The model number is on the rear of the deck between the handles. It's probably something like 229630X8B. You can try 800-646-8442 for Murray (Scotts) info. My parts searches so far have yielded "no longer available." Good site for parts searching: www.outdoordistributors.com
Bill C.
June 2009
Model 229630x8
Saad Mian
May 2009
If you're quoting a SKU code it sounds like it's a FOCUS machine, throw it away and buy a new one