November 3, 1960
Bulletin No. SB-807
Shroud Groups
SUBJECT: Sealing bottom shroud - rear; - 40 and 75 H.P. Engines.
It is common practice to leave the carrying handle off of the 40 and 75 H.P.
engines in many installations. This, of course, is at the discretion of the
owner or dealer. However, when the handle is not attached, the mounting holes
are often left open. This permits water to be sprayed on the spark plugs,
resulting in misfiring, or on other parts of the powerhead. By allowing sound
to escape, it also makes the engines sound noisier. In salt water areas the
results are quite obvious.
Shortly after beginning production of the 1961 model engines, this problem
was overcome by installing nylon plugs in these screw openings from the
inside of the shroud. The plug is Part No. 306656 which effectively seals
the opening and prevents the entrance of water.
It is recommended that you check all 1961 model engines prior to delivery
for the presence of these plugs. If no plugs are in place and no carrying
handle will be used, be sure to install the 306656 plugs. This is part-
icularly true on the 75 H.P. alternator model engine due to the location
of the coil.
It would also be to your advantage to install these plugs on any older
engines which do not have carrying handles installed to prevent occasional
inexplainable misfiring.
JOHNSON MOTORS
W. W. DeWees
W. W. DeWees
Service Department
WWD:eb
NOTE: Post on your RD and V4 index - 40 & 75 H.P.