PRIMER compatible with Walbro carburettor 2-stroke engines brushcutter, blower, chainsaw, hedge trimmer models: HDA-51, WA-180, WA-181, WA-185 WA-187, WA-194, WT-50, WT-139 WT-145, WT-184, WT-243 Original part no.: 40271047 Original part no. 188-509 MP