Johnson Service Bulletin SB-746 - Optional Propellers for 75 HP Engines
January 13, 1960. Propeller options and dealer exchange instructions for Johnson 75 HP V4S-series engines.
January 13, 1960
Bulletin No SB-746
SUBJECT: OPTIONAL PROPELLERS - 75 H.P. ENGINES.
Optional propellers have been available for the 1960 model V4S series engines for
some time. Unfortunately, we continue to receive complaints of poor performance
which indicates dealers may not be taking full and complete advantage of the pro-
peller options.
Under the propeller option program, the purchaser of a 75 H.P. engine is entitled
to any one (1) of three propellers at the time of purchase, free of additional charge.
Which propeller the customer uses is dictated by the characteristics and requirements
of his specific boat, motor and load combination. It must be remembered the majority
of customers are unaware of the conditions governing propeller selection, and are there-
fore completely dependent upon the dealer to determine and select the propeller for him.
Do not risk customer dissatisfaction since it adversely affects confidence in you.
The program for handling these propeller options will be carried out as follows:
Each 75 H.P. engine shipped from the factory contains a 10" x 11" propeller in-
dividually packaged. If the dealer determines this propeller is not the most
desirable one as indicated on the enclosed propeller selection chart, which is also
included with each motor, the dealer shall take either of the two remaining options
from his stock and install it on the engine. (These two remaining options are the
10" x 12", part #378039, and the 10¼" x 10", part #378040.) BOTH OF THESE PROPELLERS
MUST BE OBTAINED FROM YOUR PARTS DISTRIBUTOR.
(continued)
The 10" x 11" propeller supplied with each engine, if not used, will be returned to
Johnson Motors for a cash refund. To facilitate handling, accumulate these propellers,
in their individual cartons to avoid damage in transit, and make only one shipment
every 30 days, transportation charges prepaid. Please note that to receive the cash
refund, these propellers must be returned to the factory in new and unused condition,
and packaged in the original carton. If these requirements are not adhered to, credit
will not be issued.
Under this program it should be obvious to the dealer that there are three (3)
extremely important obligations to meet. These are:
(1) Maintain an inventory of both 10" x 12" and 10¼" x 10" propellers.
(2) Determine which propeller will permit the 75 H.P. engine to realize its
full potential on the basis of the customer's specific boat and load
requirement. Experience with various size boats and loads should event-
ually enable you to judge, with the aid of the propeller selection chart,
whether or not the standard propeller approaches the required size with-
out constant trial and error.
(3) Return new and unused 10" x 11" propellers in their original cartons,
transportation charges prepaid.
- 2 -
Finally, the correct propeller installation will, in addition to providing
improved performance, also protect the engine from premature failure by minim-
izing 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 Department
WD:eb
NOTE: Post on your V4 series index - 75 H.P.
Factory follow-up notice
Johnson subsequently advised dealers that the propeller selection charts had been omitted from both SB-746 (75 HP) and SB-761 (40 HP), and instructed them to attach the charts to their respective bulletins.
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.
