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  1. Liked this: Outdoors My CRAFTSMAN Rotary Lawn Mower 550 series Briggs & Stratton Engine Mod. # 917.384420 wont't start.

    Hi boomer57tux, The breather hole is what you are refering to and what Fred has stated is correct. The bowl if fill and the pressure you apply is pushing the fuel out through the breather hole. The…