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Post by timbermecrazy on Jul 19, 2020 12:18:23 GMT -5
Ok my friends. I know this is going to sound stupid to most. I got a 2020 solana yn50qt8. Title says it's a yungfu engine. Got it from a friend with no vacum or fuel lines. Can't seem to figure where they all should go. Has a 2 port manifold. Any help would be a god sent.
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Post by jloi on Jul 19, 2020 12:46:17 GMT -5
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Post by aeroxbud on Jul 19, 2020 14:30:25 GMT -5
Pictures would help. But normally the larger port on the carb is fuel, which goes to the petcock on the tank. The smaller is vacuum, which should also go to the petcock.
If your not sure which is vacuum, and fuel. You can put a pipe on one and suck. Fuel should come out the other. If it doesn't they are the wrong way round.
Mine are fuel out of the side. Vacuum underneath.
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Post by Mech Warrior on Jul 20, 2020 11:14:01 GMT -5
Most likely if it has a 2 port manifold one vacuum line goes to the petcock for your fuel and the other vacuum line may go to the PAIR system.  |
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Post by Mech Warrior on Jul 20, 2020 11:26:11 GMT -5
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Post by Mech Warrior on Jul 20, 2020 11:27:44 GMT -5
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Post by Mech Warrior on Jul 20, 2020 11:34:32 GMT -5
Hopefully these videos will help guide you on how to connect vacuum,fuel,PAIR system hoses.Let us know how you make out sir.
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Post by GrumpyUnk on Jul 21, 2020 8:45:45 GMT -5
One vacuum to PAIR, other to the petcock. Fuel goes to port on the left side of the carb, plugs in horizontally right above the top lip of the float bowl(within .5" more or less)
The picture above with a line going over the top of the carb is more common to the 150cc setups. The fuel 'in' would be rearward of the black part labeled 'auto choke'.
You will need vacuum to the bottom port of the petcock if you keep it vacuum operated, the upper outlet goes to the carb with a fuel filter inline on most.
You can check the petcock by applying suction to the line that goes to the bottom, actually to one side of a diaphragm, which pulls downward and unplugs the fuel outlet port. Fuel should flow to fill (at least partially) the fuel filter. Most times the fuel filter will fill enough for fuel to fall out the outlet and go on to the carburetor. It is unlikely that the filter will fill completely.
Unless you operate the petcock by applying suction, it will take several minutes(seems...) of cranking for the fuel to flow to the float bowl on the bottom of the carb. You can check for fuel in the float bowl by loosening the screw near the bottom of the float bowl. Some are directed into a tube with 'spring' looking shielding, others to a plain tube, and others still to 'nothing'. If there is fuel, it will come out when the screw is loosened so be ready for raw liquid fuel to dribble.(and close things up as soon as practical)
tom
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