Model #917385122 CRAFTSMAN Walk Behind Lawnmower, Gas

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Why does my mower only run when I hold the primer down?


It could be that the carburetor needs to be cleaned if old gas was left in the machine for any amount of time over about 60 days. You issue could be the primer bulb itself. If it's become cracked or worn it could be letting air leak into the fuel system. I recommend checking the primer bulb to make sure there are no visible cracks or holes. If that looks good, you may want to pull the bowl off the carb and clean it with some carb cleaner. Also make sure there is no kind of visible build up on the carb.

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XX Wade_ -
Sears Technician
April 24, 2009

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