is there? Is the carb body now just junk? Has anyone come across this and was to able to fix the larger hole for the mixture screw tip when someone cranked the mixture screw down too far? Is there a larger diameter tipped mixture screw that someone makes? Any ideas?
Last edited by Hey Man; Apr 1, 2023 at 12:02 PM.
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Joined: Dec 2005
Posts: 19,936
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From: poway
It's possible that it was just broken off from handing. Take it to a machine shop and see if they can remove it..
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Intermediate
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I called S&S. They said if I can get the broken tip out, there is a chance it will still work fine with another screw. It may just have to be screwed down more so the tip sticks through the carb throat and it shouldn't hurt anything that way...if it can be tuned that way. It's just a simple hole. No, they don't make a larger screw.
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