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9n cold starting troubles

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Ffinmich

02-20-2021 15:35:10




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Hello, I have a 9n, 12 volt conversion. It always runs great. Now lately when it's cold it won't start. Only way to get it started is to pull start it. Then it runs fine. I can turn it off and it will start easy then. But if I let it sit and get cold won't start and gave to pull start. Any ideas. Thanks




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showcrop

02-22-2021 03:40:24




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
Dry plugs means it is not getting adequate gas. When cold the fuel air mixture needs to be stronger. This is why you have a choke.



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duey

02-21-2021 21:28:18




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
MANY years ago Dad would often get the old 2N to start by pouring a teakettle of scalding water over the carb and intake manifold...anything to get the fuel to vaporize and ignite better. Of course the clutch was held down as well, just one less load for the starter to bear..... Many is the time when the clutch had to be carefully let out after it was running... I suppose it was 90wt... pretty stiff in central Minnesota cold.

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Indiana Ken

02-21-2021 20:29:06




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
You stated you checked the spark and it was good. How did you check the spark? Since it is not starting on cold days, cranking over with the starter, that is when/how you need to verify you have spark. Also, all the spark plugs must be in the engine to put load on the starter/battery same as when you actually attempt starting.

Sometimes with 12 volt conversions the coil and ballast resistor is not matched properly. In this case, you can have 12 volts to spin the engine briskly but the ignition is weak. Cold weather and cranking simply lowers the battery voltage enough, allowing the problem to show up in the ignition system. If this is the case, then the engine should pop right off when pulling the tractor.

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HarryVanderpool

02-21-2021 18:48:07




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
jimtrs said it perfectly: "One of the many many reasons you're having trouble could be you have a worn out engine with low compression."

Our N's are so darn dependable; we just expect them to go forever.

Spending some time conducting a compression test series can go a long way in diagnosis.

With even, high compression, a fresh carb and distributor service, your 9N will pop right off as designed, assuming your electrical and fuel systems are functional.

No other monkey-motion is required.

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Ffinmich

02-21-2021 16:50:41




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
Hi, thanks for all the replys. Checked spark, looks ok.took screw out of bottom of carburetor and looks like good fuel flow . battery fully charged. I even tried spraying starting fluid in the intake. And it won't even spuuter.plugs look dry. Any ideas. Thanks



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Den N Ms

02-21-2021 06:40:06




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
Ffinmich,You can try a trick I use to get a N started in cold weather.

#1 be sure battery is fully charged up.

#2 depress or block clutch petal down transmission in neutral when cranking over.

#3 Be sure you have no gas leaks.

#4 Heat intake manifold with a good propane torch (not carburetor) moving torch over intake manifold back and forth

for 2-3 minutes until it is good and warm.

#5 quickly turn on fuel,throttle 1/4 to 1/2 way pull choke .turn engine over 2 times,push in choke ,turn on ignition switch and start.
#6 Once started be ready to feather the choke if needed to stay running until it is warmed up

This always works fo me unless something else is wrong.

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jimtrs

02-21-2021 05:23:56




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
Quoting Removed, click Modern View to see

ff,

Pull starting always starts a tractor easier. The engine turns over faster and longer without any power drag from starter. Things warm up, loosen up. The engine doesn't flood as easily. One of the many many reasons your having trouble could be you got a worn out engine with low compression.

But it is extremely difficult to diagnose your problem without more info regarding so many variables.

Have you reviewed the recent plethora of posts regarding exactly this problem lately? Lots of info there.

If you haven't read the previous posts, or if you have, provide some info regarding some of the points made there. Especially Bruce's detailed reply in the first message I linked to. Then hopefully we can help you.

In just the last page and a half of posts:

..... 2N refusing or hard to start again

..... Why are 2Ns so hard to start in cold weather

..... My 8N

..... 48'...8N Won't start..

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showcrop

02-21-2021 05:22:56




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
You need a much richer mixture when it is cold. Take a spark plug reading to find out exactly where you are.



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wsmm

02-20-2021 17:52:32




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 Re: 9n cold starting troubles in reply to Ffinmich, 02-20-2021 15:35:10  
My 2N is almost impossible to start in cold weather, wouldn't start yesterday. Put a halogen light, 500 watt I believe, on a milk case an put it close to and shining on the carb and manifold. Left it on for an hour or two. Went out turned on the gas, ignition off, pressed the starter button and let it turn over 1 or 2 times. Turned the key on, about 1/4 throttle and pressed the starter button. Started right up with no choke and ran fine,

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