MARINER : 40C (TWIN CARB) (W/AUTO-BLEND) Model Serial Ranges 6E9-007666 THRU 6E9-015000 (M) 6E9-105014 THRU 6E9-150000 (E) 6E9-309344 THRU 350000 (ML) 6E9-423163 THRU 450000 (EL) 6E9-500101 & Up