January 18, 1960
Bulletin No SB-761
SUBJECT: OPTIONAL PROPELLERS - 40 H.P. Engines.
Optional propellers are available for the 1960 model RD series just as they are
for the 75 H.P. engine. It is also just as important that the 40 H.P. engine be
equipped with the correct propeller. This optional propeller program will be basic-
ally function similar to the 75 H.P. program with minor exceptions. The purchaser
is entitled to any one of four options at the time of purchase, free of additional
charge. Which propeller he uses is dictated by the characteristics and ultimate
requirements of his specific boat, motor and load combination. Do not risk
customer dissatisfaction by disregarding this important service!
Each 40 H.P. engine currently shipped has the 10 3/8" x 13 1/4" propeller assembled on
the motor. If it is determined this is not the most desirable propeller as
indicated on the enclosed propeller selection chart, which is also included with
each motor, the dealer shall take either of the three remaining options from his
stock and install it on the engine. (These three remaining options are the 10 3/8"
x 11 1/2", part 377410; 10 3/8" x 12 1/2", part 277580 and 10 3/8" x 14", part 278194.)
ALL OF THESE MUST BE OBTAINED FROM YOUR PARTS DISTRIBUTOR.
NOTE: The first 40 H.P. engines built for 1960 were equipped with the 10 3/8" x 14"
propeller as standard equipment. These are readily adaptable to light and
relatively fast runabouts. We therefore suggest using these propellers to
build your inventory and maintaining it thereafter as required.
The 10 3/8" x 13 1/4" standard equipment propeller, if not used, will be returned to
Johnson Motors for a cash refund. To facilitate handling, accumulate these propellers,
packed in the carton of the optional propeller which replaced it to avoid damage in
transit, and make only one shipment every 30 days, transportation charges prepaid.
Note that to receive the cash refund, propellers must be returned to the factory new
and unused, and packaged in the carton of the optional propeller which replaced them.
Credit will be issued only if the foregoing instructions are followed.
It is obvious the dealer has three extremely important obligations to meet. These are:
(1) Maintain an inventory of the three propeller options.
(2) Determine which propeller will permit the 40 H.P. engine to realize its full
potential on the basis of the customer's specific boat and load requirements.
Experience with various size boats and loads should eventually enable you to
judge, with the aid of the propeller selection chart, whether or not the
standard propeller approaches the required size without constant trial and
error.
(3) Return new and unused 10 3/8" x 13 1/4" propellers packaged in the cartons of the
optional propellers which replaced them, transportation charges prepaid.
Finally, the correct propeller installation will in addition to providing improved per-
formance, also protect the engine from premature failure by minimizing low rpm operation
at full throttle. The propeller options are available! Be certain to take proper
advantage of them!
JOHNSON MOTORS
W. W. DeWees
W. W. DeWees
Service Dept.
WD:eb
NOTE: Post on your RD series index 40 H.P.
These propeller selection charts were erroneously omitted
from the mailings of Service Bulletins SB-761 and SB-746
Optional propellers, 40 and 75 H.P. engines respectively.
Please attach each chart to its respective bulletin for
future reference.
JOHNSON MOTORS
W. W. DeWees
W. W. DeWees
Service Department
WWD:eb