Lawn Mower Smoking White Smoke.

Posted in Exhaust and Mufflers
  • My mom told me to mow the lawn today so i took the lawn mower out, checked the oil and it was a little low, so i told my mom and she said there’s a bottle of oil in the car, i grabbed it, was reading it to see if its meant for lawn mowers at all, and saw “For Diesel Engines” on the front, i thought that was good enough so i unscrewed the oil cap and poured some in, i wasnt sure how much to put in cause i never did it before, i kept putting a little in at a time and putting the dipstick in and repeating that. I never really was able to see the oil level on the dipstick so i thought i over filled it. I mowed the lawn and after a while the mower was making kindof a squeaky rattly noise, i shut it off and looked at the blade, nothing was caught so i pulled the cord to start it but it failed to start then smoke started coming out of the exhaust pipe/tin. (white smoke) It smelled kindof like burning oil or rubber, something like that. I checked the oil again and i think the oil was still low.

    What happened?

    There are 4 Answers for "Lawn Mower Smoking White Smoke."

    1. Cliff says:

      diesels and gas engines NEED different oils with certain different additives.
      using the wrong one means the different fuel and its different blowby gases can destory the oil.

      deisel oils, if not marked as obvious as this bottle was, will have a C for compression ignition engines.
      gas oils will have a S for spark ignition engines.

      change the oil. get the proper oil in it. maybe it is not yet damaged….

    2. LEXUSRY says:

      SINCE YOU USE THE WRONG OIL, THERE WAS NO OIL GETTING TO THE PISTON TO LUBRICATE THE PARTS . ENGINE OIL IS TOO THICK TO FLOW FOR THE LAWN MOWER. IT REQUIRE THIN OIL TO FLOW EASY TO LUBRICATE THE ENGINE PARTS. WHITE SMOKE INDICATE WATER IS SEAPING OUT THE EXHAUST .

    3. Hank says:

      When you tipped the mower over to check the oil leaked out of the crankcase breather and onto the muffler. There is nothing to worry about and another thing diesel oil is not good for small engines. So drain the oil and replace it with SAE 30 or SAE 5w-30push mowers only take 22 oz. of oil and a quart is 32 oz. to drain the oil first clean off the bottom of the motor inside the deck right by the blade. now take a 3/8 ratchet and a 3″ extension and remove the plug to drain the oil. The plug has a square indent that fits the ratchet.

    4. randy_ishere says:

      drain the oil and put the right oil in it !!
      the white smoke is because you tipped the mower over and oil got in the muffler, after changing the oil, just run it, it will burn it out of the muffler and quit smoking, might take a few minutes