B&S 6.25 lb-ft = how many HP?

[dwendt44]

You guys are really overthinking this.

Since these small engines are governed to a certian RPM, that's what they should be rated at.
As long as everybody plays by the same rules.

These engines are that efficient(economy or horsepower wise) anyway, though they all respond to 'hop-up' changes.

 

[Craig in Canada]

The governed RPM depends on how the engine is used. Power washers won't have the same max RPM as a lawn mower. Same for generators. A blanket statement saying they are all governed to the same RPM simply isn't true.

It would also be fair to say that some OPE has to take load bog into consideration (like mowers and snow throwers) while others generally manage to maintain steady RPM (washers and generators). The former would surely benefit from a curve that doesn't show a big torque dropoff below 3k RPM (like the sample GC160 one above) showing that the engine has the umph to recover from bogging.

Curves really are the best way, but I wouldn't expect to find curves on the product tags hanging off of every piece of equipment at Home Depot. So, the public continues to be misled in many cases. Of course it's not like cars don't suffer from the same thing by only listing peak numbers combined with the general public's obsession with HP instead of torque numbers.

 

[Bill Kapaun]

This is most likely the engine. Sears lists at least 1 mower as a 6.25 "rating" & 190CC. Ergo, 5HP Quantum.
http://www.tewinc.com/pdf/122K00.pdf