Specifications

AIR INJECTION SYSTEM
valve and vacuum pipe. Blow through switching valve from vacuum
sensing tube "B". See Fig. 2. Air should pass through valve and
escape from port "C".
2) Disconnect electrical connector from switching solenoid
valve and connect battery power to terminals on valve. Blow through
hose again. Air should pass through valve and escape through port "A"
of the valve. If valve does not respond as described, replace
switching solenoid valve.
SWITCHING SOLENOID VALVE SIGNAL CHECK
1) Warm engine to normal operating temperature. Connect
tachometer to engine. Disconnect the connector from the throttle
sensor and connect a jumper wire to terminals "A" and "C" of the
connector. Disconnect the vacuum sensing tube (from switching solenoid
valve to pipe) at the pipe. See Fig. 3.
2) Place a finger over the vacuum sensing tube opening and
make sure air is sucked into the tube. Gradually increase the engine
speed and make sure that air is not sucked into the tube when engine
RPM is 1000-2000 RPM or more.
3) Disconnect the connector from the number 1 water
temperature switch and connect a jumper wire to both terminals of the
connector. Pull the choke knob out about .6" (15 mm). Increase the
engine speed and make sure that air is sucked into the tube at any
engine speed.
4) Disconnect the jumper wire from water temperature switch
connector and reconnect the connector to water temperature switch.
Disconnect the jumper wire from terminals "A" and "C" and connect the
connector to the throttle sensor.
5) Gradually increase the engine speed and make sure air is
sucked into tube at any engine speed. Air should not be sucked into
the tube if the engine is accelerated quickly. Reconnect the vacuum
sensing tube to pipe.
WATER TEMPERATURE SWITCHES
1) Remove number 1 switch from water pump. Remove number 2
switch from radiator lower tank. Place switch in water with a
thermometer and heat water gradually. On the number 1 switch, check
the temperature at which continuity does not exist between both
terminals in the connector.
2) On the number 1 switch, check the temperature at which
continuity exits between both terminals in the connector. For the
number 1 switch, there should be no continuity at temperatures above
146-169
ø
F (63.5-76.5
ø
C). For the number 2 switch, continuity should
exist temperatures above 52-66
ø
F (12-18
ø
C).
CHOKE SWITCH & MAGNET
Disconnect the connector from the choke switch. Check the
continuity between the numbered terminals in the connector using an
ohmmeter. With choke knob pulled out .3-.5" (8-12 mm), there should be
continuity between terminals 3 and 7 if switch is okay. With knob in
any position, there should be continuity between terminals 6 and 8 if
choke magnet is okay.