HIPA RB-48 Carburetor Rebuild Kit with Primer Bulb for McCulloch 2816 2818 3227 C1U-M29D Parts Replacement manufacturer part number: RB-48 Compatible ZAMA C1U-FD1 C1U-K28A C1U-K36 C1U-M37A C1U-M29A C1U-M29B C1U-M29C C1U-M29D C1U-M29E