Maintenance and Adjustments
Teledyne Continental Motors, Inc.
TM
9-18
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
Table 9-4.
Approved Spark Plug List
Manufacturer Part Number TCM Part Number Barrel Size GAP
CHAMPION
RHB32E
634675
¾”-20
.016” - .021”
RHB36S
646631
¾”-20
.016” - .021”
RHB32S
646632
¾”-20
.016” - .021”
AUTOLITE by UNISON
URHB32E
655908
¾”-20
.016” - .021”
BENDIX AUTOLITE
PL350 635148
¾”-20
.015”
-.018”
6.
Clean the spark plugs (new or re-used) as directed in the “Cleaning” section in
Chapter 9. Set the spark plug gap using manufacturer’s data for the appropriate part
number.
CAUTION: Failure to install a new spark plug gasket with the spark
plug may result in incomplete sealing of the combustion chamber,
loss of spark plug heat transfer, spark plug overheating, possible re-
ignition/detonation, and internal engine damage.
7.
Install a new copper gasket on all 12 spark plugs.
8.
Refer to the spark plug rotation chart (Figure 9-7); mark serviceable spark plugs with
the respective “destination” positions. For all remaining locations, replace with a new
spark plug.
1
3
5
2
4
6
T
B
T
B
T
B
T
B
T
B
T
B
CYLINDER
NUMBER
CYLINDER
NUMBER
FROM
TO
1 TOP
6 BOTTOM
1 BOTTOM
6 TOP
SPARK PLUG ROTATION
2 TOP
5 BOTTOM
2 BOTTOM
5 TOP
3 TOP
4 BOTTOM
3 BOTTOM
4 TOP
4 TOP
3 BOTTOM
4 BOTTOM
3 TOP
5 TOP
2 BOTTOM
5 BOTTOM
2 TOP
6 TOP
1 BOTTOM
6 BOTTOM
1 TOP
1
3
5
2
4
6
T
B
T
B
T
B
T
B
T
B
T
B
CYLINDER
NUMBER
CYLINDER
NUMBER
FROM
TO
1 TOP
6 BOTTOM
1 BOTTOM
6 TOP
SPARK PLUG ROTATION
2 TOP
5 BOTTOM
2 BOTTOM
5 TOP
3 TOP
4 BOTTOM
3 BOTTOM
4 TOP
4 TOP
3 BOTTOM
4 BOTTOM
3 TOP
5 TOP
2 BOTTOM
5 BOTTOM
2 TOP
6 TOP
1 BOTTOM
6 BOTTOM
1 TOP
1
3
5
2
4
6
T
B
T
B
T
B
T
B
T
B
T
B
CYLINDER
NUMBER
CYLINDER
NUMBER
FROM
TO
1 TOP
6 BOTTOM
1 BOTTOM
6 TOP
SPARK PLUG ROTATION
2 TOP
5 BOTTOM
2 BOTTOM
5 TOP
3 TOP
4 BOTTOM
3 BOTTOM
4 TOP
4 TOP
3 BOTTOM
4 BOTTOM
3 TOP
5 TOP
2 BOTTOM
5 BOTTOM
2 TOP
6 TOP
1 BOTTOM
6 BOTTOM
1 TOP
Figure 9-7.
Spark Plug Rotation Chart
