Hi Gazza and Grame,
Yes this has always been a bit of a confusing issue. I was always of the understanding that the HK30 was the 3Hp unit and the 25 the 2.5Hp variant. Most of it is in the governing set up and variants of the carburettor. It much the same scenario as the Briggs and Stratton egines which range between 2Hp and 2.5Hp. They are basically the same components but the governor is slightly different thus giving a bit more power.
Like I mentioned in my previous post, a picture tells a thousand words and sometimes we are all just surmising without the evidence in front of us.
I can't stress enough, Photos Photos Photos
Cheers,
BB.
