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Post by hilltopper2 on Sept 4, 2011 8:30:32 GMT -5
I have a Alpha Sport Argon that has been setting for a year or more. I cleaned and sealed the gas tank, cleaned the carb., checked the compression (120 + psi), and am getting spark. It will fire once when you first put the spark plug in. After it fires once, it won' run, I can take the plug out, it is wet, I dry it off and put it back in and sometimes it will fire sometimes not. How far should the mixture screw be backed out on the carb to start with? Also could I have a timing problem? How do you check the timing? I haven't seen any posts on timing issues. If it isn't timing can anyone offer any advice on what i need to check next. Could the reed valves be leaking by?
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Post by 90GTVert on Sept 4, 2011 9:00:22 GMT -5
Anywhere 1-2 turns out should be fine as a starting point for the mix screw. I don't think that's gonna be the trouble. I doubt it's a timing issue. It would be more likely to be a weak or intermittent spark than timing setting, and I wouldn't start there either. If the reed valves don't seal it will do this. They'll let too much fuel by and flood the engine. It would definitely be worth checking the reeds.
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Post by hilltopper2 on Sept 4, 2011 11:25:21 GMT -5
How do I go about checking the reed valves?
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Post by 90GTVert on Sept 4, 2011 11:55:24 GMT -5
Remove and inspect. They're under the intake manifold so you take that off and then you can get to them. They should be seated against the reed block. You will need new gaskets and/or a sealant when you reinstall everything.
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Post by hilltopper2 on Sept 4, 2011 15:14:06 GMT -5
where you recommend I try to find a new gasket. There aren't any scooter shops in my area. I guess I could order one on line if I can find one. I could make one if I can find some gasket material. If I can't find some what type of sealer should I use? RTV? thanks
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Post by 90GTVert on Sept 4, 2011 15:30:24 GMT -5
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Post by MAReames on Sept 4, 2011 16:22:05 GMT -5
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Post by hilltopper2 on Sept 5, 2011 10:28:40 GMT -5
I went back and cleaned the carb again, soaked it all night, washed it off, sprayed with carb cleaner and blew out with compressed air, put it back together adjusted the mixture and idle screws. Check the reed valves, they look like they are seating fine. I checked the spark again and the compression, 120psi. It will try to start some of the time, but I can't get to run. The bike only has 1201 miles on it. I hope some of you can give me some pointers of where to go from here. Also I looked for the ID numbers engraved on the engine and of yet haven't been able to find them. Any idea where they may be. The only think I can find is ARO3-107756 which I thinks relates to the title number.
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Post by 90GTVert on Sept 5, 2011 10:45:03 GMT -5
Yours should have a 1E40QMB from what I'm seeing searching for your model, but here's some engine ID info anyway... 49ccscoot.proboards.com/index.cgi?board=gentech&action=display&thread=2359120psi is plenty of compression to start easily. Nothing clogging the airbox? Will it run for a while the first time it fires or does it just die? If it runs for a bit and then dies maybe it could be an auto enricher issue, letting too much fuel in for a warm engine?
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Post by 2strokd on Sept 6, 2011 7:29:07 GMT -5
Some of the mina,s just arent stamped with anything. Ive seen them without any engine ID numbers.
Last resort for me usually but have you tried starting fluid?
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Post by hilltopper2 on Sept 6, 2011 17:08:28 GMT -5
I finally got it started with the help of a little spray. I ran and would start up with just one kick every time. Let it sit overnight it fired on the first kick but wouldn't start after that. A little more spray and it started right up and after that it would start up every time I tried. I am wondering if the auto enricher is not working or is something else going on. Also how does the fuel tank gauge work? The float sending unit is working (the resistance changes with the position on the float.) I saw a wiring diagram somewhere on the forum, but can't find it now.
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Post by 90GTVert on Sept 6, 2011 19:41:28 GMT -5
Fuel gauge is a pretty simple system so if the sender is working the gauge is probably faulty or the wire is not connected. DIAGRAMSSounds like it would be worth checking the enricher out.
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Post by hilltopper2 on Sept 7, 2011 19:37:20 GMT -5
Let it sit overnight again and the samething, fired once and wouldn't start without some spray. Checked the enricher and it extended like it should. Did take a voltage reading on the plug and it was less than one volt. Why won't it start back up after sitting for a while, but after it starts the first time it will start right back up.
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Post by 2strokd on Sept 8, 2011 16:03:37 GMT -5
Try turning the air/fuel mixture screw in a half turn.. It might need the idle turned up slightly as well? That could be all you need? I know my Cobra is air/fuel mix sensitive. Half turn too much one way and it will load up if you sit too long at idle. Too far the other way and it is hard to start when cold and idles way too high until it warms up all the way. There is a 1/4 turn sweet spot on mine.
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Post by hilltopper2 on Sept 9, 2011 20:58:46 GMT -5
I have been measuring the length of the auto choke and the depth on the seat the needle goes in and it appears that the needle is seated in the seat when the choke is cold. If that is correct no wander it wont start when it is cold. Does anybody out there have a spare choke and carb that they could measure the length the needle sticks out of the auto choke and the depth of the seat in the carb that the needle goes in.
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