What causes my Craftsman tractor B&S engine RPM to vary?

ridermowing Posts: 9, Reputation: 1

New Member

Aug 30, 2011, 09:06 AM

What causes my Craftsman tractor B&S engine RPM to vary?

Hi, my Briggs & Stratton 19.5 HP engine was running OK, but now it seems to lose power then gain power when moving forward. This is without the mower deck engaged. When the engaged it seems to run smoothly. Anyone with ideas?

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