Edition 02.97 Power Mower 5400 43
5. Maintenance: 4-Stroke-Engine
EH 25 D
Governor
spring in
hole 3
EH 25 D
1 Idling mix control screw
2 Idling speed control screw
3 Idling speed air jet
Cleaning Cylinder Head
After every 400 hours of operation take
off cylinder head and remove carbon de-
posits on cylinder, cylinder head, pis-
ton crown and valves with a steel brush.
Afterwards, clean with soft brush. Re-
new head gasket and reassemble to cyl-
inder head. Tighten cylinder head
screws in turn. Tighten with a torque of
26 Nm. For this purpose, contact your
professional AGRIA workshop.
Re-adjusting Valve Lash
After every 400 hours of operation, re-
adjust valve lash. Intake and outlet valve
are at 0.1mm when the engine is cold.
For this purpose, contact your pro-
fessional AGRIA workshop.
Idling Speed
Always ensure that idling engine speed
is adjusted correctly. At low speeds and
with the speed control lever at stop in
neutral, the engine is supposed to run
smoothly and without run-out.
Adjust the engine speed while the en-
gine is still warm from operation. For this
purpose, re-adjust the speed control
screw (2) and the mix control screw (1)
for idling speed. Then turn the attach-
ment or adjusting screw to adjust the
throttle cable for no play. (For idling
speeds refer to “Specifications”).
We recommend to have the necessary
adjustments done by your AGRIA work-
shop.
Governor
For correct functioning of the governor
on the engine and for adjustment of up-
per idle speed ranges, the governor
spring must be in the appropriate place,
see fig.
W
Any changes to the position
of the spring cause warranty
and type approval to become
void.
Keep governor spring, speed control le-
ver and linkages free from dirt and plant
trash at all times.
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