Kohler Aegis LH775 Service Manual page 31

Checking Initial Adjustment
1. Unsnap plastic linkage bushing attaching throttle
linkage to governor lever. Unhook damper spring
from lever, separate linkage from bushing, and
remove bushing from lever. Mark hole position and
unhook governor spring from governor lever.
2. Pivot throttle shaft and plate into Full Throttle
position, so tang of throttle shaft plate is against
manifold casting. Temporarily clamp in this position.
3. Rotate governor lever and shaft counterclockwise
until it stops. Use only enough pressure to hold it in
that position.
4. Check how end of throttle linkage aligns with
bushing hole in governor lever. It should fall in center
of hole. If it doesn't, perform adjustment procedure
as follows.
Setting Initial Adjustment
1. Check split where clamping screw goes through
governor lever. There should be a gap of at least
1/32". If tips are touching and there is no gap
present, lever should be replaced. If not already
installed, position governor lever on cross shaft, but
leave clamping screw loose.
TROUBLESHOOTING GUIDE
Engine Starts Hard or
Fails to Start When
Cold
Engine Starts Hard or
Fails to Start When
Hot
66 690 07 Rev. --
Fuel pump not running.
Engine temp sensor faulty.
Incorrect fuel pressure.
TPS faulty.
TPS offset incorrect.
Old/stale fuel.
Low system voltage.
Speed sensor loose or faulty.
Faulty injectors.
Faulty coils.
Faulty spark plugs.
Fuel pressure low.
Fuel pump not running.
Engine temp sensor faulty.
Insuffi cient fuel delivery.
TPS faulty.
TPS offset incorrect.
Speed sensor loose or faulty.
Faulty injectors.
Faulty spark plugs.
KohlerEngines.com
2. Follow instructions in Step 2 of Checking Initial
Adjustment, then reattach throttle linkage to
governor lever with bushing clip. It is not necessary
to reattach damper or governor springs at this time.
3. Insert a nail into hole in top of cross shaft. Using light
pressure, rotate governor shaft counterclockwise as
far as it will turn, then torque hex nut on clamping
screw to 6.8 N·m (60 in. lb.). Make sure that
governor arm has not twisted up or down after nut
has been tightened.
4. Verify that governor has been set correctly. With
linkage still retained in Full Throttle position (Step 2),
unsnap bushing clip, separate linkage from bushing,
and remove bushing from lever. Follow Steps 3 and
4 in Checking Initial Adjustment.
5. Reconnect dampening spring into its governor lever
hole from bottom. Reinstall bushing and reattach
throttle linkage. Reattach governor spring in marked
hole.
6. Start engine and allow it to fully warm up and
establish closed loop operation (approximately 5-10
min.). Check speed settings and adjust as
necessary, fi rst low idle speed, and then high speed
setting.
EFI System
31