December 26, 1961
Bulletin No. SB-886
Trouble Shooting
SUBJECT: Water in cylinders
50 h.p. V4(SL)-10 thru 11B;
75 h.p. V4S(L)-12 thru 14;
75 h.p. V4A(L)-13 thru 14.
A gasket is now being used between the inner exhaust tube flange and the adapter
plate in currently manufactured V-75 engines. The gasket has been added because of
heat warpage in this area which occasionally allows water vapor to enter the exhaust
tube and find its way into the cylinders via the exhaust ports. Although this gasket
is currently being installed in assembly, the first few 1962 V-75 models were built
without it. The illustration shows the gasket's position on the adapter's underside.
This gasket will also fit the subject V-50 and V-75 engines prior to 1962. Whenever
it is necessary to remove the powerhead for any reason, the gasket should be installed
to insure against the possibility of this problem occurring at some future time.
The gasket's part number is 309064, and is available from your parts distributor at
the list unit price of $.10 each, subject to the standard parts discount.
JOHNSON MOTORS
W. W. DeWees
W. W. DeWees
Service Department
WWD:eb
NOTE: Post on your V-50 and V-75 indexes.