http://www.kawasaki-criticalpower.com/horsepower-testing Questions and answers about Kawasaki Critical Power: Q: Why did Kawasaki go to Critical Power? A: Lawn care pros who count on our engines need accurate engine data. Critical Power is based on a tighter horsepower testing and rating method which much of the industry uses. This method better reflects Kawasakis advanced engineering and manufacturing technologies, and provides a more exact horsepower rating. Q: Have the engines changed in any way? A: No Critical Power engines are identical to previous models: same model number, same power output, same shape, size and design. Only the horsepower rating is different. Q: Why is the horsepower number different from what it was? A: Different rating methods give different results for the same engine. Our new testing and rating methods result in a new, more accurate horsepower number. The power output itself is unchanged. Q: Isnt a bigger horsepower number better? A: Not always. Its not the number that matters its the power output. Some rating standards provide bigger, less accurate numbers, and the engine may not be capable of delivering the power thats advertised. Q: Why is Kawasaki power testing verified by somebody else? A: Third-party verification helps ensure precision and consistency in horsepower testing methods and claims. Kawasaki uses a world-recognized, German-based authority, TÜV Rheinland Group, to verify horsepower testing, and results are certified by SAE International, so there is no doubt they are accurate. Q: Where can I find out more? A: Complete engine information and specifications are found at kawpower.com/engines. For details regarding SAE test standards, visit standards.sae.org. For details regarding TÜV Rheinland Group verifications, visit www.tuv.com.