Generac Power Systems GP6500 Repair Manual

SECTION 3.3
DIAGNOSTIC TESTS
Page 45
Figure 7. Tachometer
METAL STOCK
1/4" THICK STEEL
12"
1.0"
4"
2"
2.625"
3.5"
0.5"
0.5"
DRILL TWO HOLES — 1/2"
FOR STARTER
MOUNTING BRACKET
DRILL TWO HOLES — 1/2"
FOR MOUNTING TACHOMETER
TA P FOR 1/4-20 NC SCREWS
Figure 8. Test Bracket Dimensions
TEST BRACKET:
A starter motor test bracket may be made as shown in
Figure 8.
REMOVE STARTER MOTOR:
It is recommended that the Starter Motor be removed
from the engine when testing Starter Motor perfor-
mance. Assemble starter to test bracket and clamp
test bracket in vise (Figure 9).
TESTING STARTER MOTOR:
1. A fully charged 12 volt battery is required.
2. Connect jumper cables and clamp-on ammeter as
shown in Figure 9.
3. With the Starter Motor activated (jump the terminal on the
Starter Contactor to battery voltage), note the reading on
the clamp-on ammeter and on the tachometer (rpm).
STARTER
CONTACTOR
STARTER
MOTOR
TACHOMETER
12 VOLT
BATTERY
CLAMP ON
AMP METER
VISE
Figure 9. Testing Starter Motor Performance
Note: Take the reading after the ammeter and
tachometer are stabilized, approximately 2-4
seconds.
4. A starter motor in good condition will be within the fol-
lowing specifications:
Minimum rpm 4500
Maximum Amps 50
Note: Nominal amp draw of starter in generator is
60 amps.
TEST 25 – CHECK IGNITION SPARK
PROCEDURE:
A commercially available spark tester may be used
to test the engine ignition system. One can also be
purchased from Generac Power Systems (Part No.
0C5969).
1. Disconnect the spark plug lead from a spark plug.
2. Attach the high tension lead to the spark tester terminal.
3. Ground the spark tester clamp by attaching to the cylin-
der head (see Figure 10).
DC CONTROL
PART 3

Generac Power Systems GP6500 Specifications

General

Brand	Generac Power Systems
Model	GP6500
Category	Portable Generator
Language	English