Rx7man
Cattle Rubbing Post
Jennings et al were saying about 1.5-2mm BTDC, going more didn't really give much more results... on a saw like this with a 64mm rod and 36mm stroke, that works out to 1.4mm = 20* or 3mm = 30. Since I have no key, I stuffed a piece of ~2.5mm wire in squish band and set the flywheel to the same location as on the 61.. there's not a trace of a timing mark I can find on there, so it's a bit of a guess as to when the coil fires.. haven't put a timing light on it to see where for sure.
I just looked at the frequency analysis of the video I took of it running, it seems to make good power from about 6500 RPM to 9000, free revving to about 11,500.. starts to bog under 5000. I'm going to have to spend some time on that chain to make it actually cut.. rakers have to go down at least .010".
I just looked at the frequency analysis of the video I took of it running, it seems to make good power from about 6500 RPM to 9000, free revving to about 11,500.. starts to bog under 5000. I'm going to have to spend some time on that chain to make it actually cut.. rakers have to go down at least .010".