NIMTEK New Carburetor Carb RB-K75 Carburetor with Primer Bulb for ECHO A021000740 A021000741 A021000742 Shindaiwa DH212 Hedge Trimmer NIMTEK Quality Aftermarket Replacement Part Replaces Part Numbers Echo A02100740 Zama carburetor replaces ECHO A02100740 FITS MODEL SRM 230 STRING TRIMMERs Replaces ZAMA RB-K75 ECHO A02100740 FITS MODEL SRM 230 STRING TRIMMER Match original equipment exactly for a perfect fit, easy to install.