PRIMER PUMPBULB ONLY , Fits most small engine carburetors that require a fuel primer push / pump bulb. Walbro Part #'s: 188-12-1, 188-12 & 188-14-1Replaces:ECHO 12318140630HOMELITE UP-04802HOMELITE UP04802HOMELITE 01201MCCULLOCH 225834-00SHINDAIWA 20036-81670STIHL 4133 121 2700WALBRO 188-12WALBRO 188-12-1Fits Models: WALBRO WA, WT, WY, WYJ, WYK, WYL, WYP and WZ carburetors that require a 3/4" OD x 9/16" HT primer bulb Has several applications with manycarburetors from Walbro to Zama (see size spec.below)SIZE: Outside diam. atbottom lip is 18mm. Bottom inside diam. is 14mm. Height (thickness)of lip is 2mm. Bulb (pump bubble)outside diam. is 15mm.Total height (including bottom lip) is 13mm.--- OD: 0.755", Height: 0.560"Replaces manyWalbro and Zama carburetors that use the samepump bulbwith differentpart numbers. Primer bulb used onmany different brands of 2-cycle equipmentsuch asString Trimmers, Blowers, Chain Saws, Hedge Clippers and more. Some brands this will fit: Echo, Poulan Weedeater, Ryobi, Ryan, IDC, Homelite, Lawnboy, Toro, McCulloch, Shindaiwa and Stihl, New Echo, Walbro Primer Bulb This primer bulb is the same as the followingmanufacturer part numbers.plus many other manufacturers including Zama:Fits Walbro carburetors WA, WT, WY, WAT, WYJ, WTK, WYL, WYP & WZ12318140630 & 12318109560 (Echo), 01201 & UP04802 (Homelite),22583400 (McCulloch), 2003681670 (Shindaiwa), 4133 121 2700 (Stihl)Replaces the following prior Husqvarna part numbers:502183101 PRIMER/PUMP503583701 PUMP PRIMER531002994 PRIMER PUMP ASSY .For the following seriesHusqvarna series trimmers:· 120 L (1993-02)-->Carburetor Parts · 120 LC (1993-02)-->Carburetor Parts · 120 R (1993-02)-->Carburetor Parts · 123 HD 60 (2006-03)-->Carburetor Parts · 123 HD 60 (2007-02)-->Carburetor Parts (Walbro WYL) · 123 HD 65x (2007-02)-->Carburetor Parts (Walbro WYL) · 125 E (1993-04)-->Carburetor Parts · 125 L (1991-11)-->Carburetor Parts · 125 L (1992-01)-->Carburetor Parts · 125 L (1993-04)-->Carburetor Parts · 125 LD (1991-11)-->Carburetor Parts · 125 LD (1992-01)-->Carburetor Parts · 125 LD (1993-04)-->Carburetor Parts · 125 R (1991-11)-->Carburetor Parts · 125 R (1992-01)-->Carburetor Parts · 125 R (1993-04)-->Carburetor Parts · 125 RB (1991-11)-->Carburetor Parts · 125 RB (1993-01)-->Carburetor Parts · 125 RD (1991-11)-->Carburetor Parts · 125 RD (1992-01)-->Carburetor Parts · 125 RD (1993-04)-->Carburetor Parts · 132 L (1991-11)-->Carburetor Parts · 132 L (1992-01)-->Carburetor Parts · 132 L (1993-04)-->Carburetor Parts · 132 LD (1991-11)-->Carburetor Parts · 132 LD (1992-01)-->Carburetor Parts · 132 LD (1993-04)-->Carburetor Parts · 132 R (1991-11)-->Carburetor Parts · 132 R (1992-01)-->Carburetor Parts · 132 R (1993-04)-->Carburetor Parts · 132 R (1999-10)-->Carburetor Parts · 132 RB (1991-11)-->Carburetor Parts · 132 RB (1993-01)-->Carburetor Parts · 132 RD (1991-11)-->Carburetor Parts · 132 RD (1992-01)-->Carburetor Parts · 132 RD (1993-04)-->Carburetor Parts · 142 R (2000-05)-->Carburetor · 22 LD (1989-10)-->Carburetor Parts · 22 R (1988-01)-->Carburetor Parts · 22 R (1989-10)-->Carburetor Parts · 22 RL (1988-01)-->Carburetor Parts · 22 RL (1989-10)-->Carburetor Parts · 25 BL (1989-10)-->Carburetor Parts · 25 BT (1989-10)-->Carburetor Parts · 25 R (1988-01)-->Carburetor Parts · 25 R (1989-10)-->Carburetor Parts · 25 RD (1989-10)-->Carburetor Parts · 25 RL (1988-01)-->Carburetor Parts · 25 RL (1989-10)-->Carburetor Parts · 25 H (1993-01)-->Carburetor Parts · 26 H (1993-01)-->Carburetor Parts · 26 H (1994-03)-->Carburetor Parts · 26 H (1995-01)-->Carburetor