Checking O2 levels without drilling holes in exhaust systems; see pics...
That's
how its done.
Strap the tail wheel securely to a pole or pickup truck's tow hitch and run WOT
at engine operating temps.
I've had my 80hp idle smooth at 600rpm while setting idle mixtures and balancing
carbis.. the 100hp will probably tick over nicely at 1000rpm without a fuss
during tuning... Anything below 500rpm on either spec engine will see the
ignition
modules shut down.
Once tuning is set it won't have any reason to alter; check it at each 100hr or
annual if desired.
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