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Post by bobf on Sept 23, 2015 15:11:01 GMT -6
I have received my replacement carb. It looks good but for one small part that was cracked and fell off when I was looking at it. I don't think it will be a problem as it is where the throttle cable is held to the carb. I will know better after I get the carb out and look at it and the new one close up. I hope the vendor will cover it if it appears to be a problem.
Big problem right now is the removal of the carb. I traced the electrical and it looks to be OK on both left and right sides. But I am a bit baffled by how it is mounted to the engine. I don't see any mounting items on the scoot or the carb. So there must be a connector of some sort that is not clear to me. I am thinking it must be some flexible part that might clamp to the carb and then bolt to the engine. I can slightly wiggle the carb but not sure where it is mounted.
OK, I just came back from looking at the carb and engine area. I see a narrow band around a rubber part. I appears the clamping action is underneath somewhere. This is going to be a problem to get loose. Any suggestions about how this is done? I will continue on my own but will appreciate some experienced suggestions.
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Post by bobf on Sept 24, 2015 9:47:30 GMT -6
OK, this morning I spent time removing the old carb and installing the new one. At a point right now where I will have to put some inside panels back in place so I can hook up the battery and see if the new carb will run the machine.
I fought with the squeeze clamp with the screw on the very bottom till I had finally loosened it enough to allow me to twist and yank the carb till it came loose from the rubber block.
Then I turned the squeeze clamp till the screw head was at the top. Pushed the new carb into the rubber part and reaching over the top I was able to get my Phillips into the screw head and tighten it. Then applied the electrical's and hoses. I did engage and adjust the trhottle cable before installing the carb. as I felt I needed more freedom in rotating the carb so I could better set up the end piece and cable that way. I hope that little piece that makes you insert the plug and then rotate it till the cable is in the groove will not allow the plug to slip out. Will find out soon I guess.
Now to start rebuild till I can get electrical working and test the new carb on the motor. That likely means some fiddling with idle if it does run. I will post about that when it is done.
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Post by bobf on Sept 24, 2015 14:30:29 GMT -6
A bit of help or advice please. I once again have both carbs out and ready for advice.
I have had a bunch of problems so I took the new one out and have been comparing the two. They look much the same, but with differences that may mean something or maybe not.
First is the copper pipes sticking our the sides. I see no problems with most of them but the one just above the bottom part and left side as you look into the air intake. It is a little bigger than most of them. Most are about .06 and the bigger one is about .12 across.
On my older carb the bigger tube is open, I don't think there was a hose on it and it does have a plastic reducer in it. On my new carb it has a different outside end and it is capped completely. Which is the correct way, open like the old one or capped like the new one.
On my old carb there is a bracket to which the throttle cable is attached and adjusted to eliminate slack in the cable. On my new carb the bracket has been extended and it sort of blocks my idle low speed adjust screw. I think it may be OK if the air tube doesn't restrict access too much. I hope it will be OK as I tried to take the brackets off and swap to the new one from the old. I could not turn those Phillips screws so that idea went too pot.
The air tube from the intake filter near the rear tire and forward then a u-turn and back to the carb intake is a real nasty mess to work with. I have not been able to get either end to enter and reside where it should be. I even tried lubricating both ends to make the slip fits more possible. So far just a waste of lube. I hope to somehow at least get the ends lined up and be able to put the hold down screw in place and tightened, Then at least I might be able to tape the ends if it does not run well.
I think that is about it for today's efforts. Any and all help is appreciated. I go back to work now on reinstalling the new carb. But not sure what to do with the capped larger tube. And also the larger free tube on each carb. Just let them hang down or route them up. No instructions on what to do with them.
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Post by ellpee on Sept 25, 2015 8:06:59 GMT -6
Only thing I can offer is that on both of my scooters, the carb is not "hard-connected" to the engine at all -- is is sort of suspended by the air intake at the back end and the manifold output at the front, both secured with big clamps. Assorted other small hoses and wires connect to the carbs, but they don't connect it to the engine.
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Post by bobf on Sept 25, 2015 9:43:03 GMT -6
ellpee, you are so right, and that is where my problem lies. Yesterday it took quite a while to get the carb held by its rear fastener. It took a lot of fiddling around to get it to fully enter the mounting hole and clamped.
Now today I am having a big problem getting either of the front mount to the air tube or the rear mount of the air tube to connect as they should. Nothing seems to be aligned and they do not even try to enter the clamping portion at all. I spent half of my yesterday efforts on getting the air tube to mount. gave up took all off again to attempt to get it back on correctly among other reasons. Today the carb is properly mounted and clamped. That happened late yesterday and today I am trying to get the air tube installed and clamped. Neither end is willing to do so. Till I get the air tube and carb clamping area started I won't be able to get the air tube and air filter area aligned and entered for clamping. Just not sure what in the world is wrong with this assembly that will not fit, let along get clamped.
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Post by bobf on Sept 25, 2015 10:55:03 GMT -6
OK ellpee, you got me to thinking again. So I went out and removed the air tube. Loosened the carb then reset it again. It was wrong from yesterday. So now it is fully seated on all sides of the connector tube. I rechecked and made it so. And further I did not clamp it down yet.
So reinstalling the air tube I found that the air tube end to the air cleaner stuff did align and partially entered the clamp, about a half inch. Now I cant seem to get the carb air intake to seat in the clamp area. So more fiddling will be needed to get that alignment just right also. It won't take much, just enough for the clamp to work.
This scoot has been a problem since I bought it. Whomever buys this scoot will have lots of things already fixed. First it was the gas tank had a leak where the gas withdrawal fitting and hose was. Fixed. Dead batteries. Put several in till you suggested a fix. Fixed. My old age. Not fixed and getting worse so the wife has decided I should sell. I agree and this latest won't run has been put on the carb. I agree and hope this replacement will do the job. Never expected such precision to be put into the air tube thing. Why not something more flexible, stretchable, twistable?
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Post by bobf on Sept 25, 2015 12:31:15 GMT -6
OK, fixed the air tube finally. I let the carb mount be loose so the carb could also help in the alignments problems. I originally had the carb push back to interlock the cutout in the rubber mount with a tab on the back of the carb to help center and align the carb. Now I have no idea if that is still the case or not. Big item is that finally I have the air system mounted and all clamps have been tightened.
Next is to assemble the inner panels that will allow me to install the battery. Then, if the battery has enough charge I will be able to start the engine, warm it up, and make the basic adjustments.
No more bad words for the designers, if it stays together and runs well.
Will report on my success or frustrations when done.
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Post by bobf on Sept 25, 2015 13:16:22 GMT -6
OK, progress with the restoration to operating condition. Recently I commented on the larger tube into the carb. On the old one unprotected and on the new one it was capped. I asked why this difference. I think I know now. I found a hose coming from the fuel pump and just hanging down. I don't remember taking it off. Maybe it was loose on the fitting and was the cause of my carb not working correctly. So I took the cap of my new carb and put this hose, with a clamp, on that larger tube. Maybe that will make all the difference for the carb to be working, new or old.
Any comments from others that have set up a carb recently?
Also, my parts chart shows this line going through a fuel filter, but I can't find one on my scoot.
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Post by bobf on Sept 25, 2015 14:32:13 GMT -6
I put on enough plastics to hold the battery, I just ran it for several minutes and after warmed up I adjusted the valves once again. And now have the idle set to just about 1,000 rpm. It sounds real good.
Just wonder now if that hose from the fuel pump could have been the problem. Loose and leaking a bit. Just enough to cause the lousy running. I put the hose on this new pump and made sure the clamp was solid and tight on the tube. Will find out in time. I will keep the old carb as it may just be fine with me being the problem.
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Post by ellpee on Sept 27, 2015 10:24:02 GMT -6
Only hose I know of that should be coming from the fuel pump is the main fuel feed -- gas should squirt out when you crank the engine. Wait, let me take that back, there's also a vacuum connection that DRIVES the fuel pump. Goes to a Y connector, one out goes to the manifold as I recall and the other out goes to one of the connections on the carb. May not be the same for your scoot.
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