18" bar

First-timer on this forum. Greetings... New low-end 42 cc chainsaw (brand probably doesn't matter). 18 inch bar, two retaining bolts. I've notice that if the bolts loosened (say, to adjust chain tension, or after changing chain) there is a certain amount of vertical play in the bar (maybe 0.35...

Hi guys First time on the forum. Glad it’s here. I had an 18” Echo cs-440 with an Oregon bar (and Oregon chains) but it seized after 15 years. I’m shocked it lasted that long. I replaced it with an 18” Stihl ms261. I’m wondering if I can use the old chains on the new saw. The number on the...