Re: How to Compression test
Huh? Guess we'll never solve this arguement. That is how a two-stroke works, no arguement about that. But the fact is that even at cranking speeds and with throttle closed, there is air pressure in the crankcase on the downstroke, (increased density, not reduced density) That air pressure, being greater than atmospheric, is what causes the air/fuel charge to blow into the cylinder through the intake ports when they open. The motor would not start or run if it were not for that positive pressure in the crankcase. At cranking speeds both intake and exhaust ports are open for so long that that pressure is equalized long before the ports close on the upstroke. That puff of fuel/air is still in there though, and gets compressed, beginning at atmospheric at the time of ports closure and gets compressed trom there. I rest my case and will shut up now.
