Kohler ECV940 Service Manual page 168

Reassembly
Testing Engine
ETB ECV EFI
Engines equipped with an electronic throttle body (ETB)
cannot be tested on a test stand or bench. Install engine
in application.
Connect Stator Wires and Install High Output
Charging System Terminal Block Cover
NOTE: When high output charging system rectifi er-
regulator is supplied by Kohler, but installed by
OEM in application, you must connect stator
wires and install terminal block cover after
installing engine in application. Refer to
equipment manual for details on securing
regulator in application and connecting OEM
supplied B+ and ground wiring harnesses.
C
B
A
A Torx Screw
C Rectifi er-Regulator
OEM Supplied
E Ground Wire
Harness
1. Torque nuts to 4.0 N·m (35 in. lb.).
2. Install terminal block cover and secure with Torx
screws. Torque screws to 2.8 N·m (25 in. lb.).
168
F
E
D
Terminal Block
B
Cover
OEM Supplied B+
Wiring Harness
D
with Charging
Fuse
F Stator Wires
KohlerEngines.com
ECV EFI
It is recommended engine be operated on a test stand or
bench prior to installation in equipment.
1. Set engine up on a test stand. Install an oil pressure
gauge. Start engine and check to be certain oil
pressure (20 psi or more) is present. Run engine at
idle for 2-3 minutes, then 5-6 minutes more between
idle and midrange.
2. Adjust idle speed screw located on throttle body as
necessary. Standard idle speed setting for EFI
engines is 1500 RPM, but certain applications might
require a diff erent setting.
3. Mechanical Governor: Adjust governed idle and
high speed (RPM) to required settings. Make sure
maximum engine speed does not exceed 3900 RPM
(no load).
Electronic Governor: Identify design on engine
being serviced, refer to Electronic Governor System
Designs on pages 89-90, and follow appropriate
procedure below.
Engines with Original Design or Field Installed
Updated Design: Attach 12 volt jumper wire to
speed control input red wire with yellow tracer.
Engine speed should increase to high. If engine
speed does not increase, refer to Governor section
for proper troubleshooting and diagnostics. Remove
jumper wire and engine speed should decrease and
return to idle speed.
Engines with New Updated Design: Using E-Gov
Jumper Test Tool (refer to Tools and Aids) is
recommended to perform 12 volt power test. Using a
jumper wire (technician supplied) supply 12 volts (+)
to red w/yellow tracer bullet connector of tool.
Engine speed should increase to high with 12 volt
jumper wire in place. If engine speed does not
increase, refer to Governor section for proper
troubleshooting and diagnostics. Remove jumper 12
volt (+) wire from bullet connector and engine speed
should decrease and return to idle speed.
62 690 05 Rev. H