Posted by jdemaris on October 02, 2010 at 08:43:47 from (72.171.0.145):
In Reply to: Bench testing a starter posted by Zachary Hoyt on October 02, 2010 at 07:21:34:
For bench testing, starters are rated by amp draw at free-spin testing, RPMs, and amp draw with armature locked.
It's not something I usually do. If you're used to fooling with them, you can pretty much tell just by how they sound when you hook a battery to them.
VAC usually has an Autolite MZ-4114 6 volt-system starter, made to work properly at 4.5 to 5 volts.
Test as thus: No load - hooked to a good 6 volt batttery - voltage at starter should read 5 volts, RPMs should be 4000, and amperage draw is 68 amperes.
If you lock the starter so it cannot turn, voltage should drop to 2 volts, and amperage draw should jump to 280 amperes. Torque at that time being made is 4.4 foot pounds at the starter-drive.
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