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Dies while working

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Russell TX

02-26-2001 19:34:01




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Have been working my 9N hard last few days discing deep sandy fields. After about 1 hour of work today, the engine died as if it had run out of gas. It started easily right away, but died within about 1 minute. Started and ran a few times and then died each time. Just a few weeks ago, I dropped the gas tank and cleaned the vent hole which appeared clogged. It is now acting in a similar way, but I can't believe something would have got back up in there already. It really appears as if not enough gas is being fed into the carburetor. The fuel regulator and bowl are only about one year old and I have checked all three gas filters. Anyone have any other ideas? I haven't run it again this evening, but I'm thinking this may only happen when the engine is worked hard for 45 minutes to an hour.

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Snowplow

02-27-2001 13:40:17




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 Re: Dies while working in reply to Russell TX, 02-26-2001 19:34:01  
Could be the coil. When they get hot it dies. If you let it cool even a short time it will run then dies again.



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norm-wy

02-26-2001 20:41:18




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 Re: Dies while working in reply to Russell TX, 02-26-2001 19:34:01  
Russell
You might have an ignition switch thats going out when it heats up. Try using a jumper wire (a short piece of wire with two alligator clips on it) around the switch next time it dies and see if it starts right up again. If so replace the ign switch. You also may have a coil failing as it heats up. Best way to check it is to replace it and see if the problem goes away. HTH



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Russell TX

02-26-2001 21:02:40




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 Re: Re: Dies while working in reply to norm-wy, 02-26-2001 20:41:18  
To Norm and Patrick: Thanks for the input. That's three of you guys mentioning the coil. I know it's been on there as long as I have had it (15 yrs). Does it make sense, however, that it will start up immediately after it dies and run for a minute and die again? I know these electric parts can do some funky things. To rule it out, I might go get myself a new coil tomorrow and see what it does. Thanks

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Patrick

02-26-2001 21:23:22




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 Re: Re: Re: Dies while working in reply to Russell TX, 02-26-2001 21:02:40  
The resistor or coil can cool enough from the time it quits to the time you restart to allow it to start.

In any electronic component, there is an outside operating range. That is, at some instantaneous point of temperature, any electronic part will begin to break down and the compounds that make up the part lose its operating characteristics. Cooling the component every so slightly will bring it back in to operating range.

Being an electronic engineer, we used to use hair dryers in the lab to find those break points and measure them to determine the quality of the parts.

Hope this helps!
Patrick

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Patrick

02-26-2001 20:39:42




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 Re: Dies while working in reply to Russell TX, 02-26-2001 19:34:01  
I experienced a similar problem w/ my 8N. It turned out to be a resistor used with the coil. (I had an older 12V system with a generator). It was bad and as it heated up, it would produce a direct short.

I do not know whether or not 9Ns have this. But, check it out.

It drove me nuts for weeks!



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Russell TX

02-26-2001 21:06:16




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 Re: Re: Dies while working in reply to Patrick, 02-26-2001 20:39:42  
Appreciate the input. See my response to norm. Thanks.



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Al English

02-26-2001 19:59:57




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 Re: Dies while working in reply to Russell TX, 02-26-2001 19:34:01  
Hi Russell, It sounds like a fuel problem to me too. And, it sounds like you've already addressed all the trouble spots. But just to confirm that fuel is getting to the carburetor disconnect the fuel line at the carb. and run a gallon or so into a container(with the gas cap on). If there is a good steady flow that doesn't decrease, the problem is elsewhere. Sometimes a bad coil will work until it gets to a certain temperature then quit. The other thing that came to mind was vapor lock. Make sure your fuel line isn't too close to the exhaust. Good luck...Al English

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Russell TX

02-26-2001 20:49:18




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 Re: Re: Dies while working in reply to Al English, 02-26-2001 19:59:57  
I'll try your suggestion. I have removed the line from the carb before but only long enough to ensure gas was making it to the carb. I'll let more gas run through to see if the stream stays constant. With the coil, if it were to be cutting out due to heat, could it start back up right away like it is doing? Thanks again - I'll keep you posted.



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Phil (AZ)

02-27-2001 08:07:50




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 Re: Re: Re: Dies while working in reply to Russell TX, 02-26-2001 20:49:18  
Russell, Your Problem sounds like mine after the winter
layup. The Needle Valve(Float Assy) hanges up.
A couple of Raps on the Carb generally fixes the
sucker. (Opening the Drain Plug when she quits should Confirm that she is dry)

Hope this Helps



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