10x15x4 mm black rubber seal ball bearings. A step above blue-seal bearings, black-seal bearings offer an even tighter seal for ultimate protection and less maintenance in dirty environments.

Replacement primer bulb for Walbro carburetors. Fits WA-167, WT-603, WT-643, WT-644, WT-668, WT-990, WT-1107, WT-813, WYK-33, WYK-58, etc – basically, all the Walbro carbs we stock except for the HDA-223, which uses a larger bulb.
Zenoah part # 1751-81510
FG part # 07373
Walbro Part # 188-12