MY CHAMPION R434 LAWN MOWER BELCHES WHITE SMOKE?

What someone may have done is to put too much oil into the sump (I did this myself so learnt the hard way).

If you keep using the mower, the oil will burn off eventually and the exhaust will go back to normal.

Another alternative (but less likely) is that the ring around the piston may have broken which allows oil up into the chamber.

Tony Breeze
May 2012

your mower sounds like it is burning oil, I have the same type mower and after cleaning the underneath of my mower by tipping it onto its side I had the smoke problem, I have sinced kept my mower stored level and kept it level when cleaning or transporting it, and I have not had a repeat of the smoke fault. i hope this helps

keith wieczorek
June 2008