Service manual

STARTING SYSTEM SERVICE MANUAL NUMBER 26
Page 4A-12 90-861329--1 MARCH 1999
PG260 Starter Motor
PG260 Specifications
Delco I.D. Number MerCruiser Part Number
9000820 50-806963
No Load Test
Brush Spring
Engine
Rotation
Volts
Min.
Amps
Max. Amp Min. rpm Max. rpm
Brush Spring
Tension Oz.
(Grams)
LH 10.6 60 95 2750 3250
83-104 oz. (2352-
2948)
Pinion Clearance .101-.160 (.025-4.06mm)
Bearing Depth (Gear) .011-.014 (0.28-.038mm) Maximum
Bearing Depth (Housing) .009-.017 (0.4mm) Maximum
Torque Specification
Fastener Location lb-ft Nm
Starter Mounting Bolts 30 41
Fastener Not Listed Tighten Securely
NOTE: The PG260 starter cannot be rebuilt. The only replacement components available
are the solenoid and drive housing.
Description
The Delco PG260 starter motor features small permanent magnets mounted inside the field
frame. These magnets take the place of current-carrying field coils mounted on iron pole
pieces. Internal gear reduction, approximately 4 to 1, through planetary gears results in
armature speeds in the 7000 rpm range. The armature and drive shaft are mounted on roller
or ball bearings in place of bushings. The solenoid switch, plunger, return spring, and shift
lever are permanently mounted in the drive housing.
CAUTION
The starter motor is designed to operate under great overload and produce a high
horsepower for its size. It can do this only for a short time, since considerable heat
accumulates and can cause serious damage. For this reason, the cranking motor
must never be used for more than 30 seconds at any one time. Cranking should not
be repeated without a pause of at least 2 minutes to permit the heat to escape.
INDEX