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Update: 2N died; won't restart

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Ron

11-05-2002 07:40:15

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46 2N, 6V, front mount system. Mowing for ~45 minutes and just died with no warning. Let sit overnight ans still wouldn't start. However, at first crank it fired and acted like it wanted to start but wouldn't. I checked the following:

jumpered the ignition switch but still wouldn't start,

checked gas flow out the bottom of carb and got a steady stream,

removed a park plug and got spark when cranked starter,

measured voltage at top of coil and got ~6.3V and ~3.5V. I assume this was with the points open and closed, respectively. Also, I think this is what I'm supposed to get if the coil is functioning properly.

I had 15-20psi oil pressure when engine died and get oil pressure starting to rise when I crank the engine.

Does anyone on this great forum have any additional troubleshooting steps to take? Maybe compression check? I don't have a tester so would have to buy one.

Thanks in advance for any input.

Ron

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Danny in CO

11-06-2002 08:48:00

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

Ron,

Try a shot of Starting Fluid (ether). If it starts, you have a fuel problem. Could be something in the carb.

If it doesn't start, most likely electrical. Could be the coil.

Danny

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HARRY(GA)

11-05-2002 17:00:39

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

My 9N died in the exact manner you described. After going through basically the same procedure
as you with the same results,I finally determined
that the problem was indeed the coil.

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Dave OH

11-05-2002 16:36:28

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

Most common problem with front mount distributor is a crack in the cap. Don't know if you checked all cylinders for spark and as Dell said a strong spark.
Dave OH

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OH Boy

11-05-2002 12:48:25

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

My 47 2N behaves that way sometimes when it gets just the smallest amount of moisture around the coil and distributor. When I pull the coil off and wipe it all down to make sure everything is dry, it starts right back up. just a thought.

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DavidO

11-05-2002 10:01:42

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

OK. Pretty good job of running initial tests. Since they did not reveal the problem, time to go a little further. First, as others have already stated, the quality of the spark is important. Also, you need to be sure that you are getting a good spark at all four plugs. If you just held the wire near a ground, you didn't really test to see if the plug itself sparked. You should pull the plugs and, using an insulated tool, hold the plug against ground and see if the spark jumps the gap. Test all four to be sure you don't have a bad plug wire, dist cap, etc. Given a good spark at all plugs, I think a compression check would be in order. As someone else suggested, it you do not have a compression guage, holding your thumb tightly over the spark plug hole and have someone push the starter button. If the compression is strong enough to push your thumb off, low compression is probably not what is causing it to not crank. Test all four cylinders. A stuck or burned valve or stuck rings on a single cylinder could cause your symptoms. If these tests do not reveal the problem, you may need to get a compression testor and get some numbers down, dry then wet, that we can look at. Spark, fuel, compression, + correct timing equals a running engine. Good Luck, be patient, and remember "Never let the machine win".

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Ron

11-05-2002 11:35:42

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Re: Re: Update: 2N died; won't restart in reply to DavidO, 11-05-2002 10:01:42

Thanks for all the inputs. My next step will be to get the coil checked by FNH. They say they can check the coil with battery, load, plugs to determine it's condition. I don't know if this is any better than me checking voltage with it installed in the tractor, but at least it's free and is a second opinion. Right now, I'm kind of in limbo since the tractor is sitting in the middle of a pasture and it's been raining all day.

Ron

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Brian-2N

11-05-2002 09:10:42

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

Ron,
Sometimes we overlook the obvious. Check the fuel level. If there is one gallon or less, it will die and won't restart, although it does sound like it wants to do so, unless the flow knob is wide open, not just 2 turns.. Add a few gallons and retry, before you try anything major. Trust me, it's happened more than once to me.

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best guess?==bj/8n/mt

11-05-2002 08:00:27

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

Sudden shut downs almost always turn out to be electrical. When you say you have fire at the plugs do you have a good quarter inch of nice blue white fire or just a little orange spark?

The top of coil voltages you report say your points and condensor are doing their job. Sounds to me like the coil is on vacation. If'n it were mine I would replace the coil.

Low compression is more likely to be a won't start trouble than a sudden shut down.

Your mileage may vary

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Dell (WA)

11-05-2002 08:00:04

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

Ron..... ...based upon your descriptions, everything kinda sounds good except for "removed a park plug and got spark when cranked starter".

Did it jump with a blue spark at least 3/16" and 1/4" is more better. If it jumped with just a little with an orange spark, ya gotts ignition coil problems even if you read 3.5 volts at coil terminal.

Did you try some ether "quick start"?..... ...Dell

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CJ in Michigan

11-05-2002 07:56:03

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Re: Update: 2N died; won't restart in reply to Ron, 11-05-2002 07:40:15

Try a "field compression test"-keep ignition off and press a finger down fairly hard over sparkplug hole and crank- if the compression pushes your finger off the hole it's probably OK-if you can keep it sealed, probably not.
testers at Sears- $24.00, get the screw in type, not the rubber cork type. Have you checked the timing-I believe it's 4"BTDC-
HTH

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