261 power ratings
I have found power ratings for the 261 ranging from 2.9 kW to 4.2 bhp (3.1 kW) when I looked into it.
I thought there should be no good reason for various ratings, as the saws were made for a very short period of time.
However, looking into IPL's there were in fact two versions;
-one IPL from 1998 says "261 EPA - USA ONLY" and one from 1999 that just say "261 EPA".
The only difference I found was that the "USA ONLY" version had Walbro HDA-144A carb, and the other one Walbro HDA-144. The engine and muffler part numbers were the same.
Is it possible that this difference alone can account for .2 kW difference in power output?
Do the 144A have smaller venturi than the 144? If that is the case I tend to believe in the power difference.