Stihl MS 390 carnage - disassembly.

[MacAttack]

I do know that for the best performance a 2 cycle engine should have some back pressure. So if a muffler mod gets too extreme it makes sense that you can actually lose performance.

I may eventually end up tracking down a stock muffler for this saw once I get it running.

 

[MacAttack]

Ready for a test run, which will have to wait until this weekend. I still wonder if this saw began life as an MS 310 or a 390.....but it's a 390 now.