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Harry Ferguson Tractors Discussion Forum
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Exhaust red like cherry! -

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Got ideas?

09-27-2003 17:28:08




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Today I managed to get this TEA2085 going that hasn't been running for a while, like maybe a year and a half. The guy I bought it from had broken the timing chain, taken it all apart, and given up. I had it sputtering quite a few times when today it struck me I was dealing with old stale gas, so I put in some fresh stuff and got it running not too badly.
Now it really overheats. This afternoon I flushed out the rad and the block (needed it), checked the thermostat (OK), and put it back together. It helped but really it just took longer before it overheated again. I figured: it's either timing too advanced, or running too lean. I backed the timing off until it was running badly and advanced it just a bit from there. I also have the air screw turned just about all the way in on the (Zenith 24T2) carb, and the bottom mixture screw is out at about 2 1/2 turns.
One thing that is not together though is the air filter to carb air pipe (missing). Is it possible it's running way lean because of this i.e. does the air filter actually quite limit the air intake so that it runs a lot richer?
I got it running again just as it was getting dark, and went to get some tools. When I came back over to the tractor the exhaust manifold, downpipe, and muffler were glowing bright red...so I'm thinking it is not a cooling system issue. In fact after seeing that I am quite impressed with the cooling system, which was only then beginning to boil over.
Am I missing something?
Jim W

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TO24424

09-29-2003 13:26:27




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 Re: Exhaust red like cherry! - in reply to Got ideas?, 09-27-2003 17:28:08  
Extreemly rich mixture of fuel, or really out of ignition time.



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Jerry/MT...another though

09-28-2003 07:56:01




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 Re: Exhaust red like cherry! - in reply to Got ideas?, 09-27-2003 17:28:08  
Since your timing chain was fiddled with make sure that the valve timing is correct! If it's not, it'll run like a three legged dog or not at all and you'll have a lot of problems. Do you have a manual so you'll know how to check valve timing and how to get it right if its not righr?



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Jim W

09-28-2003 10:06:45




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 Re: Re: Exhaust red like cherry! - in reply to Jerry/MT...another though, 09-28-2003 07:56:01  
I am pretty sure the timing chain is right. I took great care to set it up and have done it before on another engine like this one so am familiar with it.
Also, the tractor runs surprisingly well. Before I noticed the problem I took it for a drive around the yard and it was doing OK.
Good thought though - keep 'em coming!
Thanks,
Jim W



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Jerry/MT

09-28-2003 12:23:43




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 Re: Re: Re: Exhaust red like cherry! - in reply to Jim W, 09-28-2003 10:06:45  
Jim, Thanks for the follow ups. Let us know what you find when you finally get it sorted out.

Regards, Jerry



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Jerry/MT

09-27-2003 20:54:45




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 Re: Exhaust red like cherry! - in reply to Got ideas?, 09-27-2003 17:28:08  
I'm not familiar with this model of tractor but I'll take a shot. Make sure that you don't have a leak in the intake manifold and that your carb-to-intake manifold gasket isn't leaking. You really ought to set the timing with a timing light or via a static timing method. You may have the timing too retarded and so you're igniting the mixture late in the stroke and then your exhaust valve is opening causing the manifold to glow. Running without an air cleaner should have no effect on this problem. Make sure that you get this corected or you'll burn your exhaust valves.

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Jim W

09-28-2003 10:10:41




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 Re: Re: Exhaust red like cherry! - in reply to Jerry/MT, 09-27-2003 20:54:45  
I woke up this morning and thought - intake gasket!
I will be checking this next.
There is no mark on the crank pulley on this model so can only set it static. I think I did that (but it has been quite a while, memory foggy) but anyway now after all this fooling around who knows where it is.
I will do all corective action I can think of before even re-starting it; I certainly don't want to do in the valves.
Thanks,
Jim

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ErnieD

09-29-2003 16:30:32




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 Re: Re: Re: Exhaust red like cherry! - in reply to Jim W, 09-28-2003 10:10:41  
Your timing marks are on the flywheel, look for a port hole, with or with out a cover on the side. You have an updraft carb, no air bleeds. Too lean will overheat, not rich.

We had a to 30 belted on a blower, putting corn chop into the silo. On the governer wide open the exhaust manifold would glow a dim red.



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Ray,IN

09-27-2003 18:01:17




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 Re: Exhaust red like cherry! - in reply to Got ideas?, 09-27-2003 17:28:08  
You discovered the culprit. The air intake pipe and hose and breather all must be connected properly to obtain the proper air/fuel ratio. The valves are running hotter than the manifold and exhaust pipe by approx. 300 deg. This will destroy the top end if not corrected. H. Ferguson tractors use the fuel mixture to aid in engine cooling for the top end and thus must be adjusted to run properly when under heavy load. This causes an overrich mixture at idle and lightly loaded; black smoke from the exhaust then is normal.

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Jim W

09-28-2003 10:13:54




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 Re: Re: Exhaust red like cherry! - in reply to Ray,IN, 09-27-2003 18:01:17  
Thanks Ray, I will get the air filter rigged up for sure before proceeding.
Normally I think of air filters as being designed to have an absolute minimum of restriction, but I am normally playing with cars.
I will report back what I discover.
Regards,
Jim



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