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Garden Tractors Discussion Forum

kohler aqs341 motor

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gfj

02-05-2019 11:36:57




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What is the cause of oil in the air cleaner. Filter is new.




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Bob

02-08-2019 10:17:27




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 Re: kohler aqs341 motor in reply to gfj, 02-05-2019 11:36:57  
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Another try with the link to the manual...

http://resources.kohler.com/power/kohler/enginesUS/pdf/tp_2379.pdf



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gfj

02-05-2019 20:01:50




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 Re: kohler aqs341 motor in reply to gfj, 02-05-2019 11:36:57  
I got this jd lawn tractor because it had a tiller and hydrolic lift. It was not running but after cleaning the carb it started and ran. I did check and clean the valve vent. Going by the amount of blue smoke I think it needs new rings. I will check all of your ideas. Thanks for your help.



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Bob

02-05-2019 19:44:47




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 Re: kohler aqs341 motor in reply to gfj, 02-05-2019 11:36:57  
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You can download the factory service manual for FREE (in .pdf format) at the link below.

Once you've downloaded it, look at .pdf pages 22 and 23, "Crankcase vacuum" with diagnosis chart, and at pages 133 and 134.



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t.r.k.

02-05-2019 18:32:53




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 Re: kohler aqs341 motor in reply to gfj, 02-05-2019 11:36:57  
Another thing the other guys didn't mention. Is there any gasoline in the oil?. That is what I see putting oil in the breather of the newer engines. And its caused by either a leaky carburetor needle valve or a leak at the fuel pump if there is one on the engine.

What viscosity is the oil you are running? These were built when 30 wt. was king and they don't really like the lighter oils.



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kencombs

02-05-2019 18:12:38




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 Re: kohler aqs341 motor in reply to gfj, 02-05-2019 11:36:57  
As Sarge mentioned, check the crankcase vent valve. Often find them installed incorrectly or broken/clogged. If that's not it, check the dipstick tube, if it doesn't seal well the crankcase will become pressurized and it should be a vacuum. If the tube seems ok, I'd recommend doing a crankcase vacuum test. Hard to do a compression test with the compression release on the K series.



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oldsarge

02-05-2019 11:42:03




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 Re: kohler aqs341 motor in reply to gfj, 02-05-2019 11:36:57  
Clean/replace crankcase vent on the valve adjust chamber,then check valve guides and/or ring wear.



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