Chainsaw Repair

Hey-  Great information, thank you! The video is very helpful. I had another thought about the part numbers. I know sometimes companies will update part #'s for reasons other than that the part is actually different or changed. Sometimes it's for their internal purposes. Maybe this is the case here. Anyway it is interesting to see the evolution of this model.

It's strange that a baffle (arranged vertically) with many holes can actually not restrict flow that much but is very effective at reducing sound levels. I have a trimmer with this type of baffle and on this older model the muffler is able to be completely dissassembled for cleaning etc... I left the baffle out as an experiment and the only change in performance was the sound level was somewhat louder. I put the baffle back in since for trimming it's nicer to have less noise.

I think the biggest factor is the surface area of the outlet in relation to the overall design.