Generac Power Systems TXP - Manual (Page 35)

Ad just Jets: Turn Needle Valve
clockwise until it just closes -
DO NOT TURN IN TOO FAR, OR JET
MAY BE DAMAGED. Then open needle
valve
l\
turns (counterclockwise).
Close Idle Valve in same manner,
then open 1^ turns. This initial
adjustment will permit the engine
to be started and warmed up.
TEST 23 -
CARBURETOR
With engine running, hold the throttle lever against the Idle Stop. Set
the Idle Speed Adjusting Screw to obtain 1400 rpm. Turn Idle Valve SLOW­
LY clockwise to obtain 1400 rpm, 93 volts AC, or 46 Hz. Then turn Idle
Valve SLOWLY clockwise (lean mixture) until engine misses or engine
speed slows. Finally, turn Idle Valve one-half turn counterclockwise.
Hold throttle lever against idle
stop and turn Idle Speed Adjust­
ing Screw to obtain 900 rpm (30
Hertz or 60 Volts a-c). Then bend
Governed Idle Tab (see illustrat­
ion at right) to obtain 1400 rpm
(93 Volts a-c or 46 Hertz).___________________
NOTE
Governed idle must be adjusted
for proper operation. The smaller
spring keeps the engine on govern
nor, even at idle speed. Idle
speed should not be lower then
1100 rpm, 73 volts or 37 Hz.
Release throttle lever and let'engine accelerate to governed speed.
Apply a load to the alternator, between'3000 and 4500 watts. Turn
Needle valve SLOWLY clockwise (lean mixture) until voltage reading
starts to drop off. Then turn Needle Valve counterclockwise until
the highest voltage reading is obtained. When the highest voltage
is obtained, turn the Needle Valve counterclockwise an additional
1/8
of a turn.
Check Float Valve and Seat; Refer to engine section of this Manual
for procedures. Inspect float valve and its seat for damage, dirt
or wear.
Check Float Level; Refer to engine section of this Manual for pro­
cedures .
4.14
Issued, 3-78