Installation Of Spark Plug - Rotax MML-912 Maintenance Manual

14.2.3) Installation of spark plug

Cleaning
Before every installation, the spark plug thread and the spark plug seat at
the cylinder head should be cleaned (e.g. to remove residue of heat con-
duction compound).
Installation
Apply small amount of heat conduction compound to spark plug thread
and tighten spark plug to 20 Nm (177 in.lb) on the cold engine.
spark plugs
Graphic
Fig. 30
Effectivity: 912 Series
Edition 2 / Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Eyes and skin irritation!
WARNING WARNUNG
Rinse off with water in the case of contact with eyes or
skin. May be harmful if swallowed.
Always replace both spark plugs of a cylinder and do
NOTICE
WARNUNG
not interchange spark plugs between cylinders.
Heat conduction compound at the ground electrode (1)
NOTICE
WARNUNG
or the head area (2) can lead to ignition problems. Ap-
ply heat conduction compound sparingly and do not
apply to the first three threads.
Electrode gap
1
2
Part
1 Ground electrode
2 Head area
Function
12-20-00
October 01/2009
00086
page 65