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300u winter starting tip

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Brian Schoenber

12-22-2000 20:29:23




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I've got a 300u converted to 12v. When it gets cold here in Michigan--like now--she doesn't like to fire too well. She turns over, but won't fire. I was talking to some mechanic friends who have an old Cub and said they had the same problem. They told me the updraft manifold in very cold weather doesn't pull the fuel up to the cylinders because of the cold. They suggested throwing some hot water on the manifold then crank. Much to my surprise it worked pretty well!! Any comments from anybody out there?? Will this hurt anything?? Or is there a better suggestion?? I keep reading about all the M's and H's starting in the cold. Do they have a similar setup with the updraft manifold or am I having an isolated problem?? Thanks for any input.

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John In Iowa

12-23-2000 19:30:05




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
I have a 400 here in Northern Iowa. Since I have the high dome pistons in it. It needs a little help starting when it is cold outside( like it has been for the last week!!!!). First, I put an engine tank heater on it, and that helped a lot. The second thing was it has a 12 volt system on it a with a 6 volt resister for the points. What I did was hooked a relay up from the starter switch to put 12 volt to the points when you are cranking the engine. When it starts and you release the starter switch it goes back to 6 volts for the points. When you do this, you have to get the power from around the resister for the points and use the power from the starter to pull in the relay. If you try to get the power for the points from the starter, you will get feed back from the points back to the starter. I set this up after I overhaul it and it works Great!!

John In Iowa

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Al kunz

12-26-2000 09:17:37




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 Re: Re: 300u winter starting tip in reply to John In Iowa, 12-23-2000 19:30:05  
If this is a gas tractor I have the cure to your problem. I have this thing we call a ignitor. It replaces the points and condencer. and all fits under the distibutor cap. I have many friends that leave their tractor sit out side all winter in iowa,mich.north dakota all over were it is cold. The comments i get is that their tractor will start before the engine makes one complete revolution. If you would like more info leave me your adress and i will mail you more info

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john d - more hot air

12-23-2000 11:52:02




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
My M and SM don't like to start in cold weather, but they sometimes have to. I've found that on these tractors, putting my wife's old hair dryer on the left side of the engine where it can blow hot air up past the carb and manifold for 20 minutes or so can make a BIG difference.



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kev@IA

12-23-2000 11:28:35




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
I just got a magnetic oil pan heater, 200w, could stick it under the carb! NAPA sells it.
kev



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tiny

12-23-2000 08:03:44




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
I live in mich keep the A in the garage starts every time [if the battery is up ] i use it to plow the driveway. SO IT NEEDS TO.
MERRY CHRISTMAS TO ALL



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ekarbt

12-23-2000 06:15:17




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
I grew up on a 52 8N. We would heat the intake with a propane torch to get it started when cold. Not the safest thing in the world but it allways worked.



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JLE

12-23-2000 04:46:51




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
Where in Mich.?? Make sure the choke cable pulling choke completly closed, found this problem many times. Does it start alrite in warmer temps.



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Brian Schoenberg

12-23-2000 05:04:40




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 Re: Re: 300u winter starting tip in reply to JLE, 12-23-2000 04:46:51  
I live in the thumb of Mich. Just had the carb rebuilt and installed it myself so yes I can verify the choke does close all the way. It just seems to fire if there is some kind of heat on the manifold. Even starting fluid doesn't seem to do much without some heat.
Brian



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Denny

12-22-2000 21:02:35




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 Re: 300u winter starting tip in reply to Brian Schoenberg, 12-22-2000 20:29:23  
Your engine in your 300U isn't really much different than an H, and in this regards the M is a little worst because the manifold has a longer length of Updraft from the carb to the cyl. head. Anything you can do to get some heat in the engine will help cold starting. I have a block heater on my Super H, and it's inside so I can warm it up with the kerosene heater before I start it. It Pops right off as soon as I hit the starter, and even with the radiator completely covered barely gets up to temp when it's Zero out.

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