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Setting float level on Weber IDA carbs.
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tufty65
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PostPosted: Tue Jul 10, 2007 1:53 pm    Post subject: Setting float level on Weber IDA carbs. Reply with quote

I have done a search on the forum but i cant find any topics on how to set them, the topics/sticky seems to be for everything but IDAs.
Can anyone let me know what the basic set up is or point me towards a link please.
The carbs are new.
Thanks.
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Eaallred
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PostPosted: Tue Jul 10, 2007 4:35 pm    Post subject: Reply with quote

You can buy the Berg tool for setting the float level, or, if you know someone that has a set of IDA's with the correct float level, you can use a small rod to check the float level through the inspection port on top of the carb. It's about 1/16" diameter hole in the top of the carb. I can't remember the measurement of what it is supposed to be with this method.
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akokarski
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PostPosted: Tue Jul 10, 2007 7:28 pm    Post subject: Reply with quote

there is a good article on aircooled

http://www.aircooled.net/gnrlsite/resource/articles/48idarebuild.htm
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VWXTC4FREE
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PostPosted: Tue Jul 10, 2007 8:19 pm    Post subject: Reply with quote

Im still not getting it how do you use the tool I made one according to the weber manuel but dont get it .how do you know it is hitting the needle valve and when it is open and closed?
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tufty65
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PostPosted: Wed Jul 11, 2007 1:16 am    Post subject: Reply with quote

akokarski wrote:
there is a good article on aircooled

http://www.aircooled.net/gnrlsite/resource/articles/48idarebuild.htm


Ahhh forgot about those tech articles.
Thanks thats just what i was looking for. Wink
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tufty65
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PostPosted: Sun Jul 15, 2007 1:33 pm    Post subject: Reply with quote

The aircooled tech section is good but it doesnt show you how to measure and what it should be.
Plus i dont have a berg tool and cant get them this side of the pond.
I looked in the weber tech manual and that has no sign of how to or what measurment.
I have a set of vernier calipers to measure with.
Is there anyone who could walk me through this.
I know you set them 5.5 -6 mm but where/how????
Any help appreciated. Wink
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akokarski
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PostPosted: Sun Jul 15, 2007 1:43 pm    Post subject: Reply with quote

http://www.carburetorclinic.com/setup.htm
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PostPosted: Sun Jul 15, 2007 2:14 pm    Post subject: Reply with quote

VWXTC4FREE wrote:
Im still not getting it how do you use the tool I made one according to the weber manuel but dont get it .how do you know it is hitting the needle valve and when it is open and closed?


Refer to the pic in the ACN article about 2/3 down the page showing the use of the tool against the float. What you can't see is in the background, there's another tool that sets the distance from the carb top to the tab on the float that actuates the inlet valve. With that distance set, the float should sit above the carb top by 5.5-6mm. I will try to remember to get a better pic of what the tools are like.
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tufty65
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PostPosted: Mon Jul 16, 2007 8:17 am    Post subject: Reply with quote

akokarski wrote:
http://www.carburetorclinic.com/setup.htm

Thanks for the link but thats for idfs mine are idas and the float is secured in the base of the carb not on the top piece so different to measure???
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tufty65
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PostPosted: Mon Jul 16, 2007 8:18 am    Post subject: Reply with quote

Bruce wrote:
VWXTC4FREE wrote:
Im still not getting it how do you use the tool I made one according to the weber manuel but dont get it .how do you know it is hitting the needle valve and when it is open and closed?


Refer to the pic in the ACN article about 2/3 down the page showing the use of the tool against the float. What you can't see is in the background, there's another tool that sets the distance from the carb top to the tab on the float that actuates the inlet valve. With that distance set, the float should sit above the carb top by 5.5-6mm. I will try to remember to get a better pic of what the tools are like.


Yes that would be helpful thanks Wink
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Bruce
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PostPosted: Wed Jul 18, 2007 6:05 pm    Post subject: Reply with quote

Here are the tools I made:

Image may have been reduced in size. Click image to view fullscreen.


The tool on the left is used to set the distance from the carb top to the tip of the inlet valve like this:

Image may have been reduced in size. Click image to view fullscreen.


The distance is set by changing the thickness of the gasket between the valve and the carb top. Spec is 25.0mm.

The tool at the far right of the top pic is used to set the distance from the float's tab to the carb top. Although my tool looks adjustable, it is only adjustable to get the setting according to Weber's spec, 24.2mm. Here it is installed:

Image may have been reduced in size. Click image to view fullscreen.


Then when the carb is turned upside down, the float "rises" to touch the tool like this:

Image may have been reduced in size. Click image to view fullscreen.


Finally, the last tool is used to measure how much above the carb top the float rises to:

Image may have been reduced in size. Click image to view fullscreen.


Note the slot machined in it. This is to clear the seam of the float. The tool has this machining on both sides, one is machined so the step is 5.5mm, the other is 6.0mm. The spec is to have the 5.5 touch the float, and have a gap for the 6.0 side.
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PostPosted: Wed Jul 18, 2007 8:00 pm    Post subject: Reply with quote

Thanks,Bruce .That is exactly what I needed.Those tools are nice and the pics and instuctions were AWESOME! The float depth tool that they dont show in the manuel is what was stumping me.
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tufty65
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PostPosted: Thu Jul 19, 2007 5:34 am    Post subject: Reply with quote

Yes thats it Exclamation
Very good to see the specs clearly.
excellent now i can go and set mine.
Thanks for posting that up. Cool
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PostPosted: Fri May 04, 2012 9:35 am    Post subject: Reply with quote

Should i measure with or without gasket?
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PostPosted: Fri May 04, 2012 9:44 am    Post subject: Reply with quote

Wow - I have done IDFs a few times, but I need to do the IDAs on the'vert here very soon.

I don't have any of those tools - and didn't think beforehand about hte float not being on the carb top but in the body.

Always something . . . .
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PostPosted: Fri May 04, 2012 11:58 pm    Post subject: Reply with quote

Mohawk wrote:
Should i measure with or without gasket?

You set them without the gasket.

Two points for guessing how thick the gasket is supposed to be:

Bruce wrote:
The distance is set by changing the thickness of the gasket between the valve and the carb top. Spec is 25.0mm.

...... Although my tool looks adjustable, it is only adjustable to get the setting according to Weber's spec, 24.2mm.

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PostPosted: Sat May 05, 2012 2:46 pm    Post subject: Reply with quote

Heres a good link. I use a micrometer and from the tab that hits the ball should be .200" This is how Jaycee showed me. Its hard to explain but you might figure it out. You can use a micrometer to measure the other way as well.

http://webers.ru/docs/weber/WeberFloatlevelinginstructions.pdf
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PostPosted: Sun Mar 03, 2013 4:31 pm    Post subject: Reply with quote

And the Float spring ( 98013.800 ) says to put in side...have difference if not put? If I dont have :roll:
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PostPosted: Fri Aug 23, 2013 8:10 pm    Post subject: Reply with quote

With the tools in the pics above, I also made the float spring. Never use it though. I just hang the carb upside-down and measure the 5.5-6mm float height.
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PostPosted: Mon Jul 18, 2016 9:06 am    Post subject: Re: Setting float level on Weber IDA carbs. Reply with quote

I'm finally checking my new 48s, an old redline kit I bought years ago (unused). The floats are very high out of the box (kinda expected that). When I invert the carb body and use the tool to see how far the float goes up (to the 5.5 spec) I also find that the float will go NO LOWER than that point. I cannot find any spec on the float drop for the 48 IDA. A few references to checking the rise and drop, but no spec of the actual drop.

In other words, when I adjust the tang on the float so that it only rises 5.5 above the body, it will essentially become stationary - there is no drop from that point. I see the other tang for adjusting float drop, but no idea how far to take it?
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