Rotary 10394. WALBRO #188-509 PRIMER BULB ASSY. FITS WA 135/148A,150/154 CARBURETOR.

Tanaka 442-25015-801

Walbro 188-509 primer bulb assembly that is OEM part number Red Max 12708261 and 516270901, and Tanaka 442-25016-801. This bulb is used on Tanaka ECS-290 chainsaws, and TBL500 blowers and Red Max HB260. This is used with the following Walbro carburetor models: HDA-51, WA-180, WA-181, WA-185, WA-187, WA-194, WT-50, WT-138, WT-145, WT-184, and WT-243