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Ford 9N, 2N & 8N Discussion Forum
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It keeps dying.

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8N in KS

06-26-2004 09:14:19




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I went to go mow yesterday. After about 10 minutes, it started to lurch like it was out of gas. When I push the clutch in, its fine.

What gives?




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Jon in Mass

06-26-2004 12:58:31




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 Re: It keeps dying. in reply to 8N in KS, 06-26-2004 09:14:19  
Check your fuel filters - two at the tank plus the carb elbow. You might have something clogging them and reducing the gas flow.



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Rob

06-26-2004 10:43:18




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 Re: It keeps dying. in reply to 8N in KS, 06-26-2004 09:14:19  
There is a quick test you can do from the seat. Warm the tractor to normal operating temp. If it won’t warm up or maintain a constant operating temp then the tstat may be wacked.
Put the tractor in high gear and get her rolling forward just a little bit and at idle and then quickly pull the throttle to 1/2 speed. Do this with your good brake partially on. You brake because you want a heavy load on the engine as you give it lots of gas in high gear. You want to make it pull really hard. If the clutch slips then you’ll have to adjust or replace it.
1. If it backfires the fuel mix is too lean or you have a shorted ignition (pull the spark plug wires one at a time and watch for a regular spark without a miss) or sticky valves (you can hear a sticky valve).
2. Your timing is ok if you hear a constant slight pinging (spark knock). 3. If it doesn't ping set the timing and make sure the mechanical advance is free to operate. I hear that if the wrong screw is used on the points it can interfere with the mechanical advance weights. My weights were dirty and sticky but they cleaned up nice.
4. If it pings excessively then set the timing. If that doesn’t correct the pinging then pull all the plugs, clean em up, and set the gap. While you have them out take a compression test on each cylinder with the throttle full open. You are looking for 90psi minimum at starter cranking speed. If you get normal compression then you need to check and set that timing! If you have 140+psi pull the head and clean the carbon off it. Make sure the valve stems are not gummy. Low compression says ‘fix my guts’ or it’s a rebuild that isn’t broken in yet.
5. If the engine pulls evenly and there is no indication of late spark or excessive carbon, check the system for a lean fuel mixture.
6. If the engine pulls unevenly then check the spark at the spark plug boots. Watch the spark over several revolutions to see that it's a regular, blue, snappy spark and that it does not miss. You can do that while the engine is running.

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Dell (WA)

06-26-2004 09:59:32




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 Re: It keeps dying. in reply to 8N in KS, 06-26-2004 09:14:19  
Well Larry..... ..ya don't give me much to guess on, I flunked mindreading, just ask my ex-wife.

There are 4 common runtime issues. 1) runs for about 1 minute and quits, bad condenser; not yer stated problem
2) runs for about 5 minutes and quits, clogged fuel filters; not yer stated problem
3) runs for about 1 hr and quits, cures itself overnite, BAD ignition coil; NOT yer stated problem
4) runs for about 15 minutes and quits; sound like yer stated problem?

Gunked up ignition switch gutts. You doubt? next time it quits, jumper the ignition switch wires with a pre-made wire with alligator clippies. Unfortunately, N-Ignition switches are not as robust as we'd like 'em to be..... ....Dell, self-appointed sparkie-meister

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