the brand huskee is now manufactured by MTD
Parts are available from tractor supply company at www.tractorsupply.com
there are pages of not very encouraging reviews about the huskee mower or about the tractor supply company but you can contact them to see what you can get
as for the problem , if it is a zero turn unit it may be a clutch arrangement needs adjustment
If you do not get any help from that company, you could ring around the mower repairs shops to get an idea as what could be wrong as the principle of operation will be the same .
also there are sites that have pdf versions of the workshop manual for huskee