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Post by sweden on Aug 23, 2010 8:46:06 GMT -5
Just a quickie.
After watching the big guys carb cleaning video again, I noticed that the float is on a spring, mine is just loose in there, I turn it up and it just drops with the gravity, am I missing a spring in there and this is the stupid thing that is causing my bogging?
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Post by yggdrasil on Aug 23, 2010 8:57:48 GMT -5
Mine wasnt screwed in like on the big guys.
It just has a retention pin that goes across.
and the spring action is controlled by a sort of wierd clip bent metal system.
Just hold the carb right side up and look at the bottom of it(bowl off), then visualize what it would be doing with gas pushing the floats up .
I dont know, I gave up on my carb and am just going to replace it.
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Post by sweden on Aug 23, 2010 9:01:42 GMT -5
Mine has the screw but it doesn't have spring in it that would push against the force of the fluid raising it and as mine bogs a bit more when hitting a bump I am wondering if it is right and if this is what is causing all my bogging problems, I would like to try someone elses carb on the bike to see if that is the problem as carbs, as well as everything else here, is stupid expensive here!!!
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Post by rgdroid on Aug 23, 2010 9:20:36 GMT -5
sweden, that might be your problem then.
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Post by sweden on Aug 23, 2010 9:27:09 GMT -5
I am thinking that I should just replace the whole carb and feel safe in the knowledge that no grubby little tike has had there hands on it but me!!!!!
Are they set at the factory or will I need to set it up myself?
It cost about 100 bucks here, any ideas if I can get it cheaper elsewhere?
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Post by sweden on Aug 24, 2010 0:29:45 GMT -5
Can someone just confirm that when the float bowl is off and you hold the carb upside down that the float should be able to be pushed down and then spring back up on the qmb 139 carb.
Cheers folks.
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Post by lshigham on Aug 24, 2010 4:54:14 GMT -5
I have three here, all are loose with no springs.
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Post by sweden on Aug 24, 2010 5:25:15 GMT -5
Damn.....maybe a new carb isn't my answer then!  |
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Post by rocketdog on Aug 24, 2010 6:04:21 GMT -5
The metal tab between the float hinge  rests on the spring loaded plunger in the float needle.  For the float height. The seam on the float ought to be about parallel to the center line of the bore, without compressing the plunger.   RD |
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Post by Bluefront on Aug 24, 2010 6:24:03 GMT -5
^^^^In that last photo.....the spring is beneath the plunger, and not visible. There's really no way for it to fall out. That piece is called a "float needle" and comes with most carb repair kits.
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Post by rocketdog on Aug 24, 2010 6:45:02 GMT -5
Like Blue is saying. The true spring is inside the needle under that plunger.
The wire that holds the needle to the float tang is not a spring. There are carburetors the don't even have that wire on the needle.
RD
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Post by sweden on Aug 24, 2010 6:54:57 GMT -5
Ok, so when my carb is in the position of the first photo, I should be able to push my float down and then it would spring back up right and be in that position shown? I think I am missing a spring inside the plunger then as I have to lift it to see the needle in that place. Maybe a new carb is the answer, I don't want to spend out needlessly on this if the float should move around freely, a few conflicting things here.
Cheers for the pics etc and comments, all really useful.
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Post by Bluefront on Aug 24, 2010 8:04:34 GMT -5
The plunger should extend outward when sitting there.....and spring back out when you push it down. The spring broke or got stuck if the plunger doesn't spring out.
Carb repair kits cost <$20.
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Post by sweden on Aug 24, 2010 8:24:02 GMT -5
Thank you Bluefront. I am guessing that the circus chimp who owned the scoot before stripped the carb down pulled it to bits put it back together and said to his mummy chimp, "look at all the bits I have saved!"
I am going to buy a new carb and hope that this is going to solve my problem!
Thanks for all the answers folks.
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