Kohler Command CV730 User Manual download pdf (Page 125)

8.9

Section 8

Electrical System and Components

Figure 8-8.

1. Make a line near the edge of the flywheel screen

with a marking pen or narrow tape.

2. Connect an automotive timing light to cylinder

that had good spark.

Test 4. Test the ignition modules and connections.

1. Remove the blower housing from the engine.

Inspect the wiring for any damage, cuts, bad

crimps, loose terminals or broken wires.

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. Remove one of the mounting screws from each of

the ignition modules. If the mounting screws are

black, remove them both and discard. Replace

them with part number M-561025-S. Look in the

mounting hole with a flashlight and use a small

round wire brush to remove any loose rust from

the laminations inside the mounting hole.

4. Refer to the chart on page 8.10 to identify which

ignition module(s) you have. If they are the

smaller style, check the vendor part number on

the face. All modules with vendor part numbers

MA-2, MA-2A, or MA-2B (Kohler Part No.

24 584 03) should be replaced with 24 584 11 or

24 584 15-S. For small modules with vendor

numbers MA-2C or MA-2D (Kohler Part No.

24 584 11), or the larger style modules

(24 584 15-S and 24 584 36-S), use a digital

ohmmeter to check the resistance values and

compare them to the table following. When

testing resistance to the laminations, touch the

probe to the laminations inside the screw hole, as

some laminations have a rust preventative

coating on the surface which could alter the

resistance reading.

a. If all of the resistance values are within the

ranges specified in the table, go to step 5.

b. If any of the resistance values are not within

the ranges specified in the table,

that

module is faulty and must be replaced.

NOTE: The resistance values apply only to

modules that have been on a running

engine. New service modules may have

higher resistance until they have been

run.

Test 3. Check for timing advance.

Figure 8-9.

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 adjacent 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.

a. If the line on the screen moved away from

the line on the blower housing during

acceleration, the SAM is working properly. If

it didn’t move away, go to Test 5.

b. If you were able to check timing on both

cylinders, the lines you made on the blower

housing should be 90° apart. If they’re not,

go to Test 4.

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Kohler Command CV730 User Manual Page 125

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