Topic: Am I doing this clear tube test right?

[Dos]

Just wanted to get the OK that I’m doing this right.

Is it a coincidence that two and three are about the same just because they are the most and inner carbs? Or are they both just incorrect?

[Don R]

 Turn off the fuel supply, drain some out and locate the clear tube so you don't need to move it. Then slowly turn the fuel back on. Observe the level. Every time you lower the tube, the float adds fuel to fill the tube. Then when you raise it the fuel is trapped there.

[Dos]

So I did it incorrectly and should do what you mentioned correct?

[Gene]

yes.

[Dos]

Got it so bare with me here:

Drain everything out. Locate the hose and watch as the gas fills it.. then while the petcock is still on and the gas has filled all hoses , raise the hoses slightly and then lower back to where it was originally and that will be the correct measurement.

Right?

[markreimer]

I tried the tube version a few times and got inconsistent results. Then i tried the “bowl” method and had great results. One carb body at a time. Take the bowl off and use a glass or plastic bowl. I used a little Tupperware thing. All that matters is that the bowl rises above the carb gasket surface. Turn on the fuel, watch the float slowly go up and stop. It should stop with the fuel about 2-3mm below the gasket surface.

I set the levels using the manual method as per the manual first.

I found I had one float with a bad pin using this technique. It was pitted. Replaced it and I now have four totally even carbs. The other three were bang on from the manual method (just using a ruler set to whatever tha manual said)




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[Yamahawk]

I tried the tube version a few times and got inconsistent results. Then i tried the “bowl” method and had great results. One carb body at a time. Take the bowl off and use a glass or plastic bowl. I used a little Tupperware thing. All that matters is that the bowl rises above the carb gasket surface. Turn on the fuel, watch the float slowly go up and stop. It should stop with the fuel about 2-3mm below the gasket surface.

I set the levels using the manual method as per the manual first.

I found I had one float with a bad pin using this technique. It was pitted. Replaced it and I now have four totally even carbs. The other three were bang on from the manual method (just using a ruler set to whatever tha manual said)




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That's a really great idea, Mark! Now if we could pinpoint the Tupperware bowl SKU hehe or what model # they sell it under, I am sure there are ladies out there that would sell a bunch!
Charlie

[DaveBarbier]

Got it so bare with me here:

Drain everything out. Locate the hose and watch as the gas fills it.. then while the petcock is still on and the gas has filled all hoses, raise the hoses slightly and then lower back to where it was originally and that will be the correct measurement.

Right?

NO! Once the fuel is on, don’t touch the hoses. Get the hoses in place and leave them there. When the hoses are filled with fuel, look at them, don’t touch them.

[Deltarider]

Got it so bare with me here:

Drain everything out. Locate the hose and watch as the gas fills it.. then while the petcock is still on and the gas has filled all hoses, raise the hoses slightly and then lower back to where it was originally and that will be the correct measurement.

Right?

NO! Once the fuel is on, don’t touch the hoses. Get the hoses in place and leave them there. When the hoses are filled with fuel, look at them, don’t touch them.

Why 'don't touch them'?

[DaveBarbier]

Got it so bare with me here:

Drain everything out. Locate the hose and watch as the gas fills it.. then while the petcock is still on and the gas has filled all hoses, raise the hoses slightly and then lower back to where it was originally and that will be the correct measurement.

Right?

NO! Once the fuel is on, don’t touch the hoses. Get the hoses in place and leave them there. When the hoses are filled with fuel, look at them, don’t touch them.

Why 'don't touch them'?

I just said don’t touch because, unless I misunderstood, he thinks he has to raise and lower the tubes once he turns the fuel on. All you do is read the level in the tubes once you turn the fuel on. No raising or lowering. I actually do flick the tube a bit to make sure there’s no trapped bubbles, like a nurse about to stick you with a needle.

[evinrude7]

Got it so bare with me here:

Drain everything out. Locate the hose and watch as the gas fills it.. then while the petcock is still on and the gas has filled all hoses, raise the hoses slightly and then lower back to where it was originally and that will be the correct measurement.

Right?

NO! Once the fuel is on, don’t touch the hoses. Get the hoses in place and leave them there. When the hoses are filled with fuel, look at them, don’t touch them.

Why 'don't touch them'?

I just said don’t touch because, unless I misunderstood, he thinks he has to raise and lower the tubes once he turns the fuel on. All you do is read the level in the tubes once you turn the fuel on. No raising or lowering. I actually do flick the tube a bit to make sure there’s no trapped bubbles, like a nurse about to stick you with a needle.

or a smack addict about to shoot up if that's a better visual.

[DaveBarbier]

I just watched your videos, Dos. The inner carbs are too high. As long as the carb rack is level, it doesn’t matter if you hold it against the outer carbs or the inner carbs. The level will be the same.

I didn’t notice what your fuel source is, but I assume it’s the tank which is right next to it. That works. As others have said, get the tubes in place first before you turn the fuel on. Don’t go moving the tubes about.

So with empty carbs connect the tubes>tape them or something so they’re in a good place to measure the level>turn the fuel on and watch the fuel fill up the tube>measure to be sure it’s the proper distance from bowl seam.

[DaveBarbier]

Got it so bare with me here:

Drain everything out. Locate the hose and watch as the gas fills it.. then while the petcock is still on and the gas has filled all hoses, raise the hoses slightly and then lower back to where it was originally and that will be the correct measurement.

Right?

NO! Once the fuel is on, don’t touch the hoses. Get the hoses in place and leave them there. When the hoses are filled with fuel, look at them, don’t touch them.

Why 'don't touch them'?

I just said don’t touch because, unless I misunderstood, he thinks he has to raise and lower the tubes once he turns the fuel on. All you do is read the level in the tubes once you turn the fuel on. No raising or lowering. I actually do flick the tube a bit to make sure there’s no trapped bubbles, like a nurse about to stick you with a needle.

or a smack addict about to shoot up if that's a better visual.

Haha, true. Just don’t go heating up the fuel in a spoon first.

[slikwilli420]

I tried the tube version a few times and got inconsistent results. Then i tried the “bowl” method and had great results. One carb body at a time. Take the bowl off and use a glass or plastic bowl. I used a little Tupperware thing. All that matters is that the bowl rises above the carb gasket surface. Turn on the fuel, watch the float slowly go up and stop. It should stop with the fuel about 2-3mm below the gasket surface.

I set the levels using the manual method as per the manual first.

I found I had one float with a bad pin using this technique. It was pitted. Replaced it and I now have four totally even carbs. The other three were bang on from the manual method (just using a ruler set to whatever tha manual said)


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This is pure genius and I believe I will never use the clear tube method again because this is easier and doesn't involve all of the uncertainty that seems to surround the tube method. Well done!

[markreimer]

I read about it here somewhere a year or two ago. It’s great! The middle two carb bodies are a bit trickier as your bowl needs to fit in that small space. I trimmed the lip off my plastic clear bowl to make it fit. Anyway, really quite simple and effective. No more overflowing carbs since I did this.


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[tlbranth]

http://forums.sohc4.net/index.php/topic,166447.msg1925188.html#msg1925188

[markreimer]

That’s the thread!!


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