Posted 08-10-2003 at 21:50:59
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The compression release is a little "lever" on the cam that catches the exhaust valve tappet on the compression stoke, and "blips" the exhaust valve open for a short time, relieving some of the compression. When the engine starts, a weight moves, and allows the mechanism to move out of the way, and not contact the exhaust valve tappet.
Unless the engine has been apart, and the little "lever" grossly bent, I doubt the ACR is causing your "no-start" condition.