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  #21  
Old 08-22-2020, 05:28 PM
rtrainer rtrainer is offline
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So I took the carburetor apart. At least to the extent that I could without getting into the choke plate, etc.. Sprayed a good bit of carburetor cleaner into every hole I could find to be sure none were clogged. Put it back together and back on the engine. It fired up and ran great for 2 minutes and then died.
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  #22  
Old 08-22-2020, 07:32 PM
Dart1917 Dart1917 is offline
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Put a little gas in a squirt or spray bottle and when it starts to die give it a little shot into the carb. If it keeps running then you missed something cleaning the carb. If it still dies check for spark right away. I doubt it's your problem but the coil can fail when they warm up and then work again when they cool. The engine will usually run for 15-20 minutes before the coil fails and takes a half an hour or more to cool. I think you missed something in the carb.
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  #23  
Old 08-23-2020, 09:13 AM
rtrainer rtrainer is offline
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I will try that later today. It is interesting that you mention the coil because if I let it sit, it will start up and run for the 2-3 minutes. Only thing is that I doubt that it heats up in the short time the engine runs. I did get a rebuild kit which will be here tomorrow.
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  #24  
Old 08-24-2020, 01:22 PM
rtrainer rtrainer is offline
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Got a rebuild kit and rebuilt the carb this morning. Started great and ran longer than the 2-3 minutes it had previously. Thought everything was good until I rode it around that yard a couple of times (~10-15 minutes) and it died.

How do I check the coil (which is about the only thing left)
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  #25  
Old 08-24-2020, 03:05 PM
rtrainer rtrainer is offline
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I was able to restart it and get it back in the garage after I let it sit for a bit. I then let it run. It ran for 2 minutes and died. I then pulled the spark plug wire off and tried to start it. I got a good spark. So I am guessing that this rules out the coil.

What's next?
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  #26  
Old 08-24-2020, 09:50 PM
Dart1917 Dart1917 is offline
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Another possibility is a sticking valve. The stem can get dirty and it will move OK cold but get tight when hot and stick open, then free up enough to run when it cools a little. Some engines you can see the valves through the spark plug hole, I don't know if you can on yours. If you can, be ready with the plug wrench and run it till it quits, then pull the plug and crank it over and see if the valves are going up and down. It's usually the exhaust that sticks. If you can't see them try holding something over the plug hole to see if you can feel any compression when you crank it over.
Before all that, did you try gas into the carb when it starts to die? It could still be a fuel issue, although your 10-15 minute run from cold and having spark when it quit is making me lean toward a sticky valve.
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  #27  
Old 08-25-2020, 08:54 AM
rtrainer rtrainer is offline
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I did not try spraying gas in the carb when it dies yet. But will give it a try today.

One thing that concerns me is that the length of time that it runs is almost always the same. I haven't timed it yet, but it is fairly consistent.

As I said, I replaced the fuel inlet needle and blew air through every orifice I could find. If it is a fuel delivery problem, where could it be? What more cleaning can I do to try and fix it? I did get a knock off carb for $20 which I would like to try as a last resort. Last resort because I would like to be able to return it if I can find the root cause to me problem.
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  #28  
Old 08-25-2020, 09:12 PM
Dart1917 Dart1917 is offline
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You replaced the needle but did you replace the seat? If you didn't remove the seat there could be something hanging up behind it. The shot of gas into the carb will confirm if it's fuel starvation or something else. If the gas doesn't keep it from dying and you have spark then the only other thing I can think of is a sticky valve.
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  #29  
Old 08-25-2020, 11:26 PM
rtrainer rtrainer is offline
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So I shot some starter fluid in the carb when it started to dies and it didn't die. So I took the carb off/apart and am soaking it overnight.

More to come
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  #30  
Old 08-26-2020, 10:57 PM
Dart1917 Dart1917 is offline
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I looked at the manual and it looks like the float needle seat and the fuel inlet tube are pressed into the carb and not really removable. If that's correct there will be a little void between them in the carb body where a piece of junk could be hiding and be difficult to remove. Remember it's restricting flow not plugging it off completely so you may be able to blow through there without getting it out.
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