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Johnous Samba Member
Joined: August 14, 2014 Posts: 89 Location: Austin, TX
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Posted: Thu Dec 18, 2014 10:03 am Post subject: Solex 30PICT-1 Throttle Butterfly |
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Hey Gang, I am rebuilding a 30PICT-1 from my 1966 sunroof Beetle with the generic kit. The float was sticking and gas was weeping out the sides of the float chamber. The car stunk like gas, and it started like shit in the cold. The car idled quite well before the rebuild so I do not think there is any leakage around the shaft bushing (In fact, it does not look like this has ever been bushed before)
I tried to undo the main throttle butterfly screws but it was far too difficult, and I have decided to soak the carb in cleaner without disassembling the butterfly. I noticed that the main throttle shaft has some resistance when I move it with my hand. I am unsure whether or not I have warped the throttle shaft in my zeal.
Is it normal for there to be some resistance to the movement of the throttle shaft? I can move it, but it is sticky. I want to ensure that I have not done any damage, which may actually require the removal of the throttle shaft...
Thank you for your advice on this. I do not want to damage a perfectly good solex carb that otherwise works, nor do I want to remove the throttle shaft if it is not necessary. |
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itskyle Samba Member
Joined: October 04, 2013 Posts: 634 Location: Plainfield, IN
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Posted: Thu Dec 18, 2014 8:17 pm Post subject: Re: Solex 30PICT-1 Throttle Butterfly |
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Johnous wrote: |
Hey Gang, I am rebuilding a 30PICT-1 from my 1966 sunroof Beetle with the generic kit. The float was sticking and gas was weeping out the sides of the float chamber. The car stunk like gas, and it started like shit in the cold. The car idled quite well before the rebuild so I do not think there is any leakage around the shaft bushing (In fact, it does not look like this has ever been bushed before)
I tried to undo the main throttle butterfly screws but it was far too difficult, and I have decided to soak the carb in cleaner without disassembling the butterfly. I noticed that the main throttle shaft has some resistance when I move it with my hand. I am unsure whether or not I have warped the throttle shaft in my zeal.
Is it normal for there to be some resistance to the movement of the throttle shaft? I can move it, but it is sticky. I want to ensure that I have not done any damage, which may actually require the removal of the throttle shaft...
Thank you for your advice on this. I do not want to damage a perfectly good solex carb that otherwise works, nor do I want to remove the throttle shaft if it is not necessary. |
Point of order here, is the movement still sticky after soaking in carb cleaner?
Kyle _________________ --
69 or 72 Autostick Bug current
66 Bug (We both miss it)
74 SuperBeetle Auto Stick (I miss that car)
73 SquareBack, Straight Stick (Wife misses this one.) |
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61SNRF Samba Member
Joined: March 29, 2009 Posts: 4657 Location: Whittier 90602
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Posted: Thu Dec 18, 2014 8:23 pm Post subject: |
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How much resistance? How much force did you put on them?
From that you must know rebuilding carbs is an Art, becoming a lost one at that, and not a science. Kind of like Zen
Anyway, I'll say sometimes they can get sticky after a cleaning because it takes all the lubrication off the shaft and bushings. Squirt some oil in there and see if it helps.
Another thing, try lightly rapping right on the end of throttle shaft, either side first your choice, with a plastic or wood screwdriver handle. If you have pushed the shaft to one side or the other by tweaking on the screws, this may help to center the blade and find it's "sweet spot" again. _________________ -Bruce
An ounce of prevention is worth a pound of cure. |
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blue77bay Samba Member
Joined: February 11, 2006 Posts: 631 Location: Brisvegas Australia
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Posted: Fri Dec 19, 2014 5:23 pm Post subject: |
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If you buggered up the shaft a bit and after all your efforts its still sticky ,get a dremel with a metal grinding drum and grind the tops off the screws where they have been peened over ,that will enable you to easily remove the screws ,once apart you can easily repair what is needed and simply get new screws ,i am fairly sure they are 4mmin a 30pic _________________ I like hammers. Lots of hammers. Hammers and me go way back.
A large hammer collection is like an instant problem solver
Mark tucker wrote:,wack off as needed |
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Johnous Samba Member
Joined: August 14, 2014 Posts: 89 Location: Austin, TX
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Posted: Sat Dec 20, 2014 3:54 pm Post subject: |
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Thanks for the advice y'all. I was able to get a tad more freeplay out of the butterfly after cleaning and lubrication with some penetrating oil. Furthermore, it was not properly centered as 61SNRF recommended. It is still not totally smooth but seems minor what with the return spring.
After cleaning and reassembly I got it back on the motor and had to mess with the float needle spacing to get the gas flow just right (after the first test drive, gas would drip out of the throttle shaft ends). I tried the ultimate test of blocking the intake orifice while the engine was running. It died straight away, so I will hope that means that there is no major vacuum leak and that the throttle shaft bushings are okay...
All in all, it was really quite fun to rebuild the 30 PICT-1. The previous owner had the motor rebuilt with 1600 components but kept everything else the same. I may look at upgrading to a bigger jet in the near future.
Thanks again for your recommendations |
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dcheek Samba Member
Joined: January 07, 2007 Posts: 511
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Posted: Mon Dec 22, 2014 1:41 pm Post subject: |
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Johnous wrote: |
Thanks for the advice y'all. I was able to get a tad more freeplay out of the butterfly after cleaning and lubrication with some penetrating oil. Furthermore, it was not properly centered as 61SNRF recommended. It is still not totally smooth but seems minor what with the return spring.
After cleaning and reassembly I got it back on the motor and had to mess with the float needle spacing to get the gas flow just right (after the first test drive, gas would drip out of the throttle shaft ends). I tried the ultimate test of blocking the intake orifice while the engine was running. It died straight away, so I will hope that means that there is no major vacuum leak and that the throttle shaft bushings are okay...
All in all, it was really quite fun to rebuild the 30 PICT-1. The previous owner had the motor rebuilt with 1600 components but kept everything else the same. I may look at upgrading to a bigger jet in the near future.
Thanks again for your recommendations |
I had the same problem with fuel leaking out from the throttle shaft. Turned out to be the engine running too hot and would boil the gas out of the float chamber when I shut the car off. Once I started the engine again it would suck the gas back in. Did the same thing when I had the throttle shaft rebushed. Excess heat was the problem. FYI it was a rebuilt engine. All my original engines never had this problem.
Dave _________________ 1961 Bug
1965 Bug
1966 Sunroof Bug
1966 Westy
1976 914 2.0
1989 911 Carrera
1981 Diesel Rabbit Pick Up
1982 Diesel Vanagon
2014 Golf (last year German mfr for NA)
2019 Jetta Gli, 35th Anniversary Edition, 6 speed |
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NewVWFan Samba Member
Joined: September 25, 2005 Posts: 159
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Posted: Mon Jan 26, 2015 4:08 pm Post subject: |
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I picked up a rebuild that had a sticky throttle and choke shaft. Was gritty and stiff. Well after a good tear down, I found blasting media packed in the two check balls and the fuel metering tube. No way this carb would have worked.
I used carb cleaner and compressed air to clean grit out of shafts. Works good now. |
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