* Many Engine Variations: Briggs & Stratton makes a *wide* range of engines, all labeled as "18.5." The "18.5" refers to the cubic inch displacement, not a specific model.
* Compression Varies: Even within the same displacement category, different models and engine revisions will have varying compression ratios. This depends on factors like:
* Engine design: Overhead valve (OHV), cast iron sleeve, etc.
* Intended application: Lawn mowers, generators, pressure washers, etc., have different requirements.
* Fuel type: Gasoline, propane, etc.
How to Find Compression Ratio:
1. Locate the Engine Model Number: This is typically found on a metal tag attached to the engine.
2. Use Briggs & Stratton's Website or Manual: Go to their website or use your model number to find the specific engine manual. The manual will usually list the compression ratio.
3. Contact Briggs & Stratton Customer Service: If you can't find the information yourself, contact them directly.
Let me know if you have the engine model number; I can help you find the compression ratio.
