Lawn Mower Engines Seem So Picky
 

they require maintenance ... if you mow in dust,you can
clog the air filter in one or 2 mowings... and not treating the gas with
fuel stabilizer causes most carb problems during storage,even though you
ran it out of gas,there is still some left in there. if your not willing
to get a manual and read it , let someone who knows about engines get it
going and mantenance it for you. lucas

http://www.minibite.com/america/malone.htm