For replacement air filter use tv #193-254 For replacement blade use tv #193-252 - SKU: TRVAL84870 439cc single-cylinder OHV Troy-Bilt engine with autochoke 7-speed Shift-on-the-Go transmission for easy speed adjustment 42 in. twin blade cutting deck for lawns up to 2 acres ...
eReplacementParts.com : How to Replace the Drive Belt on a Troy-Bilt TB280ES Lawn Mower Repair Center