Shut-Down Procedure - Lycoming O-290 Operator's Manual

SECTION 3
OPERATING INSTRUCTIONS

9. SHUT-DOWN PROCEDURE.

a. Idle engine at approximately 800 to 900 RPM until there is a decided drop in cylinder head
temperature.
b. Move mixture control to "Idle Cut-Off".
c. After engine stops, set magneto switch at the "off" position; this will prevent after-firing.
3-10
LYCOMING OPERATOR'S MANUAL
O-235 AND O-290 SERIES