Generac Power Systems TXP - Manual (Page 37)

TEST 30
CHOKE
A.) Hold the Start/Stop Switch at
START position and crank engine.
While the engine is cranking, the
Choke Solenoid should pulse., the
choke from a ”No-Choke” to a
’’Choke’’ position, at a rate dep­
endent on ambient temperature.
RESULTS: 1.) Choke Movement Good............................................ Go to Test 31
2.) Choke does not move........................................... Go to Paragraph ”B”
B.) Inspect the Choke Assembly and Linkage for binding caused by im­
proper choke support alignment, dirt, etcJ Push the Choke back and
forth with your finger - no mechanical binding or sticking should be
observed.
RESULTS; 1.) Choke is Binding.........................................Adjust or clean choke linkage
Choke moves freely............................Go to Paragraph ”C” •
C.) Loosen the two solenoid adjusting screws. Adjust solenoid axial
movement so that, with the carburetor choke valve closed, the choke
solenoid plunger is bottomed. Tighten the two adjusting screws, and
check again for correct choke action.
RESULTS; 1.) Solenoid pulls in normally...................................................Go to Test 31
2.) Solenoid does not operate normally...Go to Paragraph ”D”
D.) A small 2-wire disconnect is located adjacent to the Choke assembly.
Wire #90, from the Printed Circuit Board to the Choke Solenoid, and
Wire #14, from the Printed Circuit Board to the Choke Bi-Metal, can be
disconnected here. The following test is a check of the Printed Circuit
Board, which governs Choke pulsing action.,
CAUTION
The VOM positive (+) test probe MUST be connected to the Wire #90
pin on the FEMALE half of the disconnect. This is wire #90 from the
Printed Circuit Board. DO NOT connect the test probe to the male
half of the disconnect (wire. #90 from the Choke Solenoid). Wire #
90, from the Choke Solenoid to the male half of the disconnect, is
HOT while the engine is being cranked. Connection of the VOM to the
Wire #90 MALE disconnect pin will seriously damage the meter as
soon as the engine is cranked.
4.16 Issued 6-78