Carburetor Rebuild Kit for ZAMA RB-104 Aftermarket Carburetor Rebuild Kit for ZAMA Replace ZAMA RB-104 Fits ZAMA C1U-K68 Fir Echo PB2100, ES2100, ES231 and PB201 models with specified ZAMA carburetors Order by 5.00 PM, ship at next day with USPS first class mail.