Kohler Courage SV710-740 Service Manual page 64

2. Crank the engine over, establishing a minimum
of 550-600 RPM, and observe tester(s) for spark.
3. Repeat the spark test on the opposite cylinder if
cylinders are being tested individually.
a. If both cylinders have good spark but the
engine runs poorly, or existing plug(s)
condition or appearance is questionable,
install new spark plugs gapped at
0.76 mm (0.030 in.), and retest engine
performance. If problem persists, go to Test 3.
b. If one cylinder had good spark but the other
cylinder had no spark, or intermittent spark,
go to Test 4.
c. If there was spark on both cylinders but
power is suspect, go to Test 3.
1. Make a line near the edge of the flywheel screen
with a marking pen or narrow tape. See Figure
7-7.
2. Connect an automotive timing light to cylinder
that had good spark.
3. Run the engine at idle and use the timing light
beam to locate the line on the screen. Draw a line
on the blower housing next to the line on the
screen. Accelerate to full throttle and watch for
movement of the line on the screen relative to the
line on the blower housing. If both cylinders had
good spark, repeat the test on the other cylinder.
See Figure 7-8.
a. If the line on the screen moved away from
the line on the blower housing during
acceleration, the DSAI ignition module for the
cylinder being tested is working properly. If it
didn't move away, go to Test 4.
b. If you were able to check timing on both
cylinders, the lines you made on the blower
housing should be 90° apart. If not, go to Test 4.
1. Remove the blower housing from the engine.
Inspect the wiring for any damage, cuts, bad
crimps, loose terminals, or broken wires. Check
that connections are oriented properly on
terminals of modules.
2. Disconnect the leads from the ignition module(s)
and clean all of the terminals (male and female)
with aerosol electrical contact cleaner to remove
any old dielectric compound, dark residue, dirt,
or contamination. Disconnect the spark plug leads
from the spark plugs.
3. Using a multi-meter, check that a proper ground is
established between the ground (black) lead of the
DSAI module (closest to spark plug lead), and a
known good ground location on the engine.