We're getting off-topic here, but the manual says .006 inch for valve clearance, looks like for both intake and exhaust.
One thing here is the manual states if the compression is over 100 psi, the ACR is malfunctioning. If under 71 psi, then check valve clearance. The reading I'm getting was 140 psi which per the manual indicates a malfunctioning ACR. Regardless I'm not going to spend any more time on this lawn tractor.
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