CARBURETOR FUEL QUESTION

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auctioneeral

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Went all thru the 4 carburetors, floats adjusted at 15.5mm. Check and same amount coming out each carb bowl.
The question I have is Carburetor rack sitting on work bench with fuel tank 6 foot above the bench. When I take and work the throttle I have no fuel at #1 #2 carbs. But #3 #4 it squirts fuel out toward were the intake boot would be.
So I'm taking that something is not right by #1 and #2 not squirting fuel.
Were would I look to check the reason.
I have no fuel leaks. New O-rings, new accelerator pump and O-ring.
Point in the right directions to check.
 
I've read crossover tubes can be incorrectly installed that would cause this. Otherwise I'd be looking for plugged passages.
 
It doesnt take much to clog the nozzles, I used an old brush spring from an electric motor, It was small enough to poke through the nozzle , I straitened the spring out and clipped it to some hemostats and through the slide cap area poked clear the debris. afterwards I used a piece of vacuum tubing hooked to a blow gun and slipped it over the nozzle seating it to the carb body and blew backwards through the system, pump diaphragm has to be out of course.
Might try blowing backwards first then if clogged try and poke out the nozzle.
 
Ok guy's I'm lost here.
Because I have another junk set of carbs. and I don't see any passages where the fuel can be coming from.
The #3 and 4 carb the fuel is sqirting from somewhere around the choke butterfly area, which I dont see any passages.
#3 squirts fuel from somewhere around choke butterfly staight out the mouth of the carb towards the intake boot. #4 its squirting in the same area , but not shooting it out carb mouth.
Now I just looked at my junk #3 carb with bowl off and sprayed carb cleaner into the hole of the carb body where fuel would go and it doesn't shoot in to carb at all. It shoots out a hole on back side of carb body that months to airbox and shoots out the small cross over tube.
So I guess I got to tear this thing apart again.
 
Should see a cut out on the choke plate, that is where the nozzle is, cut out it to clear the nozzle...Nozzle is not centered, it is off to one side...the fuel pump circuit is the smaller tube that links between each carb...not sure what hole your shooting into.
 
[url=https://classicgoldwings.com/forum/viewtopic.php?p=158856#p158856:3cdahbfv said:
auctioneeral » Tue Sep 15, 2015 7:29 am[/url]":3cdahbfv]
Zman. I got one open. Working on unclogging the other carb.
Click to expand...
Congrats!..Tough to get to, but will be worth the effort.
 
[url=https://classicgoldwings.com/forum/viewtopic.php?p=158861#p158861:3f9zndqf said:
auctioneeral » Tue Sep 15, 2015 9:09 am[/url]":3f9zndqf]
Is there a adjustment that has to be made on the accelerator pump.
Click to expand...
No adjustment is necessary that I remember, Nothing in my carb book shows anything.
 
Ok I got it up and running with all nozzles clean out. Thanks to Zman and others.
First fire up it was running rough and rich. Which I was ready to throw the towel in on it.
Wife walk out and said how are you doing and I gave her and bike ear full. Started looking it over and found out I didn't tight the clamps for the intake boots, did that and wow it sounds a lot better. Try to sync. carbs. before finding out about intake boots loose. So my project for tomorrow after work is to try and sync. the carbs.
I had a very nice chat with mcgovern61 on the phone about bike and how to go about sync. carbs.
Will keep you updated.
Oh yes I pulled single carb to see if I could get honda carbs going, and I did it.
 
Ok I pulled carbs again to sync. on bench. Reinstalled and here is how it sounds now worst rich

https://www.youtube.com/watch?v=TcIQpRiKPQY 9/16

[video]https://www.youtube.com/watch?v=TcIQpRiKPQY[/video]

4 weeks ago before after cleaning carbs.

https://www.youtube.com/watch?v=pvGzOxnCl34

[video]https://www.youtube.com/watch?v=pvGzOxnCl34[/video]

video of the single carb on it. which I rode about 250 miles without problem. only removed so I could run honda carbs.

https://www.youtube.com/watch?v=QbGcwFxgrs4

[video]https://www.youtube.com/watch?v=QbGcwFxgrs4[/video]
 
Sounds like ignition is a little off. Yes exhaust looks rich indeed. Did you reset the mixture screws? Video didn't show the readings very well but it looks like one carb is a bit off at one point. Is your vac advance hooked up and functional?
 
mixture screws on bottom carbs 1 1/2 turns out.
No vacuum advance is not hook up, forgot to just run out to look.
How can I check ignition without having to remove belt covers?

I got to pick up new spark plugs again because these are black.
I won't be able to work on it now till Sunday because of work.
 
A handheld vacuum pump will check the vac advance. Just pull a little vacuum and see if it holds or bleeds down. If it holds and you hook it up while the bike is running you should hear the difference. Mix screws should be set but their location makes it very difficult.
 
I remember one fella found the 2 air jets under the vacuum cap were reversed, forget the symptoms but it didn't run well, If you have them out again take a careful look that everything is where it is supposed to be,
I suppose you did a bench fill on the carbs and drained bowls for 52CC of fuel in each., when you blew out the idle jets put your hand near the tiny holes that are in the throat of the carb to be sure idle passages are completely clear(can have in or back out the adjustment needles but if completely out you need to block the screw hole)
Check and be sure no one drilled out any jets or replaced them with larger, you never know what a rack has been through.
Did you clean out the screens under the float needles? have to be careful with them too, easy to tear the fabric.
Check inside the plenum for leaks too, center gasket can leak and cause rich condition, what carb the 4 D shaped o'rings are mounted on can cause a rich condition, all 4 carbs are machined for them but only 2 need them, 2 orings each carb.
Tough to diagnose from the chair here. Sometimes people dick around with these bikes till they dont run then sell them.
 
[url=https://classicgoldwings.com/forum/viewtopic.php?p=159002#p159002:zk6dundy said:
auctioneeral » Thu Sep 17, 2015 7:41 am[/url]":zk6dundy]
Do you think maybe it could be weak ignition. But it runs fine onsingle carb.
I'm throwing it out there.
Click to expand...
I don't think so.
 
Weak ignition will most certainly mimic a rich condition as mix cannot fully burn. Be sure the plug gaps are set right. Jeff is probably on the right track too on his carb advice. 30 year old carbs could have been molested in many ways.
 

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