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8n wont start please help!

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Rob Johnson

03-15-2003 20:27:34




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I have a 1950 8n with a side mount distributor, still 6 volt. Serial number (8n283937*)I just bought it a couple of days ago and it ran great until last night I was heading back to the barn and it just up and quit. I loosened the fuel line at the carb and fuel flowed freely. I put a meter on the coil and 6 volts were comming in. The previous owner put a fresh battery in and grounded negative. What kind of problems will that cause? Everything seemed to work fine with it that way. There was no screen in the elbow joint at the carb, so I took the carb apart and cleaned the sludge out of the bottom and sprayed carb cleaner in ALL the holes until I am certain nothing was plugged up. I put that back together, and still nothing. I also have a lawnmower spark tester and I tried all the plugs, they seemed to have a weak spark, but all of them sparked. I just read a reply about my rotor question. The person who replied told me that there should be very little play in the rotor or the shaft. I just ran outside and checked, sure enough ther was a siginifgant amount of play in the rotor, but the shaft had almost no play. I am told that the rotor needs to be pressed down firmly on the shaft, and snapped into place. Can any of you tell me where to find a picture of this? I do not have any manuals to refer to. I think I might have the wrong rotor, as the distributor looks fairly new, and the rotor has a sticker on the bottom of it that says "made in Mexico" Are there any suitable replacement rotors out there? Please help! Any info or help will be very, very, very, much appreciated!!

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raytasch

03-16-2003 03:25:50




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 Re: 8n wont start please help! in reply to Rob Johnson, 03-15-2003 20:27:34  
Side mount distributor with play & slop in the rotor? Install spring, distributor shaft, part #12213. This won't keep it from running or make it stop running but it'll sure make it run better.
ray



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Dell (WA)

03-15-2003 21:23:41




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 Re: 8n wont start please help! in reply to Rob Johnson, 03-15-2003 20:27:34  
Rob..... ....did you take your rotor off the end of the distributor shaft? You should notice that there is a notch in end of distributor shaft and that there is a corresponding titt inside the rotor that fits the notch. It should be obvious that the two fit together. And since it WAS RUNNING, I don't think you have the WRONG rotor.

While negative ground isn't great, you'll loose upto 40% of your sparkies, since it WAS RUNNING, thats not of immeadiate concern. If'n the genny was NOT POLARIZED correctly after installing the battery negative ground, you just may not be charging the battery and that would account for your weak sparkies test.

You can ALWAYS re-polarize again. Just quick spark your voltage regulator's BATT and ARM terminals together (they're side-by-side). Engine off. Your call wheather positive or negative ground.

There is merit to keeping your 8N like Henry originally made it, positive ground. You will need to check your sidemount sparkie coil and make certain that the coil polarity matches the battery polarity. If positive ground, coil positive goes to distributor terminal.

But generally, if any engine just "quits", that usually a result of bad electrics somewheres. One of the original N-Board contributors used to claim 80% of all N-Carb problems were found and solved in the ignition system.

I'm gonna assume that your 10 gal gastank has more than 1 gallon of fresh gas in it, doesn't it?BTW, the elbow filter is a cheap $3 part..... ..respectfully, Dell

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