Chainsaws

Based on the P/N of the carb (WG7) I would assume this is an EPA 3120XP? that is, if it was not put on at a later date than from the factory..

The Number on the plate is
965 96 07-00
00 1600040

I would assume that means year 2000 build and serial number of 1600040?

with that being said, the P/N on the carb is a WG-7 which is the P/N of the EPA carb on the 2000 IPL.   It lists a WG-8 as the NON EPA carb part number.

I also saw on my older 3120XP (its a 1989) it had a WG-2 (absolute garbage carb, would not run to save its life) and I upgraded it to a WG 8 or 10 (P/N: 503282001), i cant remember on that one.  The replacement carb fixed it and it runs awesome.  

But the 1989 3120xp had a P/N of 503 13 85-01 for its ignition coil and my 2000 only has one P/N listed of 503 13 85-02 for the coil.  On my old saw the -01 was truly a non EPA chainsaw because it was not even available in a EPA version. But the 2000 i just got off ebay appears to be a tree hugger EPA model with the WG7 on it.

My question is does it matter if i go to a WG8 or WG10 on this 2000 model and leave the 503 13 85-02 ignition on it?

I really do not know why they would have a "EPA" and a "NON EPA" ignition on it. Does it not run as hot to create a spark not as hot as a NON EPA one?  

I also noticed that I have seen several different HP ratings for the 3120xp. I have seen it listed as 9.2HP and as 8.4HP; both on husqvarna documentation.   Is that because the EPA is running at 8.4HP and the non runs at 9.2hp?

any insight would be greatly appreciated.