September 28, 1960
Bulletin No. SB-801
Spark Plugs
SUBJECT: FACTORY APPROVED AND RECOMMENDED SPARK PLUGS.
This bulletin is written to clarify the apparent confusion on approved
spark plug recommendations made within the past several months.
There are three types of approved plugs, all of which are very satis-
factory for use in all Johnson engines ranging from 3 through 75 H.P.
In those engines developing 35, 40, 50 and 75 H.P., a set of these
approved plugs is a necessity to avoid the possibility of unsatisfactory
engine performance and possible internal powerhead damage.
The factory approved and recommended spark plugs are:
Champion J4J
Auto-lite A21X
AC M42K
and
JOHNSON MOTORS
W. W. DeWees
W. W. DeWees
Service Department
WWD:eb
NOTE: Post on your Miscellaneous index.
Destroy service bulletin Numbers:
670 dated 7/29/58
695 dated 2/24/59
SB-773 dated 3/21/60
SB-775 dated 4/4/60
SB-785 dated 6/3/60
SB-786 dated 6/3/60