WHY DOES MY ENGINE'S RPM SEEM TO FLUCTUATE (RUNS ROUH)?
- This FAQ article applies to all Vanguard engines with a carburetor -
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 filter may be required.
If you wish to perform this maintenance yourself, a good source for engine specifications and technical servicing information would be a Vanguard Repair Manual.
The correct Repair Manual for your model engine is often listed in your engine's Illustrated Parts List.
Repair Manuals are available for purchase from a Vanguard authorized dealer.
Your Illustrated Parts List will also provide component part numbers specific to your engine's Model, Type, and Code that you may require.
FURTHER MAINTAINANCE TIPS
GET SUPPORT
Take advantage of the expertise your local dealer can provide for service and support on your Vanguard engine.
MANUALS & IPLS
Download the operator's manual for your Vanguard engine or equipment by following our step-by-step process.
