close a minimum of 45’ at an ambient temperature of
about 75’F (24’C). The plate will close more at lower tem-
peratures. The choke plate should open when the switch is
released.
, , 4; During cranking the choke will remain closed as long as
t the start-stop switch is held in the start position.
5. If the choke does not function properly, refer to Choke
Troubleshooting, Table 7-l.
7-l .3. Testing - Choke Solenoid (3.5,4.5kW Single)
1. Disconnect leads from the solenoid tabs (Figure 7-l).
2. Check the resistance of the solenoid by connecting an
ohmmeter or multimeter across the solenoid tabs. Sole-
noid resistance should be approximately 23 ohms or
higher.
7-1.4. Testing - Choke Heater (3.5,4.5kW Single)
1. Remove the lead from the heater terminal.
2. Check heater resistance. Connect one lead of an ohm-
meter or multimeter to the heater terminal. Connect the
other lead to the carburetor body (ground).
3. The resistance should read at least three ohms. If not,
replace the choke.
7-1.5. Replacement and Adiustment.
NOTE
When installing the choke, make sure the choke
plate arm goes under the choke lever.
1. Position the choke with the two mounting screws
slightly loose.
2. Push the choke unit all the way down, then, keeping
slight pressure on it, move the chokeplate (in carburetor)
into the full open position allowing the choke unit to rise.
3. Rotate the choke unit clockwise (viewed from choke
side) with a slight pressure. Continue to rotate the choke
until it can no longer be rotated without closing the choke
plate. (An internal spring will be wound up in the last 5 to
15 degrees of rotation before internal stop is reached).
4. When the choke plate is full open, tighten the bracket
screws and install the three leads.
5. Check choke function by removing the spark plug lead
and cranking the engine.
The choke plate should close
a minimum of 45’ at a temperature of about 75’F (24’C).
The plate will close more at lower temperatures. The choke
will remain closed as long as the start-stop switch is held in
the start position.
PROBLEM
Choke won’t close when
cranking.
CAUSES
SOLUTIONS
1. Faulty lead wires or terminals.
1. Change lead wires or replace choke.
2. Air cleaner gasket interference with 2. Reposition flat of gasket to provide
choke shaft lever. (4.5kW only.)
clearance for choke shaft lever.
3. Faulty solenoid.
3. Test solenoid.
4. Faulty controller or ground
4. Replace lead to controller with
in controller.
a jumper wire to ground. If choke
functions properly check con-
troller.
5. Choke lever lacks sufficient travel
5. Manually move the choke lever until
or smooth movement.
the choke plate is fully closed. Re-
place the choke unit if it does not
move freely.
Choke will not fully open.
1. Choke spring not properly
adjusted.
2. Choke shaft fails to move freely.
3. Faulty choke adjustment.
4. Faulty heater.
1. Remove spring retainer and with
choke wide open wind up spring l/2
turn, replace spring retainer.
2. Replace choke shaft.
3. Adjust choke.
4. Test heater resistance.
Table 7-1. Troubleshooting Choke (3.5KW, 4.5KW)
7-2
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