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Ford 9N, 2N & 8N Discussion Forum
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Choking air breather?

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8ngreenhorn

02-20-2005 07:17:53




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N stopped starting after changing oil. Greywynd suggested that perhaps when I put in too much oil, maybe I'm choking the air breather. I put the oil in the "tube" just above the dipstick which has a cover with filter inside. If I put in way too much oil- could that affect starting?

I do have gas and spark. So does the tractor.




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Jake In TX

02-20-2005 09:20:11




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 Re: Choking air breather? in reply to 8ngreenhorn, 02-20-2005 07:17:53  
whin I got gas and fire the next thing I check is the intake valve bening stuck



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8ngreenhorn

02-20-2005 07:51:11




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 Re: Choking air breather? in reply to 8ngreenhorn, 02-20-2005 07:17:53  
It's a 6-volt front mount. I pulled the plugs, which only have about 15 hours on them. They looked good and clean, so I regapped them. Put each one into it's ignition wire and placed it on the block as I turned the engine over. Each spark was white and I'm pretty sure it went from gap to electrode post and not to the side of the plug. I loosened the fuel line into the carb and gas is there.



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Jimmy D

02-20-2005 07:54:52




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 Re: Choking air breather? in reply to 8ngreenhorn, 02-20-2005 07:51:11  
Everything sounds good, but you need to verify that fuel is actually making it to the cylinders. Easiest way is to remove the breather hose at the carb, sqirt a small amount of starting fluid, carb cleaner even wd-40 will work for this test. If she hits like she wants to start, you have a fuel issue.



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8ngreenhorn

02-20-2005 08:08:31




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 Re: Choking air breather? in reply to Jimmy D, 02-20-2005 07:54:52  
I've tried the starting fluid without so much as a quick fire. I'm guessing my spark isn't good enough. Is the white/light blue spark sound strong enough? I'll check for vacuum leaks, too.



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Jimmy D

02-20-2005 09:46:02




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 Re: Choking air breather? in reply to 8ngreenhorn, 02-20-2005 08:08:31  
The white/blue spark sounds good enough. If your compression is good (90 lbs on each cylinder or better, can run lower, but not very good)you have fuel and spark, only thing left is timing and on a front mount distributor, you shouldn't be able to get that off far enough to prevent engine from starting. I hate to go back to this, but none of this is related to oil change. We need you to answer a few questions, sorry if you have already...I may have missed it.
1. What is the compression on all cyliders if you can tel us. ( low compression will prevent ful from ever reaching the cylinders, even when spraying starting fluid.)
2. Check your plug wires for correct firing order 1-2-4-3, distribtor turs CCW and the cap is marked for plug wires, just hook 1 to 1, 2 to 2 and 3 to 3, 4 to 4.
3.have you bench timed the distributor. (should not be necessary since unrelated to oil change, but then again...none of this is and you should start from scratch.)
4. This one is kind of out there, but bare with me...I have seen this before. Have you tested your spark with an extra spark plug with all 4 plugs installed? The reason for that question is I have found starter that was grounging the electrical system while turning the engine over with compression which was pulling voltage from coil down too low for spark, but would spark fine without much of a starter load.

Check some of these things and post back. I am sure with all of the knoledge on this board, the problem will be found.
Hope this helps-Jimmy

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Bruce (VA)

02-20-2005 07:40:37




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 Re: Choking air breather? in reply to 8ngreenhorn, 02-20-2005 07:17:53  
Well, I suppose if you put 6 gallons of oil in it instead of 6 quarts, it might make a difference..... but no, your oil change has nothing whatsoever to do with it not starting. Corelation is not causation. What Greywynd was suggesting is that you overfilled the air cleaner; even that would not stop it from starting. So, from the top, tell us what we are dealing with (6v/12v, front mount or side mount) as well as symptoms. Tell us what the spark looks like & how you confirmed that, and how you know it has gas.

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Jimmy D

02-20-2005 07:36:56




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 Re: Choking air breather? in reply to 8ngreenhorn, 02-20-2005 07:17:53  
I think he was proably talking bout the oil cup at the bottom of your carb breather. That should have nothing to do with yer oil change, unless you replaced that oil as well. If you think that is possible, just remove the hose from your breather to the carb. I would make sure you are using good plugs, if that was the issue, the plugs are likely fouled pretty bad and should be fuel soaked after your attempt to start with breather clogged from too much oil. You can check this by removing the plug, lay it on top of the engine with plug wire connected so that the plug is grounded. Turn over the engine and watch the spark at the plug electrode carefully. If spark is jumping from electrode to the side of the plug instead of to the gap bridge, plug is fouled. If you are in doubt, check the spark in this manner, using another plug you trust to be good and compare. I still think we are missing something that will make you laugh bout this once you find it.

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