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8N Cold starting

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joe pulkowski

12-04-2000 09:01:09




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My 52 8N start great in weather abover 45 degrees, wet or dry. When it gets cold, it turns over, but has a real hard time starting. Any suggestions???




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Snowplow

12-04-2000 17:54:10




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
I start my 51 8N all winter long and a few simple steps seem to help.

1) Always have a battery in good condition. I have gone to using a portable 12V jumper for intitial starts most of the time.

2) Keep your tractor is good tune. New plugs if nothing else.

3) Go easy on the throttle. You can always give it some gas later. I start at just above idle. It might pop a little at first then stall. I then up the gas a little and go again. Don't just keep cranking it. You'll flood it and then a new list of problems arrises. I always add dry gas to my gas tank in winter!

4) Know your choke. Mine likes a quick pop when first starting then none.

5) When shutting off put the throttle on idles and choke stall it. This seems to leave a great set up for the next start.


Nothing here is anything fancy. Common sense.

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joe pulkowski

12-05-2000 07:04:07




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 Re: Re: 8N Cold starting in reply to Snowplow, 12-04-2000 17:54:10  
Snow Plow, ever had luck with spraying starter ether in the air intake. Dumb question, is there a good place to spray the ether on the 8N?



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Snowplow

12-06-2000 19:52:37




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 Re: Re: Re: 8N Cold starting in reply to joe pulkowski, 12-05-2000 07:04:07  
A little starter fulid in the tube is ok but just a tiny bit. I don't even have to take the tube off the filter housing, i just give it a shot. When doing this don't choke for the first few seconds. This brings in more air and your starter fluid with it.

Once in a real fit of idiotic rage I put a tiny shot in each cylinder to try overcoming a very badly flooded engine. It started but I almost blew the muffler off. First it popped, then sputtered, then POW.

I lived!
Good luck!

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acadianbob

12-04-2000 14:32:57




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
i find the secret is a motor oil with good flow characteristics when it's cold; e.g. synthetic like a mobil 1



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Yup!

12-04-2000 17:11:37




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 Re: Re: 8N Cold starting in reply to acadianbob, 12-04-2000 14:32:57  
There are three things that I can think of that cold effects. 1. The battery, as has been mentioned, because chemical reactions just take place slower as the temperature goes down. 2. The oil viscosity, as acadianbob has just said. 30wt. non-detergent oil is more like grease at 20 below. Just imagine your crankshaft having to "plow" thru that at any speed. :-)
3. The volatility of the fuel, which has not yet been mentioned. That is why you HAVE to choke a cold engine to get it to start. The fuel vapor to air ratio must be high enough to have combustion occur. Since less gas vaporizes as the temperature goes down, choking the carburator throws more gas into the air stream, a lot of which stays as liquid but the extra volume of gas adds to the amount of vapor available enough so that combustion will occur. That is why ether, which vaporizes more easily and at lower temperatures, is used as a starter fluid.

For most cases, the biggest issue, I think, is the oil which should be changed for the winter, unless you regularly use something like 10W-30 or 10W-40. Next is a WELL maintained battery, i.e. kept full charged as much as possible.

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Snowplow

12-04-2000 17:58:17




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 Re: Re: Re: 8N Cold starting in reply to Yup!, 12-04-2000 17:11:37  
I didn't mention oil in my post but it's a great point. I use 10w-30.

The choke issue is a funny one. I agree that a cold engine always likes choke but on my tractors (2 out of 3) if you choke too hard they flood.



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Fessman

12-04-2000 14:17:00




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
I replaced one of my battery cables and it worked great. I'll be putting the other one on tonight. Like everyone has said, connections must be clean.

Fessman



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norm-wy

12-04-2000 10:51:54




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
Joe
If you have not gone over the exterior of your electrical system recently it might be time. At lower temps it is surprising how much difference a few tenths or hundredths of an ohm of resistance will make in cranking and starting ability. I must admit that 45 degrees sounds like mid summer up here on the high mountain plains, but the same principle holds at your "cool" temps. Go thru and clean every connection so it is bright , shiny and tight; especially the battery terminals and connectors. You don't want any of that yucky black oxidation on any of the lead parts, ie posts and connectors. HTH

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Scott(Ks.)

12-04-2000 11:34:36




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 Re: Re: 8N Cold starting in reply to norm-wy, 12-04-2000 10:51:54  
Joe: norm-wy is right on. I had the same problem in hot summer. I went from one end to other taking wires off and cleaning connections. Don't miss the ones behind the tool box!! I also spray all the connections with color shield contact cleaner before tightening them up. Thats color t.v. tuner cleaner. Clean bright and tight and I read it here!! It worked well for me.



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WJ

12-04-2000 10:23:29




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
I had the same problem last year when trying to start my 8N when temperatures fell below 10F and read on this sight that if you heat the carburetor first by pouring warm water over it before hitting the starter, it would make starting much easier. Rather than use warm water, I opted to try it with a hair dryer and it worked great. The tractor now starts immediately every time I use this method. Keep in mind that your igntion system has got to be in good shape.

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Claus

12-04-2000 09:38:22




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
Assuming you engine is in good repair with a decent ignition system, then I would look at the battery next. Battery capacity declines rapidly with lower temperature. A 100% capacity at 80 deg. will drop to 40% at 0 (Zero) deg. and to 20% at minus 20. This is also where lotsa CCA (Cold Cranking Amps) comes in handy. Some manufacturers no longer use CCA and use CA... CCA is the discharge rate in amperes that is available at zero degrees to a discharge voltage level of 1.2 volts per cell. The higher the number the better the cranking ability.
Happy Motoring
Claus

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Claus

12-04-2000 09:43:35




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 Re: Re: 8N Cold starting in reply to Claus, 12-04-2000 09:38:22  
Cprrect CCA to read - Discharge rate in amperes that is available for 30 seconds from a fully charged battery, at zero deg. to a discharge voltage level of 1.2 volts per cell.
Happy Motoring
Claus



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Tom 8N396936

12-04-2000 09:16:18




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 Re: 8N Cold starting in reply to joe pulkowski, 12-04-2000 09:01:09  
Joe is she still wired as a 6 volt? These systems must be in excellent shape to work in colder climates. Give a shot at re-wiring and see how it goes. Its pretty cheap and may just do the trick. Realy helped my 8

tom



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dd8n359567

12-04-2000 09:26:55




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 Re: Re: 8N Cold starting in reply to Tom 8N396936, 12-04-2000 09:16:18  
After cranking and cranking and cranking.....I got the idea to play with the timing a little. I turned my distributer counterclockwise a little bit and it fired right up. I have not looked in the book yet to see which direction (advanced or retarded) I moved it but it sure got mine going and it was about 20 degrees that night. I still have the six volt system as well.



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