Rato 60-7559-6 Manuel Du Propriétaire page 22

MAINTENANCE
(2) Clear away dirt around the spark plug
base.
(3) Dismantle the spark plug with a spark
plug wrench.
(4) Visually check the spark plug. Clean
with a steel brush. If the insulator
is damaged, replace the spark plug
instead.
(5) Measure the spark plug clearance with a
feeler. The clearance should be 0.7~0.8mm.
If adjustment is necessary, bend the side
electrode carefully.
(6) Check if the spark plug gasket is in good
conditions. In order to screw thread
misplace, screw in by hand.
(7) Screw on the spark plug to the bottom first by hand and then screw in
by a spark plug wrench and compress the gasket.
-- If a new spark plug is used, more twist 1/2 turns after compressing
the gasket.
-- If reinstalling the used spark plug, just more twist 1/8-1/4 turns.
Don't touch the muffler in running and just gasoline engine stopping
stage to avoid burn.
The spark plug must be tightened securely, or it may become very
hot to damage the engine.
· 19 ·