Just got a stihl 390 and 025 in to work on. Both might be getting a 30 min caveman muffler mod that sure beats the heck out of paying a $100 to a ebay seller.
I am going to test how they came in. Then after carb adjustments and tune if needed and then test again after muffler mod on the ms390. Going to see if a 025 would need any muffler opening or not.The 390 the guy says is a PITA to start and by 3rd pull rips the handle out of his hand on kick back.
What is your take on that? I have ideas.
Oh and he said not to sharpen the chains that he does that himself. So when I get time next week I sure up it cuts to start off. Looks to have a 24" 25" stihl bar on it under the scabbard.
So what percentage do you think the 390 will gain in 1 cut time with same chain after muffler mod and carb adjustments? Compared to just carb adjustment and no muffler mod.
Not going to go by the way I will test when it just came in. Might run iffy who knows right now.
If his chain wont cut for chit I will put my chain on for testing.
I know what I got out of a MS290 with muffler mod and carb adjustments. I was really surprised by that one.