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Post by tuesdaykolt on Mar 2, 2021 19:49:21 GMT -5
First of all hello everybody i'm loving the forum So i bought a used jonway solana scooter (previous owner was starting it with the kickstart) it ran fine for a day or two then stopped.i put in a new starter motor,battery,spark plug,ignition cable,carburetor and intake manifold...Still NO GO.so i tried to bypass the Evap system and still no go so i found the problem seems to be im not getting fuel into the carbThe gas stays mid tube but does not advance from there... Any help? im stumped and everytime i try i just run out of battery before i need to charge again.
I also put a video link of it turning over
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Post by crackmastick on Mar 3, 2021 1:19:52 GMT -5
Bypass the fuel pump thingy and just run the fuel line straight from tank to the carb. See if it flows. I'd imagine the valve pump thingy isn't working in this situation.
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Post by crackmastick on Mar 3, 2021 1:27:25 GMT -5
Looks like your fuel line goes uphill. Try priming the line or shorten it so the fuel only has to flow downhill. Top off the tank so there is more pressure.
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Post by aeroxbud on Mar 3, 2021 5:37:22 GMT -5
I would also check to see if the fuel filter is flowing the right way.
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Post by GrumpyUnk on Mar 3, 2021 8:45:07 GMT -5
If the fuel line has droops and hills, the fuel will stop when it has to climb uphill. Gravity fed fuel systems need the fuel to flow downhill. It will flow up, but only if the 'up' is lower than the outlet of the fuel tank, or actually the level of fuel in the tank.
You can see the fuel 'pulsing' in the fuel line, but it does not want to move. If you have a vacuum operated petcock on the bottom of the fuel tank(MOST do), it must be connected to supply manifold vacuum to one side of the diaphragm. The diaphragm is pulled by the vacuum, unseating a plug that restricts fuel flow when seated.
You can apply suction to the vacuum fitting, and should see fuel flow from the tank and fill the fuel line as it flows. Bubbles will work their way to the top, especially if you help them. It is easier to see fuel flow when there are bubbles in the line, FWIW.
If you get fuel flow by suctioning the petcock, check where the vacuum line is attached. It should attach to a nipple on the side of the intake elbow. If there are more nipples, they should be blocked by a cover, or connected to other vacuum lines, and NOT open to atmosphere.
You can squirt a spritz of fuel into the inlet side of the carb and crank it over to see if it will start and run for a few seconds, verifying your compression and spark. Repeating may get the fuel flowing as vacuum in the manifold should open the petcock and allow fuel to flow more quickly than cranking vacuum.
tom
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