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Farmall & IHC Tractors Discussion Forum
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gas in oil, plugs fouling farmall H

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samray

02-01-2005 13:47:14




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Hi, I have a farmall H and gas is getting in the oil.The spark plugs have to be cleaned weekly, especially #3 . I have had the Carb rebuilt 3 times and nothing seems to help. I turn off the fuel at the tank when I stop the tractor , so is it possible for gas to get into the oil while running? Thanks for any help.




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dhermesc

02-02-2005 05:52:16




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
I had a similar problem with my 350 after having the carb rebuilt immediately after purchasing the tractor. Clean the plugs and it would run decent for a little while before it would start missing again, and the oil was thin and stank of fuel. The plugs would come out wet and black but not oily (althought the first time or two I mistook the soot & gas combo for oil). The fuel mixture set screw is supposed to be adjusted in 1/4 and 1/2 turns, I finally turned it in 4 or 5 turns and the engine evened out, it had been running so rich the fuel would foul the plugs and then wash down the cylinder(s). This was on an otherwise good engine that would produce 150PSI in each piston. I hope this helps with your problem, otherwise you might be looking at some expensive repairs.

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EricB

02-02-2005 05:44:12




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
You have enough suggestions here to keep you busy until spring. But if the plugs are fouling you have too much gas during operation. Try a hotter plug, and thinning your mixture. Both those may help starting.But DO DO DO drain the pan. Gas/oil/hot engine, in a confined space can send you and the tractor in opposite directions.



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brtx

02-01-2005 21:58:54




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
samray. dont mean to offend anyone. you are asking an honest question and it deserves an honest answer.we need a more revealing explanation to what is going on with your engine. hard to get started.and what color and how heavy if its smoking. the gas is defiately getting past the rings, but it could be from when you are trying to get it started also ,if its hard starting. by running a compression test and it comes out ok you can rule out the meachical side.when you check the ignition,proper plugs and checking for spark and thats ok , you can rule out the ignition. then go to the carb.also a factor could be how long you have had this problem and a little more history..its hard to tell what is wrong until it can be evaluated.keep us posted

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brtx

02-01-2005 20:25:57




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
samray all the posts have good points,but the fist thing i would do is get the oil changed before the washed that crankcase clean and wipes every oil bearing in the engine.you could be heading for a major$$$out of frame repair.run a compression test and reair as needed.check your ignition and repair as needed.but get that crap out of the oil pan.



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CNKS

02-01-2005 19:46:59




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
My dad's H got so bad that before he finally got it overhauled, a couple of plugs would foul within an hour. Temporary fix was to get plugs that "fired in oil", think the brand was stitts, or statts, or something like that, have never heard of them since -- but no gas in the oil. As mentioned below, I think you have a float problem.



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P Backus

02-01-2005 17:36:03




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
I agree with Novel Idea Guy. The carburetor has spit hole on the bottom so that any gas getting past the float would drain out of the carb before it got in the motor, unless it's running . In that case it would run very poorly from flooding.
My 2 cents, Paul



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JOSSETTE

02-01-2005 17:17:18




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
CAP ROTOR PLUGS WIRES POINTS COIL WIRING- HARNESS GROUND CABLE.



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Novel Idea Guy

02-01-2005 18:53:33




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 Re: gas in oil, plugs fouling farmall H in reply to JOSSETTE, 02-01-2005 17:17:18  
Gotta ask: What's the rationale for this? How will ignition parts stop gas from getting into the oil?



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JOSSETTE

02-01-2005 19:26:08




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 Re: gas in oil, plugs fouling farmall H in reply to Novel Idea Guy, 02-01-2005 18:53:33  
I DO NOT HAVE THE TRACTOR HERE. GAS IS LIKE CRAP. IF IT DOESNT ALL BURN UP- IT RUNS DOWN HILL. IF IT DOES NOT SMOKE AND RUNS GOOD AT HIGH RPM. THEN IT IS INTERNAL. MAYBE THE CHOKE IS STUCK OR 20 DIFFERENT THINGS. DONT TEAR THE MOTER APART IF YOU HAVE NOT CHECKED EVERYTHING ELSE. JUST A SUGGESTION JUST LIKE YOURS.



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Opa A

02-01-2005 16:48:17




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
I agree with all the posts, but especially with Wayne. It would take an awful lot of fuel to get that much past the rings if the spark was firing at all. Some spark plugs will never fire properly again if they have been fouled too much. Does it sound like shes hitting on all cylinders just after you clean the plug? Also check the sparkplug wire with an ohm meter if you have one and compare to the other wires, check the coil wire too. Keep us posted.

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waltertn

02-01-2005 15:19:13




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
Is there enough gas to settle out or does it just smell like gas?



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samray

02-01-2005 15:57:36




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 Re: gas in oil, plugs fouling farmall H in reply to waltertn, 02-01-2005 15:19:13  
Waltertn-seems to be about 1/2 oil and 1/2 gas.



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waltertn

02-01-2005 16:36:26




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 15:57:36  
If you have that much it probably is rings. Have you done a compression check? Poor ignition can make the oil smell like gas, but not get that much gas in the oil.



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Wayne Swenson

02-01-2005 15:18:10




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
In your pursuit of possible carburetion problems, don"t overlook the ignition system.
How long since the points were re-set & the timing checked?
Is the system able to produce a snappy-blue spark that will jump a ¼" gap?
The other suggestions are fine; just don"t forget about the spark.



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Michael Soldan

02-01-2005 14:42:36




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
Samray,It is not uncommon for fuel to build up in the oil if you have cold weather and the tractor is only used for very short periods of time. If the engine doesn't reach operating temperature, unburned fuel will get into the oil. I am more likely to think that even though you have rebuilt the carb three times that a float that sticks or rubs against the side of the bowl would be the problem. I also had a float that leaked once and it would fill up with gas and go down flooding the engine. I would be inclined to think that even worn rings and a high hour engine should still burn its fuel if the fuel is being delivered with the right amount of air, an engine like that would tend to burn oil and produce blue smoke to no end. When your tractor is running check your exhaust for black smoke and if you see black smoke you know its flooding itself with too rich a mixture. My H was acting up one day and a mechanic friend gave the carb a tap with a wrench and it smoothed right out...float problem. The only way fuel is getting into your oil is through the carburetor, through the manifold and into the cylinders, it is there that unburned fuel gets into the oil. I would change the oil if you can smell gasoline in it, give the tractor a good workout, get it good and warm and then check your oil and plugs. Black smoke should tell the tale...Good luck with it ..Mike in Exeter Ontario

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JOSSETTE

02-01-2005 14:42:20




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
TAKE THE BYPASS TUBE OFF THE TOP OF THE VALVE COVER AND SEE IF A LOT OF AIR IS COMING THROUGH. IF SO, THE RINGS ARE BAD. DO A COMPRESSION TEST AND SEE IF THEY ARE IN SPEC. IF YOU HAVE ENOUGH COMPRESSION, THE ONLY THING ELSE IS THAT THE CARB IS SET TO RICH AND YOU NEED TO TURN IN THE SCREW ON THE BOTTOM-FRONT OF THE BOWL.



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Billy25

02-01-2005 22:36:12




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 Re: gas in oil, plugs fouling farmall H in reply to JOSSETTE, 02-01-2005 14:42:20  
Why do you have to shout? We can hear you ok without it.



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Novel Idea Guy

02-01-2005 14:22:48




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 Re: gas in oil, plugs fouling farmall H in reply to samray, 02-01-2005 13:47:14  
It's more serious than a carburetor. Take a look at the setup; there's no way for fuel to get into the oil from the carburetor. It's hanging out in midair, from the intake manifold.

There is only one path for any appreciable amount of fuel to get into the oil, and that's around the pistons.

That tractor has got to be absolutely gutless. It's gotta be puffing grey smoke like it's going out of style.

In short, the engine probably needs a rebuild.

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