Re: Starter won't crank
Posted by Owen_Dyneto On 2011/12/8 11:56:27
Cables for 6-volt systems and a short run should be at least 1 gauge (as were most OEM cables). O gauge would be better, and 00 if the length of run is extreme, as for some prewar seniors with the battery in the golf club compartment floor.
A 6-volt battery in good condition and state of charge should measure about 6.6 volts at rest. Best tests are load tests and measurement of the specific gravity of the electrolyte, which should be about 1.275 for a fully charged battery.
A meaningful test of a starter motor is to measure the current (amperage) draw, running free and under load. These specs can often be found in Motor's Manuals. Use a meter like the enclosed; it has a U-shaped sleeve on the back which you just place over the cable - no connections required.
Just looking at some values for postwar Packard thru 1950 (except Custom 8 which had a unique starter) for AutoLite starters (Delco units are slightly different), typical numbers are:
No load: 65-75 amps @ 5.5 volts.
Load: 410 amps @ 2.0 volts.
Most of these starters give about 8-18 ft-lbs of torque except the Custom 8 (356 engine) which provides about 45 ft-lbs. Data from Motor's Manual.
Attach file:
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A 6-volt battery in good condition and state of charge should measure about 6.6 volts at rest. Best tests are load tests and measurement of the specific gravity of the electrolyte, which should be about 1.275 for a fully charged battery.
A meaningful test of a starter motor is to measure the current (amperage) draw, running free and under load. These specs can often be found in Motor's Manuals. Use a meter like the enclosed; it has a U-shaped sleeve on the back which you just place over the cable - no connections required.
Just looking at some values for postwar Packard thru 1950 (except Custom 8 which had a unique starter) for AutoLite starters (Delco units are slightly different), typical numbers are:
No load: 65-75 amps @ 5.5 volts.
Load: 410 amps @ 2.0 volts.
Most of these starters give about 8-18 ft-lbs of torque except the Custom 8 (356 engine) which provides about 45 ft-lbs. Data from Motor's Manual.
Attach file:
(20.98 KB)
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