Generac Power Systems 16 kW NG User Manual

Page 136

RESULTS:

1.  If no spark or very weak spark occurs, go to Test 73.
2.  If sparking occurs but engine still won’t start, go to Test 71.
3.  When  checking  for  engine  miss,  if  sparking  occurs  at 

regular intervals but engine miss continues, go to Test 20.

4.  When checking for engine miss, if a spark miss is readily 

apparent, go to Test 74.

DISCUSSION:
If the engine will not start and Test 70 indicated good 
ignition spark, perhaps the spark plug(s) are fouled or 
otherwise damaged. Engine miss may also be caused 
by defective spark plug(s).

PROCEDURE:

1.  Remove spark plugs and clean with a penknife or use a 

wire brush and solvent.

2.  Replace  any  spark  plug  having  burned  electrodes  or 

cracked porcelain.

3.  Set gap on new or used spark plugs as follows:

410 cc

8 kW

0.030 inch

RC14YC

530 cc

10 kW

0.030 inch

BPR6HS

990 cc

10-17 kW 0.040 inch

RC14YC

999 cc

20 kW

0.030 inch

RC12YC

RESULTS:

1.  Clean, re-gap or replace spark plugs as necessary.
2.  If spark plugs are good, refer back to flow chart.

NORMAL

MISFIRES

PRE-IGNITION

DETONATION

GENERAL:
Most  engine  problems  may  be  classified  as  one  or  a 
combination of the following:

•  Will not start
•  Starts hard
•  Lack of power
•  Runs rough
•  Vibration
•  Overheating
•  High oil consumption

DC CONTROL