New 50CC Scoot Bogs & Shuts Off / Petcock Issue By straightbangin (Read 27,095 times)

[straightbangin]

I sucked it just now, w scoot off and it made the gas flow into the cup just fine. So it seems either the petcock is working on and off or as u said maybe something blocking it up in the gas tank or line is making it work on and off. I reattached the fuel line to the fuel filter and the other hose back on the mainfold for now. It seems like at any rate I need to be able to get the back faring off to get a closer look at what is going on in the rear. LMAO. and... I have to wait for the backout kit for that. I didn't know that much fuel flows down to the carb when it is on, it seems like the tank would be empty within about 5 minutes of it being on, does it just circulate around down there or stop flowing once it has enough gas?

[Alleyoop]

GREAT!! That was a good test to Verify that that DAMN PETCOCK works on and off.
That is all I wanted to know to actually prove that the reason it is cutting out on you is LACK of fuel flow to your carb. So when it stops flowing and you use up the Fuel in the Bowl it dies.
Also Carry a Piece of wire or a piece of long stick with you and when it stops again stick the Stick into the tank and try and find the outlet maybe something is on the bottom of the tank and blocks the outlet and with the Stick or whatever you can move it away from the outlet.
Just a thought.
Alleyoop

[straightbangin]

Gotcha, so the bowl is kind of like the fuel reserve for a little bit? Sounds like a good idea with that wire/stick type item. Too bad they dont make chop sticks twice as long that would be a perfect item. Maybe I can just tape two together or something. That damn fuel bar in the tank will make it hard to move a stick around in there though. I wonder if I should try rocking the scooter around when it dies, see if maybe something will shake loose in the gas tank or kick the petcock back into action Well whatever happens, parts on order, and no trips farther than I'm willing to push it back for now Thanks again for the help, you are really good at being patient and explaining things

[Alleyoop]

Well let me say this, you now know more than a lot of folks on here. You tackled a lot of things and did a fantastic job. With what you did you can tackle just about anything on that scoot.
Proud of you have a good day tomorrow and will check to see if you have any more questions or thoughts or some other problems(HOPE NOT).
Alleyoop

[straightbangin]

Thank you. Ya hopefully I should be all set for posting for awhile. I have a game plan now

[straightbangin]

Just an update...

Carb and back out set ( stripped screw tools) came in mail just waiting on the petcock now.

I drove my scooter to the store and it went fine but I noticed as soon as I turned the key to the on position ( before I hit the starter button ) the fuel guage looked like it was having a seizure, going back and forth for about 10 seconds, then it settled down, then for my 5 min drive to the store, the fuel guage was all over the place again going nuts. Don't know quite what this means and if its related to a problem in the tank or w/ the petcock or the carb. I don't know if this HAS been doing this since the problem started and I just didn't notice it, but I doubt it, I'm pretty observant.

On the way back it died and I stuck something in the gas tank and moved it around a little to see if maybe I needed to loosen something that may have gotten stuck somewhere in there as you suggested. Tried to start it, nothing, tilted the scooter around trying to shake the gas around in the take a tank, tried to start it nothing, pushed it a block then decided to try to start it again for the hell of it and when I did before it tried to cut off right away I decided to try to pump the throttle 3-4 times thinking maybe the pumping may " wake up " / " tap on " the petcock and get it to do its thing and this actually worked and I drove it home the rest of the way ( 6 blocks ) blocks no problem. I don't expect this to always work but I had a scooter full of groceries ( in the seat too ) so i was prayin it would. LOL. I should be getting the petcock soon but until then I'm thinking of carrying a little bottle of gas and a squirter and if it dies, squirting some gas into the gas line just below the fuel filter ( not sure if thats okay to bypass the filter with a little gas ) and see if that helps me make it home. Hoping to have the petcock within the next few days though and not taking my scoot anywhere I dont HAVE to take it until then.

Any idea what may be making the fuel gauge go wacky back and forth?

[Alleyoop]

So it appears that the PETCOCK is the CULPRIT getting stuck and not opening all the time, so next time tap the sucker so it allows fuel to flow till you get the new petcock in.

I Wrote up a whole thing on the Crappy Sensor:
www.scooterdoc.proboards.com/index.cgi?board=trikes&action=display&thread=322

The gauges are crap really, it is probably loose on the sensor and sometimes make contact with the resistor plate and sometimes not. It has nothing to do with anything else.
You can fix it but you have to take the whole sensor out and tighten the so that it makes good contact with the resistor plate where it swivels up and down.
Here is what it will look like:
Alleyoop
This is in the up Position and registors full:


This is in the Down Position and registors LESS than full:


This is looking at it so you can see on the LEFT I put a Brass Collar with a set screw to keep the SWIVEL Plate Tight against the Resistor:



And if you do take it out and tighten it up you can then Plug it back in and test it outside the tank. Just turn the key on and raise the float and lower the float and you will see the gauge registor full and low. Then put it back in the tank and put gas back into the tank and check for leaks.

[straightbangin]

Oh cool Thanks

[straightbangin]

I'm still waiting for a dry day to install the petcock. My scoot didn't give me any crap yesterday or for half of today then it died. I started injecting fuel into the fuel line below the filter with my trusty old water syringe I've had for 10 yrs. Looks like this

Got it from the dentist to squirt water into the hole to clean it after having a tooth pulled. It was also super handy for squirting directly into the tiny thing attached to intake manifold when I first tested if it was a fuel problem. Well it died today while I was injecting fuel ( the plunger broke ) So I pushed it to CVS and bought one of these kids medicine squirter syringes. and I found that injecting 50CCs of gas into the gas line will get me at least 10 blocks. (It got me home anyway) So yes as you said, its def 100% a fuel problem. Woudn't stay start or anything even with the pumping the throttle trick this time. So water syringe for the win!

[Alleyoop]

Good thinking, hope you get a chance to put the petcock on soon and hope to hear that it runs and runs and runs.
Alleyoop

[straightbangin]

Me too. I'm trying to get the gas to run down because I guess you have to remove the gas tank and have it empty to replace the petcock, that's how it looks in pics/vids I've seen online anyway

[straightbangin]

As of right now I don't need any help. I'm just trying to get the gas down more so I can remove the tank and install the petcock. Not sure how much gas is flowing from the petcock ( how much its working or isn't ) so this may be awhile or I may say fuk it and take the thing off and siphon it out. Either way, I've got to use the stripped screw set to get the luggage rack off so I can get the faring off to fix the petcock and I plan on doing THAT part today when the sun starts to go down ( its hot as hell out at the moment )

I'm pretty much just posting to help others that may be having the same problem. This is how I have been getting it to work for now to get me out of having to push it. I have learned to have on scooter:

1) ziplock bag with:
2) 16oz bottle of gas ( labeled gas )
3) water syringe or baby medicine syringe
4) paper towels
5) wet ones (yes u will get a lil gas on you
6) have scooter seat unattached but before u get on it make sure the seat is down on the pegs that hold it on so its secure ( your body weight will hold it down)

I drive scooter, scooter dies. I try to start it and pump gas to see if it will wake up the petock, this hasn't been working lately.

Then I take the seat off, get out the gas, and put syringe in bottle to suck out 10cc, remove gas line from just under filter and pump 10cc into it slowly. I do this twice because then the line is full to the top and it wont let more go in. Reattach fuel line, toss gas bottle and syringe back in bag, start it up, drive it about 2 blocks so the gas gets all down in there. Scooter dies again around 2 blocks. Then I repeat but now it lets me put 10cc in times 3 making a total of 50cc that it let me put in. This gets me home ( around 10 blocks if not more) It hasn't stopped in 10 blocks after I do this and usually it gets me to where I'm going to next time i take the scooter out too. Talk about rigging it. LOL.

[sprocket]

Just a note... these Chinese petcocks are a huge problem...you might consider installing a manual shut off valve into the gas line where you can reach it easily...instead of the petcock

This way you turn on the valve before you start the scooter and then turn it off when you stop the engine...sounds like a pain ... but you get used to it...this way you never have to deal with a petcock again...

They are often called 'fuel shut offs' and any type will work.. you can often get them for riding mowers, snow blowers etc...


www.idealtruevalue.com/servlet/the-145986/B%26S-Fuel-Shut-Off/Detail

www.kartsandparts.ca/store/product.php?productid=2174&cat=744&page=1

www.jrhobbyhardware.com/shop/index.php?main_page=product_info&products_id=424

[straightbangin]

Thanks for the links. Oooo the last one is pretty! They look cute and simple

LoL. I prob would have but I already bought the petcock. If this one dies on me. I'll do what you suggested. It wouldn't be too big of a pain for me since if I can install one of these in the fuel line by the carb I can reach it from the inside of the trunk just by flipping up the little cover thingee that gets me to my carb area. Good idea

I've got to take my scoot apart to unhook the fuel from the petcock and fix the fuel sensor anyway so I'll just replace the petcock w the new one too for now. I can't even unplug the gas flow from the petcock to make it run direct ( bypassing the petcock) without taking the scoot apart back there so I'm gonna be learning about its insides either way.

MENTAL REMINDER: NEW PETCOCK DIES, TRY INSTALLING MANUAL SHUT OFF.

On a side note: We may be getting a hurricane, I'm looking at bungee cord and roping the hell out of the scooter and attaching it to the cluster of mailboxes out front. It seems the most secure thing to attach it to out front if s**t goes down

[straightbangin]

The backout set won't even get these stripped screws out on the luggage rack and I can't fix the petcock until I take the side faring off and I can't do that until I can get the luggage rack off. I drill into it, use a back out bit and it won't grip it no matter how hard I push. It just spins and drills it more.

Sigh. Time to get creative

Ok Edit: Back again. I had to get a lil nuts with it. I hammered the back out bit in ( made the mother f**ker grip ) it griped in good and then I took an adjustable wrench and it came out. Woot! Luggage rack off and good riddance. I'm not even buying new bolts for it. Its ugly and I never use it anyway. I bought black vinyl cling material (kinda like plastic suctioncupish paper) to go over the gas cap ( help keep any rain from sneaking in there ) and also to go over the holes where the luggage rack was attached.

Here is the before pic:


During:
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Here is the after:


Now I just pull the flap back when I need to put gas in
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I feel like half the battle is over w/ getting those damn stripped screws out. I guess you would call it a screw or a reverse bolt or something. Deep set notch and allen wrench was what was originally needed for it