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Puchased a rover quick start 6 months ago. No revs

Mowing dusty dry area. black smoke from air filter. Could the dust be clogging the carby???Using unleaded as specified

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  • afinchum May 24, 2009

    straton engine. It starts up fine but it seems to barely run above idle. When the gas tank is about empty then the engine seems to run better.



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Black smoke should not be coming from your air filter. If however, the smoke is coming from your exhaust this could be the result of dirt clogging your air filter and starving the engine of air, hence causing the motor to run on a rich fuel/air mix. If this is the case clean or replace the air filter element, and keep it clean. Another reason for black smoke blowing out is dirty oil in the crank case, if the oil is very dark brown to black in color or smells burnt then it needs replacing.

Posted on Nov 13, 2008


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My mower is only 1 month old and now it is starting to putt a little like it wants to cut off. its stalling a little. sounds like it could be the filter or something, i really could use some help with this...

It sounds as if you have bad/old fuel. And if the fuel is fresh, than you may have water in the tank. If you have been mowing in an area that is very dusty, the air filter may be clogged or there may be dirt in the carburetor. It's gonna have to be a process of elimination.

Good Luck!


Jul 27, 2011 | Garden


Save your self some starting trouble.

Aside from changing the oil in your lawn mower, to prevent hard starts and possible complications in the future, regularly check the air filter.

Its an often over looked wearable part that can cause a bit of aggravation when starting, and possible rough running.

You want to make sure that it is not clogged with debris and not extremely dirty. You can have a fairly new filter or machine, but if its dusty, or dry where you mow, it can clog up fast.

When your air filter becomes clogged, it inadvertently chokes the engine causing it to pull too much gas into the engine which leads to flooding of the engine, and the engine not running as well or as efficiently.

In most cases the dirt can be cleaned out if the filter is not really old, and not intensely soiled.

So if your mower seems to be harder to start and it is recent, check the filter. You may be surprised.

on Dec 01, 2009 | Garden

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Mowing a dry dusty yard- mower running very slowly- some dark smoke also- air filter clogged? thanks

Sounds like you have restricted the air from going into your carburator to the point the mower is just running. Change the filter and if is that dusty you to may want to put on a mask. Be careful. GOOD LUCK.

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1991 toyota camry 4 yl auto 357,000 k's ASM2525 test HCppm limit 66 ppm reading 68 ppm any ideas on quick inexpensive fix Thanks Peter

Wow the kms are getting up there!
Make sure that the spark plugs are not worn and the gaps are correct.
Check the air filter for dust and clogged up with oil etc.Only clean with compressed air,blowing in reverse to dislodge the dust.If too dusty or is an oily dirt,replace the air filter.
Has the oil has been replaced in the last 10,000km.If not change it.
Put a quality fuel cleaner in the fuel tank prior to filling up.
Check that the thermostat runs the engine in the correct area on the temp gauge.too cold will cause the injectors to supply a richer mix.
Clean the PCV(positive crankcase ventilator)valve.
Perhaps clean the air mass?flow meter with a cleaner like CRC sensor or MAF cleaner.(it is the unit near the air cleaner housing that has a multiwire plug on it)If not there,clean the throttle body with a good carby cleaner.
Some worn engines put out a better test when warm,not cold or too long running.
Don't leave it idling for a long time while in test queue,shut it down and wait your turn.
I hope this helps you pass.

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1 Answer

After a dusty ride carby always has dirt in bowl

Go to lowes, look for a caulk line, there you will find a refill for the caulk line dust.

I would lightly spray the blue caulk dust around the intake and carb area, while holding at say 1/8 throttle.

If it is dust getting into the bowl from the air, you should see this in the bowl, and in the air box or tube
you should see trails if it is actually penetrating from
anywhere around the intake area.

I would think its coming from the gas. Maybe there is a defect in the carb allowing a siphon so when the air goes over the port it actually down drafts into the bowl.

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Motor runs erratically

Try cleaning the air filter and the fuel filter. Sawmills are dusty places and timber dust can clog-up air filters. Air filters in chainsaws are cleaned hourly for max efficiency.

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Oil leaking from air filter area of push mower and mower smoking

You have overfilled the oil tank. White smoke is only a hassle, not a serious problem. You have to empty some of the oil and change the gas. Clean the air filter if it is the spongy type with Dawn Dishwashing Liquid, rinsing and drying it well before reinstalling. The white smoke will stop soon as it is still in the gas that is in the carb. If the case is that you haven't filled it with oil prior to this smoke then you must be mowing on a hillside and the gas tank was on the lower side allowing oil to leak into the gas. Same solution.

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Brand new Craftsman 19.5 HP Riding Mower Sputtering(Manual Trans)

The hose you reconnected was probably for the air to the air filter. Check to see if while the hose was disconnected it pulled grass or dust into the air filter. Check the air filter, try running the mower without the filter. If it runs then replace or blow out the air filter. Hope this helps.

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Problem with my land rover discovery

its about air filter ,

open your filter air & oil both than clean your air filter than try to change your engine or transmision oils also,

black smoke indicates that your engine can't get more fresh air for serial or parellel combustions,

its easy to solve.

try itwith risk is there


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