Here's a breakdown:
* 100-120 PSI: Considered a good range, indicating the engine is in decent condition and can still provide good performance.
* Below 100 PSI: Might indicate worn rings, valves, or head gasket issues. The engine may struggle to start, run rough, or lose power.
* Above 120 PSI: Potentially signifies too much compression. This is usually not a major concern unless the engine has difficulty starting or exhibits other performance issues.
Factors that can affect compression:
* Engine size and model: Different Briggs & Stratton engines have varying compression ratios and tolerances.
* Engine condition: Older engines, those with high mileage, or those that have not been properly maintained will generally have lower compression readings.
* Engine temperature: Compression readings can vary slightly depending on the engine temperature.
* Test method and equipment: Ensure you're using a reliable compression gauge and following proper testing procedures.
Important Considerations:
* Compression readings are only part of the picture. Other factors, such as engine oil level, spark plug condition, and fuel system performance, also play a role in engine health.
* Consult your engine's owner's manual for specific compression specifications.
* If you suspect low compression, consult a qualified mechanic for diagnosis and repair.
Remember, these are general guidelines, and it's best to refer to your specific engine's manual for accurate information and troubleshooting advice.
