CARBURETOR part # 640300 632738 640096. Commonly Used on Models: HSK850-8310D HSK850-8310E HSK870-8701A HSK870-8701B HSK870-8701C 640300 TH139SA-8310F TH139SA-8310G TH139SP-8701D TH139SP-8704D . Easy to install, But it's better to be installed by professionals(NO instructions included).
