Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc  650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower Logo
Bob Swain Posted on Jun 09, 2012

Oil in cylinder of lawn mower white smoke runs poorly happened after blade was changed

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  • Posted on Jun 09, 2012
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The engine has been tipped the wrong way oil now in chamber and will burn off eventually

5 Related Answers

hunter19_46m

Curtis Sewell

  • 7482 Answers
  • Posted on May 31, 2011

SOURCE: My Troy Built Self propelled

Hi smithjazzy8...
Check your oil level, it sounds like it has got too much oil in the crankcase.
The oil level should be to the last two threads on the fill plug threads of the engine.
This is the main cause of white smoke coming from the exaust of the engine.
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hunter19_46m

Curtis Sewell

  • 7482 Answers
  • Posted on Jun 19, 2011

SOURCE: lawn mower runs rough.got fresh gas,new spark

Hi fcruz775

Sounds like you have dirt/debris in your carburetor jets,fuel passages or a diaphgram that is becoming non-flexible.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Also check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one.
When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor.
Also make sure you are using fresh fuel...and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.
If the mower/weedeater is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.
I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their orginal position before you started.
Once you have your carburetor rebuilt that should solve your problem.
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Anonymous

  • 389 Answers
  • Posted on Sep 19, 2009

SOURCE: white smoke and oil spewing out of troy built

Check your oil level. If it is way over full, smell it to see if it smells like gasoline. If it does, you have a carburetor leaking gas into the engine crankcase. If you recently had the mower over on its side for blade changing or inspection, you have gotten oil up on top of the piston and it should burn off in a few minutes of running. Check your air filter to see if it is soaked with oil, replace it if it is.

Anonymous

  • 332 Answers
  • Posted on Apr 04, 2010

SOURCE: oil change

STOP !

Your lawn mower is has a 4 cycle engine
It does not require oil to be mixed with the gas
The oil for the crankcase should be a 10W-30 or 10W- 40
NO GAS IN THE OIL
What you have is a 2 cycle oil that is mixed with gas for most weed eaters, chain saws, ect
Putting a gas/oil mix in your mower WILL severely damage it destroying the main bearings and could lead to an explosion or fire.
Please be careful

Anonymous

  • 389 Answers
  • Posted on Sep 19, 2009

SOURCE: changing blades on lawn mower

Very first thing to do - - UNPLUG THE SPARK PLUG
Lean the mower backward on the handlebar (take off the bag if it has one) and hold it down with something heavy like a cement block, bucket of water, anything that will keep it from tipping back up on you. Get a small block of wood like a 2x4, or similar to block the blade from turning. Find a socket that fits the bolt or nut holding the blade. A socket is best as they can be quite tight and a wrench is likely to slip and ruin the shoulders on the fastener. Using a long handled ratchet or breaker bar, turn the fastener to the left (counter-clockwise) and unscrew it all the way. Install the new blade, with the beveled side of the cutting edge UP toward the bottom of the engine, in the opposite sequence that you took it off making sure that it is lined up centered. Tighten the fastener approximately 60 foot pounds again using the wood block to prevent it from turning

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Why does it blow white smoke (when running)?

First check the oil level. If it is too high oil will push past the rings causing the white smoke. If the oil has not been changed for too long the oil has thinned out and should be changed.Do not use motor oil that does not contain lead. It is normally sold as lawn mower oil. It is 30 weight nondetergent oil and contains lead to properly lubricate the engine If the oil level is proper it is time to have the motor cylinder honed and a larger piston and rings fitted. this can be expensive. It could be cheaper to replace the mower
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Check the Oil level. If gas got past the needle valve ( which happens more and more with this Ethanol gas ruining Rubber carburetor parts) Then gas will run down the cylinder walls and into the crankcase. Gas will mix with the oil and overfill the crankcase that will cause the mower to smoke like crazy.
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Have a toroZ5035 mower 90 turn) with kawasaki engine. **** smoke appears on start up, but goes away when warmed up. choke must be kept on at least halfway or motor dies. changed plugs and cleaned air...

**** smoke sounds bad, If what you meant was white smoke then I know what is going on with the mower. The white smoke is from the extra oil in the cylinder head. There are tow causes for this. #1 the engine rings are worn and will not prevent the oil from running into the combustion chamber as the engine sits. #2 the carburetor is leaking fuel into the oil and thinning it out. This thin oil bypasses the rings easier and drives the oil level up too. I would recommend a carburetor rebuild. You can get parts from a local dealer like www.arcolawn,com Good luck barterjoe_64.png
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I have a Toro Super Recycler GTS 6.5 HP. Upon starting the mower white smoke comes out of the exhaust (silver housing) on the front. The smoke stops after about 2 minutes of running. Any ideas??

Oil level too high? *(check oil level with dipstick fully screwed down!)

or

Leaking valve guide *(rare.)

Cylinder walls not sealing well and oil leaking past rings. *(less rare...nothing you really can do about....just getting used up)

I would change the oil and be very careful to fill only within the full range.
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Brand new weed eater lawn mower blowing white smoke.

Pull air filter see if theres any oil in it,make sure the oil isnt overfilled. Push mowers usually smoke like that if theyre overfilled,or tipped on thier side,if there is oil in filter simply take filter off,drain oil to correct level,and run it till smoke goes away. If none of this is the problem rings are probably shot. Weedeater is a cheap brand and theyre made cheap too,not made to last.
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White smoke and blade won't engage

Sounds like a low compression problem. The piston rings have most likely failed and oil is seeping past them and burning, thus the white smoke. An engine needs three things to run...Spark, Compression, and Fuel. Just take the mower back as it is still probably under warranty. Mike. Rate 100% please.
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