Engin fogs the neiborhood with air filter on.

What is the compression ratio for my engine?

Briggs & Stratton side valve (L-Head) engines use a compression ratio of 6 to 1.Our Overhead Valve (OHV) engines use a compression ratio of 8.5 to 1.

What would cause my engine to "puff" smoke while it runs?

White/blue smoking usually indicates the burning of oil. Causes to this condition include:

• Overfilling the crankcase with oil
• Incorrect oil grade
• Operating engine at greater than a 15 degree angle
• Inoperative crankcase breather
• Crankcase air leak
• Blown head gasket
• Worn cylinder and/or rings
• Turning/Tilting the engine on its side for any reason (storage, changing oil, etc). If the engine has to be tilted, ensure the spark plug is facing upwards to help prevent oil from escaping the crankcase.

Also, be aware that any small air leak can cause an excess of air entering the crankcase and will create a higher oil mist than the breather is capable of handling. The excess oil will then return through the breather tube and back to the air filter. Engine oil capacity is dependant on your specific engine model. To determine your engine's oil capacity, please visit our Oil Capacitypage. Oil level checking and changing intervals are available on ourMaintenance Schedule page, as well as a hyperlink (text highlighted in blue) leading to oil changing procedures.
The "Oil" section of your Operator's Manual also contains this information. Other possible causes include operating or tilting the unit at an angle, an obstruction in the breather tube (located behind the air filter), damage to the cylinder/piston rings, etc.

I had possibly the same problem with my lawn tractor about a month ago... I tried removing the carburetor and cleaning it, but I always ended up pushing debris into another area and creating new problems. Eventually I just bought a new carburetor, changed the oil (some gas had gotten into my oil thanks to the problems I had with my carburetor), cleaned the spark plug, emptied the oil filter and replaced it, checked the air filter ((no oil there, phew)... and it seems to be running fine after 3 engine hours (knock on wood).

My backstory is the lawn tractor was sitting in the garage with our car for two years and not used. I prepped it for long term storage, but failed to drain the carburetor of old gas, so the old gas gummed up the works (even with fuel stabilizer). When I did get it running (after changing everything listed above) a lot of smelly white smoke kept coming out, but as I let it idle in fast speed the engine strokes became more regular and the bouts of white smoke became fewer and shorter until the smoke stopped altogether.

Hopefully this helps!

Exhaust pipe white smoke, indicating that the fuel into the cylinder did not burn, but under the influence of a certain temperature, the formation of fog and steam. The most frequent causes of white smoke in exhaust pipes are low temperature, air in oil routes or water in diesel oil. If the temperature is low, the white smoke will be eliminated when the temperature rises. Strictly speaking, it does not count as a consequence and does not need to be dealt with. If there is water in the air or diesel oil, the exhaust is characterized by the high and low speed of the diesel engine in addition to the white smoke, and the unstable operation. If white smoke is emitted from individual cylinders, it may be due to cracks in the cylinder head bottom plate or cylinder sleeve, or poor sealing of the cylinder gasket due to leakage of water into the cylinder.

WHITE smoke? Or BLUE smoke? White smoke is usually caused by burning antifreeze (possible blown head gasket). Engine oil burning causes a bluish colored smoke.

Changing the oil two months ago means absolutely nothing to me. I have customers that travel 6000 miles or more in a month. Oil consumption is measured in volume over miles, not volume over months. It is normal for most 4 cylinder engines to use a little less than 1/2 quart in 1000 miles (even more than that for 6 cylinder and 8 cylinder engines).

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.

Check Is ther any spark, Check the air filter- is it ok?

Try checking the prefilter on your air filter. I had a similer problem and mine prefilter was completly covered in dirt. I changed the air filter and it solved my problem. Also make sure the air intakes are not partially clogged with dirt or other stuff.

Check the air filter, replace.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

remove the spark plug.  And pull the cord again.  if the carb float is stuck down or you overfilled the oil you could be hydro-locking the engine.  Check.

Pull the carburetor and clean it for staters.Be sure to change oil any little bit of moisture in the crankcase will let it smoke white by seeping by the valves and piston rings.Also put a little small amount of dry gas in the gas tank to rid all of the water that may have been left in the tank. I some of this will help you.