Model Fit Guide
ST:
021, 025, 025C, 70, MS 230, MS 230 C, MS 230 C-BE, MS 241 C-M, MS 250, MS 250 C, MS 250 C-BE, MS 251, MS 251 C, MS 251 C-BE
Replacement OEM Part: OREGON: L62, ST: 26RM3 62, 3639 005 0062, 3689 005 0062, HUS: H28-62

ST:
021, 025, 025C, 70, MS 230, MS 230 C, MS 230 C-BE, MS 241 C-M, MS 250, MS 250 C, MS 250 C-BE, MS 251, MS 251 C, MS 251 C-BE
Replacement OEM Part: OREGON: L62, ST: 26RM3 62, 3639 005 0062, 3689 005 0062, HUS: H28-62
The issue may be caused by an incorrect fuel mixture, spark plug problems, or a clogged carburetor.