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IH 300 Utility Starting Issue

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Ben Pung
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PostPosted: Sat Mar 02, 2013 5:06 pm    Post subject: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Hi all. I have an IH 300 Utility (1956) that I have a strange issue with. It has never liked to start in the cold (40 and under). When I go out and try to start it, it will run for just a second and stall out. When I crank a second time, the top half of the carb gets frosty and gas starts dripping out of the bottom of the carb. I figured out this winter that if I run a hot air dryer on the carb for a few minutes, then blow some warm air into the air intake as I"m cranking it, it generally starts right up. Today I did exactly that and headed out to get my truck out of the mud (I"ve had a tough day). The tractor ran fine and normal all the way out to my truck. It was up to operating temperature by the time I got there. I chained it to my truck and started to lift the bucket and it stalled out. Now it won"t start again. I crank it and gas leaks out of the bottom of the carb. Blowing warm air on it does not good now. I checked my plugs and they don"t appear to be getting gas (not wet at all). Any ideas what would be wrong with it? All I can think is to take the carb apart and try to clean it, but I want to be sure I"ve tried all other options before I go down that road. I have a hard time finding parts for this thing and I don"t want to mess up the carb gaskets unless I"m sure it"s necessary. Thanks.
 
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old
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PostPosted: Sat Mar 02, 2013 5:19 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Couple of things to check so you head the right way. #1 check your spark and make sure it is a blue white spark that jumps a 1/4 inch gap or more. #2 check your air cleaner and make sure it is not full of water/dirt and maybe change its oil. #3 pull the carb drain plug and make sure you have a good steady flow of gas for a few minutes. Catch the gas to make sure it does not have water and or dirt in it. You after doing all those things try adjusting the main jet. Screw it in all the way then out say 4 full turns and if you have spark etc give it a try
 
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todd hamilton
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PostPosted: Sat Mar 02, 2013 5:28 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Yeah everything old said they are touchy and cold natured. Dad kept distributor cap, condenser, points and plugs on hand for the one at the farm. Also how stale is the gas in it. If it is ethonal blended over 90 days old I could see a 300 running bad real easy
 
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old
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PostPosted: Sat Mar 02, 2013 5:39 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

The 300U I have here has always been and easy start tractor as long as the spark is good and the other stuff I have said.
 
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5 Forward
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PostPosted: Sat Mar 02, 2013 7:11 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Acts like the ignition coil is weak and needs to be replaced. I have a 300U I just purchased and noticed condensation forming on the manifold about the carb before it warmed up. You may also have a icing problem and that why the blow dryer helped.
 
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LynnKaufmann
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PostPosted: Sat Mar 02, 2013 7:29 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

I would suggest installing a Pertronix Igniter ignition replacement system for about $90.00. Very easy to do and now you do not have to worry about the points and condenser. This way the ignition system will give you a very good spark. Only thing additional is be sure your coil will produce a good ignition spark. Do not use anything other than a stock coil with this system. You can check the coil by taking the wire going from the coil to the points and very quickly touching it to ground and then removing it from the ground (opening and closing the circuit), just like the points would do. If you get at least a 1/2" spark out of the coil wire (being held with this gap from a good ground), then the coil should be fine. Boy does this help my 300 with starting in all types of weather.
 
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504
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PostPosted: Sat Mar 02, 2013 7:29 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Its an IH, choke the crap out of it.
 
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todd hamilton
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PostPosted: Sat Mar 02, 2013 7:44 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Ours sure wasn't they used to but a block under the loader bucket when parking it in anticipation of pulling it to start. I remember distributor caps being problematic (this in the 70s) now if the spark was good like you said ran great but still cold natured to start. I agree all ih cold natured, choke and let them warm up.
 
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Ben Pung
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PostPosted: Sun Mar 03, 2013 3:21 am    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Thanks for the pointers. I'll try the various things in this thread in easy to hard order and post back what I find. I appreciate the help....
 
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Charlie M
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PostPosted: Sun Mar 03, 2013 5:39 am    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Couple of things besides what others have said - I'd check to make sure the choke is closed when you pull the cable. As far as gas running out of the carb, I think all the old IH's will do that if you crank much and they don't start.I wouldn't worry about that one.
 
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old
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PostPosted: Sun Mar 03, 2013 9:29 am    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

The 340 we have I have to choke it real good and play with the choke after it starts till warm then it runs good
 
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Ben Pung
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PostPosted: Sun Mar 03, 2013 10:10 am    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

OK, here's the update. Taking the info on this thread, I went out to check for spark. I pulled a plug and tried grounding it to the engine block and seen no spark. So then I took the wire that goes from the ignition coil to the distributor cap and pulled the end out of the cap and tried grounding that and getting a spark, but didn't get spark there either. So at this point I'm thinking the issue has to be the ignition coil itself, the generator, or the voltage regulator. Is this accurate? How can I narrow down the culprit? I'm an electrical idiot so I'm not sure the best way to test these parts...

I also cleaned out the air cleaner, pulled the plug in the carb and let gas run through, and messed with the choke and the main metering needle and they seem OK as far as I can tell.

Another side note. Why would stalling the tractor out cause this to all the sudden happen? It was running fine until I stalled it trying to pull my truck out of the mud. Then this...
 
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AJB-830
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PostPosted: Sun Mar 03, 2013 10:43 am    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

Ben, I also have a 300 utility. About twice a year it will just stop like you turned the switch off. If I clean the points with some contact cleaner, it will start right up and run good for another 6 months or so. At one time I would replace the points when this happened but found out that just cleaning the points would be just as good. I also have a 350 & 450 gas and these don't do that. Only difference is the 300 is still an original 6-volt tractor. You get no warning when this will happen as it starts and runs real good the rest of the time. Anybody else know why this might be happening? Al
 
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Ellis Kinney
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PostPosted: Sun Mar 03, 2013 12:31 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

I think that when they quit like you describe, it is a fuel problem. The reason I think that is when the carb. runs dry, for some reason the float sticks and causes gas to drain out. My opinion based on my M. Ocaasionally like a dumb butt, I will forget to turn the gas on and it will quit. Then it leaks gas like yours. Hope this helps. Ellis
 
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MARK ROBKE
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PostPosted: Sun Mar 03, 2013 2:59 pm    Post subject: Re: IH 300 Utility Starting Issue Reply to specific post Reply with quote

I too have a 300 utility, 6 volt system,7300 hrs+. The wiring is origional (cracked insulation, etc). It will frost the carb too in cool damp weather and runs better after the frost melts. But it always starts right up to 10 above. I change the points and plugs about every 2-300 hrs. It is cold natured and likes the choke, but it will run smooth and pull right out of the barn if I partially choke it. So first of all I wonder if your choke closes fully when you pull the cable out and opens fully when you push the cable in. You can observe this externally with the lever on side of carb, or remove the intake hose.
Secondly take a test light (or volt meter) and measure voltage at battery side of coil with key on. If no voltage you have lost power (voltage) from key, if ok check distributer side of coil at the points inside the cap; open and close points with a screwdriver, without grounding out the points, hold the coil wire 1/4" from block and if all is well it will spark when you work the points with screwdriver and your test light on the points go off and on. You can have a bad coil. You can have a bad condensor which will ground out the points. Your points can be out of adjustment. They set at .023 on high part of the lobe. The points rubbing block has to be on the flat part of distributer lobe to make it spark with screwdriver. You also can have a bad rotor button which won"t let the spark go thru to each terminal inside the cap. It is not generator or voltage regulator related.
As far as why = coincedence?
I hope this helps ; I don"t type well and understand things way better than I explain them.
Good luck, MARK.
p.s. I have had bad points before, brand new.And bad condensor.
 
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