thanks to Chris-PA for inspiring this. the idea of using a video or audio file to examine and evaluate performance of a 2stroke engine fired me up. yes, i have a wireless tach that i use in the shop, but its hard to quantify performance of a saw in the field. what rpm does it turn in the cut? this is close to being the under $100 chainsaw dyno.
here's my youtube vid:
here's my youtube vid: