GGP Mountfield SV-150, Руководство по ремонту, Страница: 11 / 35

Fuel filter clogged
Ignition problems
Insufficient or no current to the
spark plug
Lawnmower problems
The throttle cable is not well
adjusted
Carburation problems
Carburettor dirty
The governor malfunctions or
there is a problem with the tie
rods
Insufficient pressure
chamber, the engine stops. After a few minutes,
the float chamber fills up and the engine is able
to restart, only to stop soon after.
Inside the tank, the filter has a metal mesh which
can clog up with dirt or with a film of old fuel.
Poor connections of the electrical cables or mal-
functioning parts can cause the lawnmower to
function irregularly.
The throttle’s “FAST” position may not corre-
spond with the carburettor’s “FAST” position,
reducing the flow of mixture and hence the
power.
If the jet and pipes inside the carburettor clog
up, the petrol supply drops and the engine
becomes less efficient.
The pneumatic governor fin disc is broken or
does not move freely and therefore fails to work
the carburettor correctly.
The bent or warped governor rods are bent,
deformed or do not move freely, preventing the
governor from reaching its end-of-stroke.
The piston rings can wear out due to the pas-
sage of dust or overheating caused by the lack
of oil.
The cylinder head screws can loosen causing
the gasket to burn.
Empty and clean the
tank
[ 6.1.B]
Check the spark plug
and the efficiency of
the ignition system
with the spark test
[
6.6.A]
Check and/or adjust
the throttle cable [
6.5.A]
Check and clean the
carburettor
[ 6.4.A]
Check the entire gov-
ernor system
[ 6.5]
Replace the engine
[ 6.9.C]
Dismount the cylinder
head and replace the
gasket
[ 6.9.A]
01/2005
SV 150
5.1 .
0
TROUBLESHOOTING
3 / 5
WORKSHOP MANUAL
page
from
2004
to
••••
E) The engine is inefficient (insufficient power)
Probable cause Comment Solution
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