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post #1 of 24 Old 07-21-2019, 06:15 PM Thread Starter
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John Deere 314 Shuts off while mowing.

I've had this mower for a few years now. Passed down from my dad who got it from a good friend who bought it new. Anyway, it's been running pretty great up until a couple of weeks ago. Now while I am mowing, the engine will stall. It seems to be fine when I first get going then after a few minutes it cuts out. It will start again but it seems to stall out progressively quicker the longer I mow. It seems to run fine with the pto off. I've tried turning off the pto before the engine stops when it starts stalling but that makes no difference. Adjusting throttle and choke get the same results. I can usually start it back up within a few seconds. Here's some of the stuff I've checked:

Metered the Ignition coil: 6.3 to 7ish ohms

Metered the condenser: showing an open circuit

Jumped out the safety seat switch: made no difference

Going by another post I had read on here, the coil and condenser seem to be suspect. In that thread, someone had mentioned that the coil should be about 3.6 ohms. there was also mention that the condenser should have readings other than open circuit. I'm kinda leaning towards replacing those two components but wanted a quick second opinion first. I'm not sure how specific replacement condensers are. I also would like to find a coil replacement that isn't going to bankrupt me but not be trash in a month. Any help would be appreciated.
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post #2 of 24 Old 07-29-2019, 06:50 PM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

Update:
changed out the condenser and it seemed to make no difference. Actually, now the tractor will turn over but not stay running for more than a second or two. Tried changing back to the old cap with no change. Checked the points and they look trashed. looks like the moving point had slid off the other one to one side many many times. Now both points are mashed down on opposite sides making the occurrence of sliding almost guaranteed. tried finding them locally yesterday but had limited options. went ahead and filed them down the best I could. Threw them back on for now but same result. Engine turns over but shuts down very quickly.

Update 2:

Found a promising cross reference for JD/Kohler part numbers here:
Cub Cadet FAQ

gotta do a little research but I hope this is the ticket to getting this fixed without breaking the bank.

Last edited by sgurski; 07-29-2019 at 07:06 PM.
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post #3 of 24 Old 07-30-2019, 10:28 AM
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Re: John Deere 314 Shuts off while mowing.

I had a 314 for a few years and I can highly recommend what is now called the "Trandenser II" from kirk engines. It used to be called a points saver. It drops the amount of current going through the points by 90% and essentially will make your points last many many years and possibly the life of the engine. I installed that along with new points and condenser, adjusted the points after install, and didn't touch the points again while I owned the machine.

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post #4 of 24 Old 08-02-2019, 07:13 PM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

Well, I purchased a kit from amazon that included the points, condenser and coil. Got those installed today and no go. engine will not start. Maybe it's a gas issue... Just don't know. I'm glad i replaced all the other stuff as it was all worn and well on it's way to being a problem if it wasn't already. Just a bummer I won't be up and running this weekend. I really don't want to push mow 2 acres. Gonna get a squirt bottle of gas and shoot that into the carb. See if it turns over. Unless anyone else has any good ideas.
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post #5 of 24 Old 08-02-2019, 10:13 PM
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Re: John Deere 314 Shuts off while mowing.

Do you have the manuals for the kohler K321?
operators manual http://www.kohlerengines.com/engines...1346_c_all.pdf
service manual http://resources.kohler.com/power/ko...df/tp_2379.pdf

I'd start with those and running through the suggested diagnostic tests

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1980 JD 314, 46" deck (sold)
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post #6 of 24 Old 08-03-2019, 08:02 AM
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Re: John Deere 314 Shuts off while mowing.

back when my 210 kept stalling I fired it up parked it outside & let it run till it stalled, I already had the side panels off & a test light ready to go to check for a bad connection. so about 20 minutes later when it stalled I was ready, started at coil, no power, went to main engine connection, no power coming out, had power going in, found it. took connection apart ( which was a bit warm ) cleaned up terminals, pinched female terminal just a smidge. plugged connector back together, never stalled again.

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post #7 of 24 Old 08-04-2019, 04:04 PM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

Thank you Cole for the links. I will definitely check those manuals out. I'm kinda leaning toward what burned300 is talking about at the moment. I picked up an ignition tester (light that hooks up between spark plug and coil. I get a flicker when I turn the key then nothing while cranking. It appears I am getting no spark.
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post #8 of 24 Old 08-17-2019, 07:27 AM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

The saga continues... I picked up a spark checker from Harbor freight. Found that I wasn't getting spark when I was turning the key. Talked to a buddy at work and he said make sure the points are breaking. Sure enough, they were not. Adjusted those and now the engine will turn over, I get spark, and the engine will start... until I let the key go from start to run. After fixing all of the problems I introduced I think I am back to the original one. So I started checking continuity. Everything looks good from the run contact on the switch all the way to the solenoid. I'm down to the key switch and the solenoid. I think I'm going to replace both just because the key switch looks like crap and the solenoid is cheap. I did test continuity through the switch and it looked good but at this point i figure what the hell.
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post #9 of 24 Old 08-17-2019, 07:31 AM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

I wrote the previous post quite a bit ago but it never posted. anyway, I think I have finally found the definitive cause of my issue. Key switch! Hunkered down and started beeping out wires again paying close attention to the wires around the key switch. Even unplugged the keyswitch and beeped out the contacts. realized that if i didn't have pressure on the key when in run mode, I would lose continuity. Bam! I'll get that replaced and update hopefully soon.
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post #10 of 24 Old 08-17-2019, 02:46 PM
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Re: John Deere 314 Shuts off while mowing.

Electrical problems are the worst to track down because of all the interplay between components. Glad you have the search narrowed down to the switch.

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post #11 of 24 Old 08-18-2019, 04:35 AM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

Well, after addressing a cascading group of failed items, i'm back to square one. Tractor is still stalling after a few yards of mowing. Dang thing runs fine without the pto engaged. The bummer is I didn't run this test, my wife did. She wasn't really thrilled. Does anybody think there is a chance that the voltage regulator could be the culprit? The battery isn't dead by any means. Is there a temperature sensor anywhere? I've noticed a round coin-like spot on the voltage regulator that sticks out engine side through the cooling fins. is that just for internal component cooling or something else? Maybe I need to have another look at the fuel pump. *Sigh*
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post #12 of 24 Old 08-18-2019, 07:55 AM
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Re: John Deere 314 Shuts off while mowing.

Sg, I wouldn't look at the fuel pump. Sounds like pto coil might be "going south" and drawing more amperage/voltage than the battery and charging system can supply. Unplug at pto coil and ohm out the coil...should be around 3.8-4 ohms. More ohms are OK but less takes a toll on electrical system...enough to eliminate spark from the coil!

Next would/could be stator windings or regulator. With key "On" & tractor not running, check battery voltage...,should be around 12.5+. Start tractor, warm for a few minutes, and go WOT. Check battery voltage...should be 15ish. If still about the same as tractor not running, pull connector on regulator loose, not off. Take AC readings (at WOT) on outer terminals...should be around 40-45volts AC (make sure meter is set to AC!!!) Last, check center terminal voltage...DC now!... should be around 15vDC at WOT. This would be from center terminal to ground, not battery neg post.

If your battery holds up for a season or more, I'd bet it's your pto coil. Check things out and get back. Bob
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post #13 of 24 Old 08-18-2019, 08:44 AM
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Re: John Deere 314 Shuts off while mowing.

well Dang. Sounds like no fun to me I can't stand electrical problems. I'm following along so gain some knowledge. I don't have a real suggestions that anyone else hasn't already put in here.

Good luck.

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post #14 of 24 Old 08-24-2019, 07:58 PM Thread Starter
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Re: John Deere 314 Shuts off while mowing.

Finally got the clutch coil pulled this morning... Couple of really nasty spots on it. I hope to set the gap and get it back together tomorrow late afternoon. Just wanted to throw an update out there.
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post #15 of 24 Old 08-24-2019, 11:39 PM
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Re: John Deere 314 Shuts off while mowing.

Pics of the nasty spots. That way we can say ok, repair, or replace.

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