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At 07:31 PM 6/5/03 -0500, William R. Bayne wrote:
>The Continental Operator's Manual, Form X30012 (1980) states:
>
> "If no drop in RPM is observed when operating on either magneto
alone,
> the switch circuit should be inspected.
>
> WARNING. . .Absence of RPM drop when checking magnetos may
indicate
> a malfunction in the ignition circuit. Should the propeller be
> moved by hand (as during preflight) the engine may start and
cause
> injury...
I might also add that turning the switch off and back on (at very low RPM,
or idle)
is an excellent (but occasional) post flight exercise. The motor should
die, then
spring back to life. This checks the P-lead to be sure the switch is
acturlly
grounding the mags.
Percy in Portland
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