Spark Plug; Cylinder Cooling Fins - Maruyama BIG M M23S Manuel De L'utilisateur

Spark Plug

Maintenance Interval:
The spark plug should be removed from the engine and checked after each 25 hours of operation.
Replace the spark plug after every 100 hours of operation.
Maintenance:
1. With the engine at ambient (room) temperature, twist the high-tension lead boot on the spark plug back
and forth a couple of times to loosen boot, then pull the boot off of the spark plug.
2. Remove the spark plug.
3. After removing the spark plug, the electrodes can be cleaned
with a stiff brush.
4. Adjust the electrode air gap to 0.6-0.7 mm (0.024-0.028 in.).
5. Replace the spark plug if it is oil-fouled, damaged or if the
electrodes are worn down.
6. Do not over tighten the spark plug when installing.
The tightening torque is 10.7-16.6 Nm (95-148 in. lbs.)

Cylinder Cooling Fins

Maintenance Interval:
The cylinder cooling fins should be cleaned after every
25 hours of operation or once a week whichever comes
first. Air must flow freely around and through the
cylinder cooling fins to prevent engine overheating.
Leaves, grass, dirt and debris build up on the fins will
increase the operating temperature of the engine which
can reduce engine performance and shorten engine life.
Maintenance:
1. With the engine at ambient (room) temperature,
remove the one screw retaining the muffler cover,
then remove the muffler cover.
2. Loosen the cylinder screw and lift off the
cylinder cover.
3. Clean all dirt and debris from the cooling fins
and from around the cylinder base.
4. Reinstall the cylinder and the muffler covers.
MUFFLER
COVER
CYLINDER
COVER
.6 -.7 MM
CYLINDER
COVER
CYLINDER COVER
SCREW
17