What would be wrong ?

Don't you just love these people on here who try to answer, Glad I don't hand over my cash to these cowboys.

White smoke means burning oil. Have you recently filled or topped up the engine with oil- if so, it may be possible you have over filled it?

Sewcondly- have to put the mower on its side to maybe clean it?

pleasant
August 2013

sounds like its burning oil to me check oil level
could be a stuck valve hard to say get it looked at some places do offer free assesment i do

daz
August 2013

Hi. Hopefully you have not run it low with oil. Try removing the air filter and start it up it could be covered in oil. If this helps replace filter.

Michael
August 2013