Generac Power Systems CorePower User Manual

ENGINE/DC CONTROL
PART 4
Page 67
Section 4.5
Diagnostic Tests
Figure 43. Clamp-On Ammeter
Tachometer
A tachometer is available from your parts source. The
tachometer measures from 800 to 50,000 rpm, (see Figure
44).
Figure 44. Tachometer
Test Bracket
A starter motor test bracket may be made as shown in Figure
45. A growler or armature tester is available from an automobile
diagnostic service supplier.
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
TAP FOR 1/4-20 NC SCREWS
Figure 45. Test Bracket
Remove Starter Motor
It is recommended that the starter motor be removed from
the engine when testing starter motor performance. Assemble
starter to test bracket and clamp test bracket in vise, Figure 46.
Testing Starter Motor
1. A fully charged 12 volt battery is required.
2. Connect jumper cables and clamp-on ammeter as shown
in Figure 46.
Note: The starter motor will activate immediately once the
cables are connected
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
MOTOR
TACHOMETER
12 VOLT
BATTERY
CLAMP ON
AMP METER
VISE
Figure 46. 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
following specifications:
Minimum rpm 4500
Maximum Amps 9
TEST 60 – CHECK FUEL SUPPLY AND
PRESSURE
Discussion
The air-cooled generator was factory tested and adjusted
using natural gas as a fuel. If desired, LP (propane) gas may
be used. However, when converting to propane, some minor
adjustments are required. The following facts apply:
•An adequate gas supply and sufficient fuel pressure must be
available or the engine will not start.
•Minimum recommended gaseous fuel pressure at the
generator fuel inlet connection is 5 inches water column
for natural gas (NG) or 10 inches water column for LP gas.

Generac Power Systems CorePower Specifications

General

Brand	Generac Power Systems
Model	CorePower
Category	Portable Generator
Language	English