MSW Motor Technics MSW-MOE-G-1.5 Manual De Instrucciones página 49

To access the plug, unscrew a part of the motor cover and then remove the
ignition cable boot from the plug. Then you can unscrew the spark plug itself. In
the MSW-MOE-G-2.5 and MSW-MOE-G-6.5 models no cover needs to be
removed, the spark plug and boot are on top. Install in reverse order.
CAUTION: Remove and install the spark plug only when the motor is cold! When
installing a new spark plug, after initially screwing it into its socket, tighten it with
the spanner exactly ½ full turn of the spanner. In the case of a used plug, tighten
it in the socket a maximum of 1/8-1/4 of a full turn of the spanner.
3.4.4 Transmission fluid - checking/replacement
The condition of the transmission fluid in the propeller transmission mechanism
should be checked according to the schedule in the table.