October 17, 1961
Bulletin No. SB-871
Propellers
SUBJECT: Propellers for 1962 engines.
28 h.p. RX(L)-10C;
40 h.p. RD thru RDS(L)-24, (standard shift);
40 h.p. RK(L)-24, (electric shift);
75 h.p. V4S(L)-14, (standard shift);
75 h.p. V4A(L)-14, (electric shift).
There have been several propeller changes involving the subject 1962 engines.
First, both the 28 and 40 h.p. standard shift engines will use the same propellers
formerly used only on the 40 h.p. engines. These propellers are part numbers 277580,
277617, 278194 and 377410.
Second, all 40 h.p. engines, both standard and electric shift, will be shipped with a
10 3/8 x 13¼ P. propeller as standard equipment instead of the 10 3/8 x 14 specified
in the 1962 Buyer's Guide.
Third, the electric shift (Electramatic) 40 h.p. engine requires a propeller with a
slightly modified hub to provide gearcase clearance. The various propellers available
for this model engine are as follows:
PART NO. DIA. x PITCH LIST PRICE
378571 10 3/8 x 14 $11.00 less parts discount
378579 10 3/8 x 13¼ 11.00 less parts discount
378580 10 3/8 x 12½ 11.00 less parts discount
378581 10 3/8 x 11½ 11.00 less parts discount
All of these new propellers are available from your Parts Distributor. Because of the
importance in using the correct propeller for a given boat and load combination, be
sure you carry the most popular sizes in stock for the electric shift 40 h.p. engine.
Keep in mind that the most efficient, and recommended, engine rpm range is 4400 to 4800.
Install the propeller which will permit the engine to turn as close as possible to 4800
rpm with the lightest contemplated load. Measure rpm with a reliable tachometer and
accordingly install the correct propeller so the customer will run his engine properly
equipped the first time he operates it.
Fourth, the 1962 V-75 engines, both standard and electric shift, will be shipped with a
10 1/8 x 10 propeller as standard equipment instead of the 10 x 11 specified in the 1962
Buyer's Guide. There are no other changes in propellers for the V-75 engines.
JOHNSON MOTORS
W. W. DeWees
Service Department
WWD:eb
NOTE: Post on your RX, RD (40 h.p.) RK and V-75 indexes.