STARTING MOTOR SERVICE TEST SPECIFICATIONS.
Prestolite specifications for 12-volt starting motors installed as standard equipment on PA-28 series
airplanes are as follows:
CHART 8002. STARTING MOTOR SERVICE TEST SPECIFICATIONS
Aircraft Model PA-28RT-201 PA-28RT-201T
Motor Model MZ-4206 MCL-6501
Min. Brush Tension 32 oz. 32 oz.
Max. Brush Tension 40 oz. 40 oz.
No-Load Test (77° F) (75° F)
Volt 10 6
Max. Amps 75 65
Min. R.P.M. 2000 4900
Stall Torque:
Amps 560 410
Min. Torque, Ft.-Lbs. 38.0 8
Approx. Volts 4.0 2.0
Pinion Position:*
Drive at Rest 1.748 in. to 1.855 in.
Drive Extended 2.388 in. to 2.495 in.
*This dimension is measured from the centerline of the mounting hole nearest the drive end head to the
edge of the pinion.
STARTING THROUGH EXTERNAL POWER RECEPTACLE WITH AIRPLANE’S BATTERY
NEARLY DEPLETED.
When using a 12-volt battery for external power starting and the airplane’s battery is nearly depleted, the
following procedure should be used:
1. Disconnect the airplane’s battery at the negative terminal to prevent excessive loading of the external
starting battery.
2. Check that all of the airplane’s electrical equipment is turned OFF.
3. Connect the external battery to the external power receptacle; turn master switch ON and start engine
using normal starting procedure.
4. Turn master switch OFF; remove external battery, and then reconnect the battery at the negative
terminal.
5. Turn master switch ON.
—END—
80-10-15
Page 80-10
December 1, 1978
3G21
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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