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Post by one1 on Mar 15, 2015 19:27:37 GMT -5
OK so while the weather was cold it ran great. Now its 35 degrees warmer today and it bogs to a stop when you give it more than 1/4 throttle and hard starting. Everything is stock though so the only thing to change is the single mixture screw and it isnt helping me.
I just readjusted the valves, took the carb apart and blew the needles out, the spark is good as far as it looks. I can tell you that this all started with the weather change so I blamed it being an adjustment instead of an equipment failure however i am not making progress changing anything.
Notes: I can kill the engine nearly immediately by cupping the airbox. It chokes out extremely fast and cant recover if i let go. It WILL die. The engine backfires. No doubt it's rich...... is that normal with the temps rising up 35 to 40 degrees over the last time it was driven and set?
150cc gy6
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Post by niz76 on Mar 15, 2015 20:18:58 GMT -5
Yep- warm weather get here time to downjet a bit...
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Post by Fox on Mar 15, 2015 21:02:15 GMT -5
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Post by one1 on Mar 16, 2015 10:00:30 GMT -5
I havent replace the carb because it wasn't the problem last time therefore it has never had an actual issue to be replaced. when I go through the carb and all the needles line up all the diaphragms are sealed that's all there is to them a lot of people just throw them out because they can't fix them but I don't see an issue with just one and when I fixed what's the problem was last time it ran great so while I will replace the carb if I must I'm not believing that that's the issue at the moment what I am saying is that I'm only getting 1.5 volt to the enricher so I don't think I've got enough voltage to open the enRicher up properly because it tasted good yesterday
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Post by 90GTVert on Mar 16, 2015 10:05:13 GMT -5
Disconnect the charging and lighting wires from the stator and check the output. Should be able to do 50VAC+ when revved.
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Post by Fox on Mar 16, 2015 10:15:58 GMT -5
Well easy enough to get 12V to the enricher for a test run. Hopefully that's the issue.
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Post by one1 on Mar 16, 2015 11:04:30 GMT -5
I Hotwire the enricher and it didn't really seem to change much but it does slight bit better. that's only because it is trying to lean it out it. is super rich right now if I get down the road with it fully twisted and I left off I get almost two full seconds of full throttle before it slows down after after taking my hand off the throttle so its just completely full of gas. I thought the throttle was stuck for a minute before i figured out it just has that much gas in it after i let off
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Post by one1 on Mar 16, 2015 11:06:24 GMT -5
Am I going to be able to make changes that will affect that with just that mixture screw on the side of my carb for the top end adjustment
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Post by Fox on Mar 16, 2015 12:11:36 GMT -5
Doubt the screw will do anything. That's just for the idle circuit. If you have a movable clip on the fuel needle you can move it up a notch or two to lower the needle in the diaphragm slide and that will lean out the top end mix some.
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Post by one1 on Mar 17, 2015 8:04:25 GMT -5
Yeah but here's my problem it's a completely factory carb. it's never been touched even before the cold season it was running correctly so I'm not sure if I should screw with trying to change the richness that method when I believe that there's something else going on I'm just trying to figure out what it is before I do a couple of major changes like that which could get me further off the path. I'm not too far off from doing that however and I am debating ordering a backup carb that way when I don't get it right I can just put the other one on but until then I need to figure out anything that could be making it run quite so richly
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Post by Fox on Mar 17, 2015 15:06:41 GMT -5
Well I understand you wanting to get to the bottom of the issue. I cant tell you how many times I too stubbornly tried to make a f-ed up carb work and after exhausting all avenues I installed a new one the scooter ran like new. I had a milk crate full of carbs like that.
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Post by one1 on Mar 19, 2015 22:01:10 GMT -5
So at this point basically it loads up almost instantly at idle it is super rich but if I keep my hand on the gas I can drive it around like normal. The second i let off it backfires as it slows down and is completely loaded up. Once it cuts off its hard to get started and is flooded.
I tried to change the needle clip setting but a screw is welded on from heat fluxuation and wont budge so i cant get the clip out to drop the needle one setting.
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Post by 90GTVert on Mar 19, 2015 22:39:27 GMT -5
I'm with Fox here and think it's time for a new carburetor. If not, go over the float system again. If the float is too high it could make it rich all around, but it will really make it rich at idle and make it flood when trying to start. Enricher issues also have more effect at idle, but it would have cleared up when you wired it different if that were the only problem. If you haven't checked the valves lately you might as well.
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Post by Fox on Mar 19, 2015 23:52:59 GMT -5
Only thing I can think of is that somehow the ACV has some grit in there that's causing the problem. I never had any luck cleaning the ACV and it's related passages before but you might.
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Post by one1 on Mar 20, 2015 13:05:27 GMT -5
It starts perfect cold and runs great for about 30 seconds but once it gets heat in it its rich as can be. Youd think the enricher wasnt closing but it is.
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