Can a 173cc engine be more powerful than a 196cc?

[StarTech]

And gross HP is different than net HP.

I remember one year here I had three identical Briggs opposed engine. (I mean the same exact model and type numbers) All came in the same day from three customers. they were labelled 18.5, 19.5, and 20.5 hp. This was just a marketing scheme that Briggs and several small engine companies got sued over. This is why many now spec ft-lb torque instead of hp.

 

[sgkent]

all they had to do to on those 3 engines to increase HP was raise the working RPM. All engines made from jet engines to ship turbines to FI racing cars to the smallest lawn mower are equal when they are turned off. They make zero HP at that RPM.

 

[fixit1ddh]

Briggs was doing that on there 14 & 16 hp horizontal cast iron engines in the 70's. Only difference was the carburetor. And of course couple more $$ for the 16 hp model.