I've read the same thing about Kawasaki's having more torque. I'm looking at Tom's chart and reading about SAE standards. It's a little confusing. Apparently manufacturers can voluntarily use various standards but they can't quote any SAE standard unless they actually used it.
The chart that Tom sent has J1995 at the top. That standard was first issued in 1990 and updated in 1995. It applies to both road and off road motors.
The fact that it calculates the Kawasaki at a max torque at about 47 @ 3600 RPM is only interesting in relation to the Kohler's reported max torque at 42 and assumes that Kohler is using the same J1995 standard. I can't imagine actually running the engine at 3600 RPM for very long. The difference in the standards at least provides a plausable explanation for why several mechanics have written that the Kawasaki actually has more torque than the Kohler.
It is important that at this point I state that I am neither a mechanic or an engineer, I just like analyzing things in detail. My wife would laugh that I am writing about motors. She has the engineering mind in the family both by profession and inclination. :laughing:
These are small engine dyno charts. They must have new machines to measure them. Sometimes companies take awhile to swap over to the latest technology.
Trust me , you have a nice machine there. Way more power than you'll ever need. Just keep a clean air filter and clean oil. ENJOY IT !!