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Post by genseeker on Jul 11, 2014 13:56:35 GMT -5
I had a Jonway 50 cc that I got used. Was riding it until early April when I took about a 16 miles ride, each way. Scoot ran well, even if slow going up hills. On way home, noticed it was low on gas so filled it up and it wasn't out just down to about 1/4 tank. Ran fine the rest the way home, prob about 2 miles. Went to go somewhere the next day and it wouldn't start. Turns over but just doesn't quite catch & start. Cleaned carb, replaced fuel filter, replaced plug w/ NGK. Still nothing. Can't check auto choke to see if it is working properly cause we can't get it to run. My oldest son now has the scoot & wants to fix it so he has something to play with.
The question: Can we disconnect the autochoke on mine from the wiring harness & then plug in his autochoke to test if it is moving like it should? I know you have to cover the hole if you are removing the autochoke so you can see if it's working and seems just plugging his in instead of mine should show us if it is moving.
Any other possible reason for turn over / no start would be appreciated as well. Emptied most the gas out after it sat a couple weeks and younger son's Tank 250 ran fine with that gas so don't think it was bad gas.
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Post by 90GTVert on Jul 11, 2014 15:54:00 GMT -5
Plugging his autochoke in would tell you if your scooter was supplying power and if his auto-enricher works. Wouldn't tell you if your enricher works. If you wanted to test yours the easy way would be to plug it into his harness. Just leave his enricher in the carb and plug yours in. At worst his may run rough. For starting the enricher doesn't need power right away though, so what you'd really need to check for a starting issue on the enricher is if it's retracted or if it's stuck out. Should be retracted to allow additional fuel flow past to richen at start.
Have you checked for spark? Plug wet or dry?
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Post by genseeker on Jul 11, 2014 16:05:19 GMT -5
My brother checked for spark and it's getting spark. Plug is dry, the old plug was carbon fouled which is why I replace it. We removed the enricher and the needle is extended when you take it off. Don't know if it should be open or closed when not running.
My brother knows tons about cars, not so much about scoots. Mine is running fine, its the old scoot (Jonway) that won't start. But you answered the question of checking the enricher by removing it from the non-running scoot & plugging it in a working scoot to see if it moves.
Kinda hoping it turns out to be a bad enricher which would make it easy for my son to fix. He has a car but gas is expensive and he thinks a scoot would be fun just for riding around town, especially in nice weather like this.
I'll see when I can get over there but it may be a few days. He has the scooter about 15 miles away from me, just gotta find a time he'll be home. You know how young adults are, always gone, lol.
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Post by 90GTVert on Jul 12, 2014 6:59:11 GMT -5
The enricher would need to be shorter when it's cold so it's opening the path for more fuel to pass by at startup.
Since the plug is dry and it sounds like you've gone over the rest of the fuel system, have you checked that the petcock is working. You should have no fuel flow when the engine is not running or turned over, but if you crank the engine over fuel should pass through.
Another very common scooter starting issue is valves out of adjustment.
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Post by genseeker on Jul 12, 2014 20:28:33 GMT -5
yeah, I replaced the fuel filter with a clear one and you can see the fuel flow in it. My brother took the enricher off and it's extended but you can push it in. He didn't have time to check the valves and didn't have a set of feeler gauges on him. But could they go out overnight? I mean, it ran beautiful home from filling up, then no start the next morning.
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Post by 90GTVert on Jul 14, 2014 10:33:20 GMT -5
If the enricher is extended when cold it's no good. It should extend with heat and contract again when cold.
Usually it'll be harder to start as the valve clearance changes, but it is possible to show it face suddenly.
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Post by genseeker on Jul 14, 2014 13:51:55 GMT -5
K, so first thing should be to order a new enricher. Hoping that fixes it, my son would be so happy.
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Post by genseeker on May 5, 2015 2:21:36 GMT -5
This is way overdue but my son never got around to doing anything with the scoot. However, my younger son is having issues with his 250 Tank so I got the Jonway back from my older son. We put a new enricher on it and fresh 93 octane and still having problems.
My brother is doing the work for me, btw. He got it to start by priming it with carb cleaner. It's been sitting around 1 year not running so he figured that would be the best way to prime it. Got it started but it only stays running as long as the starter is actually engaged. As soon as you release the electric start switch, it dies, even with twisting the throttle.
Any ideas?
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Post by Elektrey on May 5, 2015 5:44:55 GMT -5
does it stay started once started?
maybe valves making it hard to start?
does it start better with a little throttle?
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Post by genseeker on May 5, 2015 13:42:45 GMT -5
it starts but it will not stay running at all unless the starter is actively engaged. Giving it gas doesn't keep it running, switch off the starter and it dies.
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Post by Elektrey on May 5, 2015 14:02:14 GMT -5
compression check? sounds like your getting spark and fuel.
could be the valves need adjusting though I'm not sure about 4 stroke stuff.
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Post by genseeker on May 5, 2015 14:36:10 GMT -5
might be in the starter switch itself - he disconnected the battery and it stays running. we've got a parts scoot so we may try pulling the starter switch on it and see if that solves the problem
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Post by genseeker on May 5, 2015 15:14:52 GMT -5
found the problem, the actual start switch had come loose and the kill switch was loose as well
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