Checking Automatic Choke Release; Checking Carburetor Heater; Hot Start Assist Cable - Mazda 1983 RX7 Service Manual

Fig. 5:

Checking Automatic Choke Release

CHECKING AUTOMATIC CHOKE RELEASE
1) With engine cold and ignition "OFF", pull choke knob out
fully and release. Knob should return automatically and freely.
Connect tachometer to engine.
2) Start engine and set engine speed at 2000 RPM with choke
knob. As engine temperature reaches range indicated in Fig. 5., choke
knob should return automatically and freely.

CHECKING CARBURETOR HEATER

1) Disconnect electrical connector from No. 1 water
temperature switch and connect jumper wire to both terminals of
connector. Connect tachometer to engine.
2) Disconnect carburetor heater electrical connector and
connect voltmeter to connector. Start engine and set engine speed at
2000 RPM with choke knob.
3) With choke knob pulled out, current should flow to
carburetor heater lead. Current should not flow to heater lead with
choke knob pushed in.
4) Connect ohmmeter between carburetor heater lead and
carburetor body. If ohmmeter shows no movement, carburetor heater is
defective and must be replaced.

HOT START ASSIST CABLE

1) Remove lock spring of hot start assist cable from cable
bracket. Slowly pull outer cable until hot start lever just touches
stop lever.
2) Check clearance between cable bracket and lock nut on
cable. See Fig. 6. Clearance should be .02-.08" (0.5-2.0 mm). Adjust
by turning lock nut, then install lock spring securely on cable.
CARBURETOR - NIKKI 4-BBL
Article Text (p. 4)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 05:52PM