Spark Plugs - BOMBARDIER 1983 Shop Manual

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O NOTE: The 1983 Bombardier snowmobiles are using
two (2) spark plug types . One type is the Bosch spark
plug and the other type is NGK spark plug.
BOSCH SPARK PLUG TYPE
SPARK PLUG NUMBERING SYSTEM
Bosch has introduced a new numbering code for its com-
plete line of spark plugs. The new code is shorter, therefore
easier to use. The following charts will assist you in making
the change-over easily and effectively.
IMPORTANT: The new code has a different heat range
identification system.
High number
Low number
hot plug
cold plug
1983 CROSS REFERENCE CHART
List of Bosch spark plugs used on 1983 Bombardier snow-
mobiles.
New number Old number
M7A
M 175 T 1
O
NOTE: To convert from Bosch to NGK spark plugs,
see Service Bulletin 82-12.
SECTION 04 ELECTRICAL
SUB-SECTION 03 (SPARK PLUGS)
SPARK PLUGS
NGK SPARK PLUG TYPE
SPARK PLUG NUMBERING SYSTEM
Bombardier is using the NGK spark plug type on most of
the 1983 snowmobile models.
The heat range identification system is:
High number
Low number
cold plug
hot plug
1983 CROSS REFERENCE CHART
List of NGK spark plugs used on 1983 Bombardier snow-
mobiles.
BR-7ES
BR-8ES
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