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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


could be a valve issue or timing issue. flywheel key may be sheered a little bit causing incorrect firing.

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1 Answer

John Deere L130 riding lawn tractor will not start what do I do?


I'm assuming the motor will crank over, but not start. Remove the air intake cover & filter off the carburetor air intake. Do you smell gas? Is gas dripping out of the carburetor? If not, spray a couple shots of starting fluid or carburetor cleaner into the carburetor air intake throat. Close the choke & crank the engine. If it starts, & stalls, repeat the process. If it won't stay running, your carburetor float jet is gummed up & needs to be cleaned. Check & clean the spark plug. Does the spark plug fire when the engine is cranked? If no, then you have an ignition problem.

Mar 05, 2016 | John Deere L100 Series

1 Answer

My lt 133 john deere mower has gas in oil and back fires. runs 5 min and stops.


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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1 Answer

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


It's possible that you may have either a clogged breather box or broken breather box hose. The breather box is located under the intake manifold. It is sometimes also called an oil trap.

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1 Answer

2000 Kawasaki ZRX 1100 fuel coming from breather hose


Hi, Anonymous you're getting ready to go riding you pull out the dipstick to check your oil level and are greeted with the unmistakable smell of gasoline. What happens next depends on the following:
1. You have experienced this before and do not start the engine but do change your oil and filter leaving it 1 quart low until the engine reaches operating temperature then top off as necessary.
2. The amount of time your bike has been sitting, since the last time the engine was running.
3. The amount of gas and contaminants in the tank.
4. The oil pump location, exterior or interior.
5. The condition of your petcock gasket/seal/diaphragm.
If your gas tank was low and you start the engine probably nothing you would notice but if your gas tank was full and you start your engine the oil/gas mixture can blow into your air filter, come streaming out of your crankcase breather hose, and launch your oil tank cap followed by a blast of oil. The mess can be minor or you need to call a Hazmat team for assistance. This will also happen if you overfill your oil tank.
Next is the how and why gas can get into your oil tank/system:
a. The vacuum petcock rubber/diaphragm fails, which allows gas to flow from the fuel tank through the petcock, through the vacuum line into the intake manifold, then into the combustion chamber, where it seeps past the piston rings and into the bottom end.
3. Non-vacuum petcocks that are not turned to the off position will patiently wait until contaminants from the gas tank build up in between the carburetor needle and seat breaking the seal thus inviting gas to enter the combustion chamber eventually finding it's way into the bottom end and the oil tank.
4. Bottom line if you're not going to ride your bike for a while turn off the petcock.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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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!

May 14, 2011 | John Deere Pto Clutch For Stx38 And Stx46...

1 Answer

Oil in the air filter ,RANGER 500 2X4/4X4


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.
The other possibilities would be crank case pressure pushing the oil in (piston ring blow by), but that should (theoretically) result in low compression (since the cylinder pressure is getting to the crankcase instead of staying in the cylinder), the oil is overfull and being pushed out since air will compress but liquid will not, or poor crank case ventilation system design (but if that were the case likely there would be a recall as that would directly effect emissions which is federally regulated).

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1 Answer

Need wiring diagram for lt155 john deere riding mower


need wiring diagram for john deere lt 155

Aug 26, 2010 | John Deere Garden

1 Answer

Carburetor


It is located between the Intake Manifold on the engine and the Air Breather, which is under the seat. To remove, turn the fuel shutoff valve to OFF. Remove the fuel supply hose from the carb; it may help to leave it in place on the shutoff valve. Loosen the hose clamps that connect the carb to the Air Breather and the Intake Manifold. On the right side of the bike, you will have to remove the cover and cables for the throttle control. The cover should be held on by two small screws. The cables will come out of their grooves, but you may have to work at that a bit.

Nov 10, 2008 | 2000 Honda CA 125 Rebel

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