gas leaking from carb

[wizardaeon]

Im sure this is a noob question, but I have a problem of gas leaking from the carb. I already replaced the petcock. The guy who has been working on my scoot has to put his hand over the intake of the carb to start the scooter. The scooter seems to run, but after a while gas starts leaking from the carb.
Have to keep trying and covering the intake of the carb to get it started. I didnt have any trouble starting it today after it set for a night

[buiditright]

sounds like your float is stuck you could probably fix it with a real good cleaning, Your needle could be bad.

Bill

[edfr]

If you have to cover the Air Intake to start it means your ENRICHER(CHOKE) is not working?
Very simple to check if it is working or not. Before you start it take it off and if you see a SPRING between the Plunger and the Rubber holder it is EXTENDED and Not working.

Also where is it leaking gas?
Lefty

[buiditright]

sorry I bothered

[wizardaeon]

the gas is comng out of the intake on the carb- and I thought about the choke too- but its a brand new carburator with a brand new choke- I will check it tho to see if its bad.

Like I said, my friend can get it running, and he doesnt have to choke it every time- the problem seems to be when it gets warmed up.

Beginning to think my friend doesnt know what hes doing.

[edfr]

Are you talking about the Air Intake or The Intake going to the engine?

Besides the Choke, how many miles do you have on it. It could be your Valves are to tight and need adjusting .004 Intake and .005 Exhaust. That will always cause hard starting cold or hot.
Lefty

[wizardaeon]

just had the valves adjusted. The gas is coming out the air intake of the carburator. If I have to cover this with my hand when I start it I wont be able to put a air filter on it.(right?)

[edfr]

Wizardaeon,
You need to have some type of Air Filter otherwise dirt will get in and clog up your air and fuel passages in the carb. Did you check the CHOKE and see if it is working? Have you adjusted your Air/Fuel Mixture?

Is the gas coming into the Air Intake side a lot, is it dribbling out or streaming out OR just some spray.
Lefty

[S.B.H.]

without being there my guess would be needle and float issue

[kixome]

If it is straight pouring! out of the carb then it is either float/needle jet adjustment if possible or replacement.

The only other way for gas to flood the carb to where it is pouring out. Would be in the vacuum line from the petcock/fuel pump.

You replaced this so definitely clean and check your carb.

Caution Carb cleaner eats plastics and the floats are usually plastic. Remove it to clean.

[wizardaeon]

still having issues, trying to avoid taking scooter to a shop ( I cant get it there and cant afford it)

I have a 50 CC longbo 50QT-22 scooter with a gy6 engine.
I have new= CDI, magneto coil, spark plug, battery, carburator, choke and petcock.

my scooter has trouble starting, but eventually it will start
usually I have to cover the air intake with my hand "to choke it" in order for it to start. But after it starts, it dies again.

Afterwards, I find gas all over my hand, it trickles gas back out. ( from the air intake)

I have the valves adjusted to .004


Trying to find information on how to adjust the needle/float

[dr1445]

you might want to check that gas has not made it to the engine oil.

[edfr]

Wizardaeon,
Does your carb have a Enricher(CHOKE) on it?
Does your Carb have a Air/Fuel Mixture Screw on the Left side of the carb? like the picture Below?

IF your tank is ABOVE the CARB you have a Gravity Feed System, Make sure the Fuel LIne Connected to Your Carb IS NOT BELWO THE CARB.

If so turn that screw Clockwise until it stops do not force it just until it stops, ALSO COUNT the number of FULL turns it took to close it.
Now turn it Counter Clockwise 2 turns and Turn the IDLE SPEED SCREW Clockwise a little about 1/8 of a Turn.
Now try starting it WITH THE AIR/FILTER ON.
Let us know if that is any better, If it starts then Let it get warmed up and then the Carb Can be ajusted better.

If you have questions about anything just ask.
Lefty


Also here is what some of the hoses around the carb are for:

[wizardaeon]

thanks Edfr

Update= well now I dont have gas leaking from the carb- but engine will only start at 1/2 throttle and wont stay running- you pretty much have to crank the throttle to keep it running- wont idle- it just dies.

Also, wont start at all with the air filter on

is it possible to have the hoses to the petcock running backwards?

[edfr]

Take a picture of your Petcock and the hoses going to the Carb.

But on the Petcock, you will have 3 NIPPLES, the ONE on the TOP of the PETCOCK is your VACUUM NIPPLE and that should connect to your VACUUM created by the engine.
The other hose of course goes to the INLET FUEL on the Carb.
VERY IMPORTANT:
Now the FUEL HOSE coming from the PETCOCK MUST NOT BE LOWER than your CARB, It is gravity fed if the hose or Fuel Filter is BELOW the Carb your carb will not get gas.

Does your carb have an AIR/FUEL mixture Screw?
If so TURN IT CLOCKWISE until it stops AND COUNT the number of FULL turns it took until it stopped. Then Turn it Counter Clockwise 3 turns.

Lefty
Lefty

[wizardaeon]

ok im gonna try that next. I hadnt thought about the gravity thing lol

[edfr]

I hope that is it, it happened to one of the other guys here, He took pictures and I just happened to Notice that His Fuel Filter was below the Carb. Told him to raise the line above the Fuel Inlet on his carb and by JOVE that was it.
Lefty

[wizardaeon]

ill let you know how it goes in a couple of days- one thing I would like to know- if you have a carb with a built in fuel pump, do you still need a petcock?

(Petcock and fuel filter are well above the carb by the way)

[edfr]

Good at least the lines and filter are not below the Carb. Fuel should flow to the Carb and fill the bowl up.

You still need the Petcock that controls the Fuel from the tank to your Carb to keep the Bowl Full of Fuel.

The Pump on the side of the Carb is to give it a Squirt of fuel when you Crank the Throttle because you are all of a sudden letting in a lot of air and not enough fuel comes in at the same time. So that helps it from bogging or hesitating on you when all of a sudden you crank the Throttle.
Lefty

[wizardaeon]

im gonna have to wait until I get a ride to the auto parts store so I can get some fuel and vacuum lines. Im using the old ones that were on the scooter when I got it plus a couple that came with the new carburator. My roomate suggested that I bypass the fuel cock and run it straight to the carb.
But I dont know if I have a vacuum on the petcock- one end is on the vacuum part of the petcock, one is going to the nipple on the intake manifold, and one is going to a nipple right below the plunger on the carb- is this correct?

[edfr]

All Petcock have a Vacuum Nipple, Well the Vacuum hose on the Petcock SHOULD be connected to the NIPPLE ON THE INTAKE MANIFOLD. The Other hose goes to the FUEL INLET on the CARB.
Can you take a picture of this and post to make sure all is connected correctly. Then there would no question about it or maybe we could see a problem.
Lefty

[wizardaeon]

ill try to get a picture tomorrow- its dark here now- but the petcock fuel hose is connected to the fuel intake- the nipple on the intake manifold is connect to a 2 way splitter- one of those coming from the splitter is connected to vacuum on the petcock- the other to the nipple on the top of the carb right under the diaphram.

[edfr]

Sounds Good, just a questioning the nipple on the top of the Carb under the Diaphgram? Usually that one is just a VENT that has a hose just hanging it is on the LEFT side of the Carb is that RIGHT? Take a picture of that one ok. But everything else sounds good.
Lefty