5B.23
Section 5B
EFI Fuel System
Figure 5B-33. Idle Speed Screw Details.
Initial Governor Adjustment
The initial governor adjustment is especially critical on
EFI engines because of the accuracy and sensitivity of
the electronic control system. Incorrect adjustment can
result in overspeed, loss of power, lack of response, or
inadequate load compensation. If you encounter any of
these symptoms and suspect them to be related to the
governor setting, the following should be used to check
and/or adjust the governor and throttle linkage.
If the governor/throttle components are all intact, but
you think there may be a problem with the adjustment,
follow Procedure A to check the setting. If the governor
lever was loosened or removed, go immediately to
Procedure B to perform the initial adjustment.
A. Checking the Initial Adjustment
1. Unsnap the plastic linkage bushing attaching the
throttle linkage to the governor lever. See Figure
5B-34. Unhook the damper spring from the lever,
separate the linkage from the bushing, and
remove the bushing from the lever. Mark the hole
position and unhook the governor spring from the
governor lever.
Figure 5B-35. Throttle Details.
a. On engines with a stop screw, pivot the throttle
shaft and plate into the “Full Throttle” position,
so the tang of the throttle shaft plate is against
the end of the high-speed stop screw. See
Figure 5B-35. Temporarily clamp in this
position.
Idle Speed
Screw
Figure 5B-34. Throttle Linkage/Governor Lever
Connection.
2. Check if the engine has a high-speed throttle stop
screw installed in the manifold casting boss. See
Figure 5B-35.
High-Speed
Throttle Stop
Screw
Linkage
Bushing
Throttle
Linkage
Damper
Spring
Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
www.mymowerparts.com
