New 50CC Scoot Bogs & Shuts Off / Petcock Issue By straightbangin (Read 27,064 times)

[straightbangin]

I'm having images of my grandfather teaching me what siphon means at the age 4 as he would siphon the water out of my kiddie pool and I would laugh as he did it because I used to pee in the pool Suck canister hoses. Got it. I'll do it tomorrow when its light out again. Thanks for the great ideas

[Alleyoop]

Well if the Fuel Ratio Screw does nothing after 5 minutes to allow the CHOKE to Extend and cut off the extra fuel and you smell gas, and you cannot take the CHOKE off .

The Fuel Ratio will DO NOTHING if the CHOKE is still allowing fuel to come in when it should not. So it is a guessing game is it the CHOKE or a CLOGGED PILOT JET and PASSAGE that.

With the scoot off turn the Fuel Ratio screw Clockwise until it stops and count the number of turns it took until it stopped. Then turn it out Counter Clockwise 1 LESS TURN, that should take some gas away from coming in. Then take it for a test drive AND BRING along your screwdriver just in case it dies. If it dies on you then you can turn the Fuel Ratio screw back out the 1 extra turn so that you can make it back home. Or if you can just go around one block a bunch of times so if it dies you will not have to walk it back so far.
Alleyoop

[straightbangin]

Ya I was thinking the same, it could be the choke or clogged jet. Seeing as how I can't remove the choke due to stripped threads I would have to get a new carb anyway. The screw that holds the carb on the front is getting stripped now I'm going to have to replace the screw before its done.


Okay so tomorrow: suck lines

and

w scoot off turn fuel ratio screw clockwise all the way until it stops but count number of turns ( say it turns 2 1/2 times) I am then to turn it out counter clockwise one less turn meaning 1 1/2 times?)

If it dies, turn screw back out ( counter clockwise) one more full turn. Is that correct?

How long do you think I should test drive it for? The past few times it has done this, it has happened anywhere from trying to leave the parking spot to as long out as 15 minutes of driving later. Driving it around the block over and over sounds great because I wont have to push it back far but its a busy traffic city so I'd be waiting at each stop sign for 5 min LOL. I'll just go out in a straight line and back several times and be prepared to push ( loaded with water and sunscreen)

Thanks

[gatekeeper]

The gate is on autopilot for a minute.

When I watched your video of the scooter running it sounded to me like it was idling pretty fast. Was the rear wheel spinning while the scooter was idling? If the idle speed is too high the carb will start drawing fuel through the main jet and if so, adjusting the mixture screw might not make an audible difference. Alley, please correct me if I am wrong about that.

If my hearing was just out of whack and it's idling slow enough, are you able to seal off the area you pulled the cap from over the air screw with your thumb or something. If that doesn't make a difference in idle speed it rules out air getting past the screw threads.

[straightbangin]

LoL @ autopilot. Ya it was idling pretty fast. I have it turned up to idle just so fast that the rear wheel does not spin. Another 1/4 turn and it starts to spin slowly. Maybe I should turn the idle screw back a bit? Alleyoop said to turn the mixture screw with the scoot off but I know its supposed to be warmed up to turn the idle screw... i think.... so not sure when to turn it back a little if i should. Your hearing wasn't off I have it on a pretty fast idle. I thought that is how ur supposed to have it as long as the back wheel doesn't spin I can try putting my thumb over the mixture screw and see if it does anything. Good idea.

[Alleyoop]

The Idle Speed screw you can adjust once the scoot is NICE AND WARMed up. You can turn it down some more and lower your idle. You will know if it is to low it will want to die.

As far as the FUEL RATIO screw you got it correct. If it is 2 1/2 turns when you Close it then turn it out only 1 1/2 turns. We are assumeing it is running TO RICH due to the CHOKE not working. And I think you verified that by pulling the Plug and it was wet BACK IN THE 1932 MOVIE(HAHA).

GATEKEEPER,
Yes you correct if it is idleing to high or the Choke is still feeding fuel the Fuel Ratio Screw will
not react much. But if you turn it CLOCKWISE enough turns it SHOULD KILL YOUR MOTOR even if it is idleing at 2000 rpms.
Alleyoop

[straightbangin]

Ok cool. Got it. I'm assuming it is running too rich too.

See when I first adjusted the fuel ratio screw I DID hear a difference when I turned it. Now I don't. The only thing that changed between when I first adjusted it and now is I changed the spark and I raised the idle w the idle screw, so maybe it is because it is idling too high.

The words " kill your motor " just scared me. I don't want to have to replace that

[gatekeeper]

I usually set mine so that the wheel will not spin while the enricher is open on a cold start then as it closes the idle drops a little more. Yours is probably ok as long as you have stock springs in the clutch. Stiffer springs will let the rpm's climb higher before the clutch engages and starts the wheel spinning.

That canister in your one video is to collect fuel vapors instead of letting them vent to the atmosphere. That little piece in between the big canister and the gas tank is a one way check valve. Vapor from the tank, thru the check valve and into the big canister for storage. When the engine runs, vacuum is supplied to a valve on the big canister. the valve opens and the suction of air coming thru the air filter draws the vapors out of the big canister into the air intake side of the carb to be burned. If it works as designed, great. If not, some people choose to disconnect all of it. I say if it is working leave it be.

Probably more than you wanted to know.

[straightbangin]

I like to learn, I can never be given too much information. Thanks!

[gatekeeper]

Aug 11, 2011 19:05:25 GMT -6 straightbangin said:

The words " kill your motor " just scared me. I don't want to have to replace that

He just means the motor will stop running due to fuel starvation. Once you feed it again it will start right back up.

[straightbangin]

Hehehe. I figured. It just sounded scary. So clock wise on idle screw is higher idle, counter clockwise is lower idle.... On the air/fuel ratio ( mixture ) screw clockwise is leaner ( less gas ) and counter clockwise is richer ( more gas ) - causing the higher idle? Am I correct here?

[Alleyoop]

Have to be careful of the words I use(HAHA).

But yes, lower the idle Like Gatekeeper mentioned When you first start it up COLD lower the idle so that the rear wheel is NOT SPINNING.
Alleyoop

[straightbangin]

Ok, so game plan for tomorrow: Before starting scooter: Turn mixture screw how ever many turns clock wise until it stops then turn it back one full turn less than that counter clockwise. Then start scooter and before it is warmed up lower the idle a little. Right now the rear wheel doesn't spin but the last time I adjusted it, it was warmed up. Not sure if it spins when its cold.

Test drive.

If it dies, turn mixture screw another full turn counter clockwise & also try sucking some lines ---> after it is all cooled down ( later in day).

Does this sound correct?

[gatekeeper]

Aug 11, 2011 19:17:12 GMT -6 straightbangin said:

Hehehe. I figured. It just sounded scary. So clock wise on idle screw is higher idle, counter clockwise is lower idle.... On the air/fuel ratio ( mixture ) screw clockwise is leaner ( less gas ) and counter clockwise is richer ( more gas ) - causing the higher idle? Am I correct here?

That is all correct. But turning the air screw counter-clockwise will only increase the idle to a point. Once you go beyond that point, too fuel heavy of a mixture will start to flood the plug out and idle will drop off and if allowed to continue the engine will stop running.

[straightbangin]

Gotcha. When I turn either screw I only turn it 1/4 turn at a time and wait 15 seconds for it to catch up ( I'm gentle with it )

Oh also when I said my spark was wet it wasn't like super wet it just wasn't like bone dry