SUBJECT: Propeller torque fixture assembly, part #378448;
10, 18, 25, 28, 30, 35, 40, 50 and 75 h.p.
Currently available is the propeller torque fixture assembly illustrated in figure 1. It will remove the guesswork in determining whether a propeller's rubber slip clutch is performing satisfactorily, or whether it is slipping at a torque lower than specified, which thus reduces the engine's propelling efficiency to an unsatisfactory level. In cases of the latter condition, the tool will also serve as a "sales clincher" by demonstrating to the customer that his slipping propeller should be replaced with a new one.
Figure 2 illustrates how the fixture is used in testing propellers for hub slippage. In addition to the fixture, a torque wrench... not necessarily the type shown... is also required. Since the various torques for testing Johnson propellers range from a low of 65 feet pounds for the QD and FD series engines to a high of 345 feet pounds for the V-50 series, torque wrenches spanning this range are a necessity in order to utilize the fixture to its fullest sales potential as well as maintaining propeller efficiency for the customer.
While the assembly includes all of the detail parts illustrated in figure 1, only those identified by part numbers, listed below, are individually available as required for servicing the assembly. Net unit prices are as follows, F.O.B. Galesburg, Illinois.
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