New Rider
Currently Offline
Posts: 34
Likes: 0
Joined: May 22, 2013 18:27:11 GMT -5
|
Post by dystopias on May 22, 2013 18:41:47 GMT -5
I have a 2009 Schwinn Sport 50. It has a FY139QMB engine. Last fall I put in a 100cc big bore kit. The problem I'm having right now is that it won't start. I've checked the vacuum on the fuel line, and it seems good. I've adjusted the screw on the carb. and it seems to be good. I opened up the carb and looked to see if it was all gunked up, but it looked pretty clean. I took out the spark plug and cleaned with a wire brush. I am new to all this and trying to learn, so I didn't know if it was generating a good spark, so I ordered and just installed a new spark plug. Still nothing. here's a video with the sound of it trying to start:
the starter cranks and it sounds like it is even turning over, just not catching. I think it might still be problem with spark plug, as you can see in picture it looks like the spark plug cover with the wires does not go all the way up against the plastic housing like it used to - i tried putting in the old plug again and it still doesn't, so not sure what i screwed up.
any help would be appreciated, would love to get this thing working so I can enjoy the nice weather before it gets too hot!
|
|
|
|
Post by tvnacman on May 22, 2013 18:54:14 GMT -5
check the valve adjustment , charge your battery fully . Try again to start , if it will not start quick don't keep cranking . Get a few inches of vac hose , pull the vac line from the intake . Put the few inches of vac host in the intake , put about an ounce of fuel in a cup and let the vac line suck up the gas while cranking . If it starts pull the hose quick and install the vac hose back on the intake .
Let us know .
John
|
|
|
|
Post by larry001964 on May 22, 2013 19:43:18 GMT -5
Hi Dystopias,
I think a compression check should be done..
|
|
Sophomore Rider
Currently Offline
Posts: 247
Likes: 2
Joined: Feb 24, 2013 5:04:18 GMT -5
|
Post by gatekeeper on May 22, 2013 19:54:03 GMT -5
Check for spark.Take the spare plug, put it in the spark plug cap and put the metal part of the spark plug on the valve cover of the engine. Crank the starter and see if the plug sparks while cranking.
|
|
|
|
Post by alleyoop on May 22, 2013 20:11:00 GMT -5
Was it running after the BBK last fall and when you put it away was it running?
Sounds like it is not getting gas, it wants to fire up.
That SCREW you pointed to that is the IDLE SPEED SCREW, did you turn that and which way and how much?
Take any one of the Vacuum lines off WHEREEVER they connect to and get a paper cup pour a teaspoon of GAS and squeeze the cup to make a point and hold the VACUUM LINE UP and pour the gas straingt down into the intake. Connect the hose back up and try to start it.
It should fire and maybe start and die.
Let us know how that test goes.
Alleyoop
|
|
New Rider
Currently Offline
Posts: 34
Likes: 0
Joined: May 22, 2013 18:27:11 GMT -5
|
Post by dystopias on May 22, 2013 21:02:25 GMT -5
[replyingto=gatekeeper]gatekeeper[/replyingto]Yes, the plug does spark. I've gapped it to .030
|
|
|
|
Post by alleyoop on May 22, 2013 21:07:17 GMT -5
Try what I said to get gas straight into the intake, That will tell us if it is a fuel delivery problem or a badly adjusted Carb.
Alleyoop
|
|
New Rider
Currently Offline
Posts: 34
Likes: 0
Joined: May 22, 2013 18:27:11 GMT -5
|
Post by dystopias on May 22, 2013 21:08:29 GMT -5
[replyingto=alleyoop]alleyoop[/replyingto]Sorry, I should have mentioned that. It worked after the BBK and it has worked this spring. the only trouble i've had this spring is with the kickstart getting pushed in, off of its c-clip - but with the addition of a new washer and c clip I think i got that problem resolved. Of course I rode scooter to work in the morning and then it wouldn't start so i couldn't go home :-(.
the idle speed screw in the carb, I had to adjust that a bit as it started stalling while idling and I'm pretty sure it is in a good place now.
I'm a little confused by Tvnacman and alleyoop's suggestion - are you saying I just need to make sure that gas is getting into the carb? Would you mind clarifying?
thanks so much!
p.s. I did remove the gas line from the carb and the vacuum line, when i sucked on the vacuum line it opened up the intake and let gas through, which is what i meant by the vacuum is fine. . . . sorry, i'm still learning all the terms.
|
|
New Rider
Currently Offline
Posts: 34
Likes: 0
Joined: May 22, 2013 18:27:11 GMT -5
|
Post by dystopias on May 23, 2013 17:34:08 GMT -5
[replyingto=alleyoop]alleyoop[/replyingto]Okay, I figured out your instructions - i removed the vacuum hose and poured in a teaspoon of gas so that it went into the intake.
no change in starting.
|
|
|
|
Post by larry001964 on May 23, 2013 17:39:00 GMT -5
If you have spark, and fuel, then that leaves timing and compression..
|
|
|
|
Post by geh3333 on May 23, 2013 17:48:32 GMT -5
Is this the first startup of the season. If so did you keep the battery on a trickle charge. If not your battery may not be turning the engine over hard enough especially if its the first star after sitting. I had to jump my batt before at first start due to a weak batt. After that it started just fine
|
|
|
|
Post by tvnacman on May 23, 2013 18:36:12 GMT -5
Alley and I are on the same page , I think a teaspoon is not enough . I have had to use up to 3 or 4 ounces . It would not hurt to adjust the valves and retork the head . You can pull the intake manifold and pour gas down the intake , see if it will start .
John
|
|
New Rider
Currently Offline
Posts: 34
Likes: 0
Joined: May 22, 2013 18:27:11 GMT -5
|
Post by dystopias on May 23, 2013 19:50:37 GMT -5
[replyingto=tvnacman]tvnacman[/replyingto]not the first start of the season. I've charged the battery to full.
|
|
New Rider
Currently Offline
Posts: 34
Likes: 0
Joined: May 22, 2013 18:27:11 GMT -5
|
Post by dystopias on May 23, 2013 19:52:31 GMT -5
[replyingto=tvnacman]tvnacman[/replyingto]Okay, i'll try more gas. I've ordered a feeler gauge from amazon, should get here tomorrow, so I can check the valves. also will need to get a torque wrench that does low torques so i can retorque the bolts.
|
|
|
|
Post by tvnacman on May 23, 2013 19:57:06 GMT -5
I was working on an engine , I completed most of the rebuild . I did not have my feeler gauge , I tore opened a BEVERAGE can and used the aluminum to gap the valves it did run . When I had the feeler gauge I was off a little bit .
John
|
|
..BAD TO THE BONE..
