BOMBARDIER 1980 Shop Manual page 215

SECTION 04
SUB-SECTION 06 (SPARK PLUGS)
GERMANY
EXPLANATION OLD SYSTEM
Example:
M For Marine Engines, resistant to seawa-
ter
P Electrodes with Platinum Tips
S Silver Center Electrode
X Wide-Gap Electrodes - .060"
X4 Wide-Gap Electrodes -
.044
11
X6 Wide-Gap Electrodes - .060
11
Thread Reach
ER Shielded, water-proof; built-in
burn-off resistor
M Plugs for 2-cycle engines
P Electrodes of precious metals
R Suppressor resistor, 5000 ohms,
built~in
S Silver ground electrode
T Standard type
Z Semicovered front electrode
L-------il
Heat Range
A SAE conical seat
AK Miniplug with tapered seat
B SAE connector dimensions, for
7 mm dia. cable
C SAE connector dimensions, for
5 mm dia. cable
L-------JI
D Glide-air-gap spark plug with
conical seat
E Surface gap (C.D. ignition)
G Glide-air~gap
spark plug with
control electrode
K Mini-plug with special connector
KA Mini-plug
V Booster gap
Thread
M
L--_ _ _
--II
u
M 18 X 1.5
M 10 X 1
M14X1.25
M 12 X 1.25
t"-18SAE
(SPARK PLUGS). PAGE 2
W
X
Z
EXPLANATION NEW SYSTEM
Example:
X wide gap
.044" (1.1 mm)
V wide gap
.060" (1.5 mm)
0J
1 special
2 shell or
3 electrode
4 designs
5
Thread Reach:
A
Thread reach -.460" standard
electrode
B
Thread reach .460" extended
tip electrode
C
Thread reach
ill
regular
electrode
D
Thread reach
ii'
extended tip
E Thread reach
i"
regular
electrode
F Thread reach
ill
extended
tip
electrode
p
Platinum electrode
S Silver electrode
'-----..,1
Heat Range
B SAE connector for 7 mm
diameter cable
C SAE connector for 5 mm
diameter cable
E Surface gap
R Resistor
S Mini-plug
Thread:
D 18 mm thread diameter
tapered seat
L
_ _ _ _ _ _
-II
H 14 mm thread diameter
tapered seat
M 18 mm thread diameter
U 10 mm thread diameter
W 14 mm thread diameter
X 12 mm thread diameter