Why does my engine's RPM seem to fluctuate (runs rough)?
Many engine performance problems can be linked to maintenance issues such as stale fuel, dirty air filter, fouled spark plug, and deteriorated oil.
A great way to help avoid these problems would be to perform an annual tune-up using a Briggs & Stratton engine Maintenance Kit.
Engine hunting and surging at idle is usually caused by a fuel delivery, air leak, or governor system problem. Cleaning/overhauling the carburetor, adjustment of the governor, and/or changing the air filer may be required.
If you wish to perform this maintenance yourself, a good source for engine specifications and technical servicing information would be a Briggs & Stratton Repair Manual (Lookup Manual by Engine Model Series). The correct Repair Manual for your model engine is often listed in your engine's Illustrated Parts List.
Repair Manuals are available for purchase through our websites Manuals, CDs & Bookssection or locally from a Briggs & Stratton Authorized Dealer.
For your convenience, Do-It-Yourself parts and products related to this and other maintenance/repair issues such as air filters and carburetor parts may be ordered through our Maintenance Parts section.
Your Illustrated Parts List will provide component part numbers specific to your engine's Model, Type and Code that you may require.
Your best source of information regarding any engine concern would be a Briggs & Stratton Authorized Dealer. Your Briggs & Stratton Authorized Dealer has all the information relating to Briggs & Stratton warranty information, replacement engines, short blocks, parts, pricing, service/repair, specifications, etc.
Please read and abide by any applicable Safety Information contained in your engine Operator's Manual. The material provided above is not intended to replace work performed by a Briggs & Stratton Authorized Dealer. Terms and Conditions apply to all of the information presented on this website. Always be sure to completely read and understand your engine Operator's Manual.
Locate your nearest Briggs & Stratton Authorized Dealers here.
