Ms201t muffler mod and carb adjustment

[lewisyounger16]

A week or so ago I put a 10mm hole in a 2013 ms201t, removed the limiter and turned the H screw counter clockwise about half a turn. I'm just concerned that's the bit I might be wrong with, I searched the Web and found that a 201t stock h screw position is 2 turns out, is that right? And a muffmod one will need to be slightly rich, so does 2 and a half turns out seem right?

 

Seems to sound okay at WOT with a bit of 4 stroking, I'm concerned it isn't tuned right, but it picks up from idle okay and revs well.

[Pete Mctree]

What colour is the spark plug ? Best indicator of how a saw is tuned. Never understood why a muffler only modded saw needs to be run rich - I set mine primarily to factory settings, then with a tacho & then check the plug, as I do with any saw