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Farmall & IHC Tractors Discussion Forum
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Farmall model H carb problem

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Peter M

02-18-2008 13:44:50




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Spark plugs are carbon fouling in a very short run time.Have installed new kit in carb but problem persists.Checked all ign parts,even changed from mag to dist system.followed service manual and checked every port,channel,metering jet and nozzel.All I can think of is a problem in the main air bleed discharging excess fuel into idle slot.I"m stumped,can anyone help ?




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riverbend

02-18-2008 14:29:09




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 Re: Farmall model H carb problem in reply to Peter M, 02-18-2008 13:44:50  
It could be that you float is sunk, your float needle is stuck or dirty, the air cleaner is plugged up, or the choke shaft has come loose from the lever. Do your idle air and main jet adjustments have any effect ? Does pulling the chole rod have any effect ?

Greg



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r4etired

02-18-2008 14:27:17




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 Re: Farmall model H carb problem in reply to Peter M, 02-18-2008 13:44:50  
Several of you will laugh when you read this but it will work, Disconnect the air inlet hose from the carb, Fill a spray bottle with cold water, Warm up the engine,run it at fast idle,spray water in the air inlet.spray as fast as you can without killing it. Do this for about 5 minutes. This will break the carbon loose,sometimes a chunk will get under a valve but it will work out.Probably you old timers have done this.

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RustyFarmall

02-18-2008 17:46:27




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 Re: Farmall model H carb problem in reply to r4etired, 02-18-2008 14:27:17  
Yep, I've heard of that. I've seen it done a couple of times. Another trick is to spray ATF into the carb throat until the engine finally quits, let it set that way for a couple of hours, and then fire it up again. It'll smoke like a house on fire for awhile, but when the smoke finally clears, that engine will be clean inside.



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old

02-18-2008 14:27:06




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 Re: Farmall model H carb problem in reply to Peter M, 02-18-2008 13:44:50  
As Andy has said and also check/clean your air cleaner it could well be plugged up and if so no carb rebuild is going to help that



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Andy Motteberg

02-18-2008 13:49:47




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 Re: Farmall model H carb problem in reply to Peter M, 02-18-2008 13:44:50  
Make sure the carburetor adjustment screws and float level are correctly set. Make sure the mag/distributor is correctly timed. You might have a lot of carbon in the engine, spray some fogging oil or something like that in the cylinders. Also make sure you are using the correct plugs and the gap is correctly set. Make sure all the valves are free and not stuck or sticking.



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