Guardian Technologies 4451 & 4986 Manual De Usuario

Page 53

Page 53

5. Set voltmeter to measure DC voltage.

6. Remove  Wire  15  from  the  Start-Run-Stop  Switch  (SW1).

Connect the positive  meter test lead to Wire 15. Connect the
negative meter test lead to frame ground. 12 VDC should be
measured.

RESULTS:
Repair or replace any wiring that did not have continu-

ity. 
If  voltage  was  not  measured  in  Step  6  repair  wiring 

between  the  Starter  Contactor  Relay  (SCR)  and  the 

Start-Run-Stop Switch (SW1). 
If all steps passed repair or replace Wire 16 between 

the  Starter  Contactor  (SC)  and  the  Starter  contactor 

Relay (SCR).

PROCEDURE:
A  commercially  available  spark  tester  may  be  used 

to  test  the  engine  ignition  system.  One  can  also  be 

purchased  from  Generac  Power  Systems  (Part  No. 

0C5969).
1. Disconnect a high tension lead from a spark plug.

2. Attach the high tension lead to the spark tester terminal.

3. Ground  the  spark  tester  clamp  by  attaching  to  the  cylinder

head (see Figure 6-37).

4. Crank the engine rapidly. Engine must be cranking at 350 rpm

or  more.  If  spark  jumps  the  tester  gap,  you  may  assume  the
ignition system is working properly. Repeat on remaining cylin-
der spark plug.

5. If spark jumps the tester gap intermittently, the problem may be

in the Ignition Magneto.

RESULTS:
Refer back to the Flow Chart

PROCEDURE:
Remove  spark  plugs.  Clean  with  a  commercial  sol-

vent.  DO  NOT  BLAST  CLEAN  SPARK  PLUGS. 

Replace  spark  plugs  if  badly  fouled,  if  ceramic  is 

cracked,  or  if  badly  worn  or  damaged.  Set  gap  to 

0.040 inch (1.016 mm). Use a Champion RC14YC (or 

equivalent) replacement spark plug.

SET PLUG GAP AT 0.040 inch

(1.016 mm)

RESULTS:
1. Clean and regap or replace sparks plug as necessary.

2. Refer back to the Flow Chart.