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John Deere LT 155, why are small amounts of oil dripping into the carburetor air intake thru he oil breather hose connected to that air intake chamber

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The breather hose is the means of allowing the compression by pass gasses to not build up pressure in the sump and it exits into the air inlet system near the air cleaner
for oil to be dripping there indicates
1--excessive oil in the sump
2-- worn rings allowing excessive blow by and boiling the sump oil
3-- incorrect oil used in the sump ( too thin) try a 30w -50 grade

Posted on Dec 18, 2016

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John Deere LT 155, why is small amounts of oil dripping into the carburator air intake thru the oil breather hose connected to the intake


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It's going to need a carb kit to fix the problem. Make sure your gas cap is venting ok, because gas expands in the summer and can force gas to pass thru carburetor and flood the cylinder then passing down into the oil. Depending on the age of your mower, the carburetor may have a gas shutoff solenoid on the bottom and this may have malfunctioned. Another is a bad float or needle valve which a carburetor kit would fix. A needle kit with bowl gasket may be all it will need. Hope this will help.

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How do the crankcases gasses get into the intake air chamber of my 2002 volvo xc70 and does this or can this make the ngine rough


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1 Answer

My John Deere stx46 riding mower acts like it becomes starved for gas after using for hour or so. Fuel filter is new, gas line new, coil pack new. Ran fine last year. Filter will be emtpy when dies, then...


Try loosening the gas cap a little...... there is a normally a small breather hole in the top or underside just above the seal which allows a small amount of air to enter into the fuel tank. Sometimes this breather hole gets clogged..... stopping air from entering into the fuel tank as fuel is used. Eventualy enough vacume pressure accumulates inside he tank causing a vapor lock. If you loosen your fuel cap slightly.... this should prevent the problem your experiencing. If it does... try soaking cap in deisel fuel or heating oil overnight, remove and allow to dry prior to re-installing. If the problem persists after a good soak, only option is to replace fuel cap. GOOD LUCK!

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1 Answer

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Has the oil been changed lately? A lot of times over filling the oil will cause oil to blow back thru the carburetor, Also if the air filter got caked with mud running the box with no lid or allot of dirt in the filter. The engine will try to use the crankcase breather hose as an air intake since not enough air was coming in the conventional way, therefore sucking in oil. Has it smoked at all? Sometimes if you try to shut it off oil will run back down the intake tubes into the air box. This may be applicable to your engine that the breather is being used to **** oil into the box due to lack of fresh air intake.
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1 Answer

Carburetor


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