Re: Bendix Scintilla coil numbers

[20mercman]

Well, I just went and looked it up. The 399-756 is the older coil. It has the higher resistance on the coils I have measured, which threw me when I read this the first time. I had suspected as Mr. Asa has suggested that the higher resistance would have more turns…. From the Mercury manual. "The new, high-output coil 399-125 has a green plastic sleeve on the primary lead. The primary lead has but one wire on the coil, while the ground wire is composed of 2 wires. These leads both come out of the same end of the coil. The 399-756 coil primary lead has 2 wires, while the ground wire has but one. There are 2 types of this coil, one with both leads leading out of the one end, the other with one lead out of each of the ends. (The latter is the obsolete type.) " "The readings of the 399-125 coil are listed on the Test Data Chard, preceding. This coil has a different interior winding resulting in a much higher amperage or primary index reading. Some of the high output is derived from the new high output rotor (20599), a 2 pole rotor." When I go back and look at the Test Data Chart, it shows the same specs for both coils. 2.1 max amps, and a secondary Continuity of 50 max. I would surmise that these readings are off of the Merotronic tester, as they don’t seem to translate directly to my ohm meter readings.

Steve