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Exhaust question TEA 2085

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Author  [Modern View]

04-05-2021 06:51:12

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I notice that the stabilizer chain behind the exhaust pipe is black and oily. The tractor runs well but i wonder if it is running to rich. Just inside the exhaust pipe is the same. Is this correct? If not which knob on the carburetor should I adjust?

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Charles in Aus.

04-06-2021 03:25:22

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 Re: Exhaust question TEA 2085 in reply to mhadavi, 04-05-2021 06:51:12  
When the engine is hot let it idle and lift the spring loaded alloy oil filler cap up and wedge it open . Increase the rpm and look for oil vapour and fumes . Too much and you may have worn or broken rings .
Are one or more of the spark plugs oily ?

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04-05-2021 11:02:56

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 Re: Exhaust question TEA 2085 in reply to mhadavi, 04-05-2021 06:51:12  
Pretty common to se that. If it uses any oil that may be what you are seeing.

Before adjusting the carb, be sure everything else it properly tuned, plugs fresh, distributor working properly, points set, valves set, air cleaner clean, (especially the wire mesh inside the canister, often overlooked), thermostat installed and working, carb clean and float level set, fuel tank clean and delivering clean, fresh fuel to the carb. Be sure the oil is fresh and not contaminated with gas, especially if it has been run rich or cold for a while.

Good information John posted. The most important is the throttle response test when setting the main jet. Let the engine warm up, then idle down to slow idle, then suddenly open the throttle, listen to the response and watch the exhaust smoke. Start leaning the mixture 1/4 turn in at a time, repeating the test until until the engine falters. Then start slowly opening the main screw, repeating the test until the engine responds crisply without hesitation. A single puff of black smoke is the goal.

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John Deere D

04-05-2021 07:24:22

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 Re: Exhaust question TEA 2085 in reply to mhadavi, 04-05-2021 06:51:12  
There are several makes of Carbs used on the TEA-20 Tractor......
Zenith 24T-2
Holley 859-A
My TEA-20 runs a ZENITH 24T-2

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