SV200 R200
4/2007© by GLOBAL GARDEN PRODUCTS
Insufficient pressure
Environmental problems
The engine is used at a high
altitude
Carburation problems
Air seeps into the carburettor
The governor malfunctions or
there is a problem with the
rods
Starting problems
The coil air gap has been
poorly adjusted
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.
Poor compression could be caused by the burn-
ing or wear of the valves or seats, or by an incor-
rectly adjusted gap.
The rarefaction of air in the mountains causes a
drop in power of approx. 10-12% every 1000
metres of altitude.
If air seeps through the gaskets, it can cause the
lawnmower to function poorly and make it diffi-
cult to maintain the minimum speed (2200-2400
rpm).
The governor lever transfers the movement of
the internal counterweight device to the carbu-
rettor control rods; if the lever is not properly in
phase with the pin it will not operate suitably on
the rods.
The governor rods are bent, deformed or do not
move freely, preventing the governor from reach-
ing its end-of-stroke.
The air gap adjustment between the flywheel
and coil must be 0.25-0.40 mm.
Replace the rings
[
6.10.C]
Dismount the cylinder
head and replace the
gasket [
6.9.A]
Check the state of
wear of the valves,
grind the seats and
adjust the gap
[
6.9.D]
Suggest to the client
that the effort of the
machine is adapted to
the reduced power
available; if the
lawnmower is used
permanently at
altitudes above
1200-1500 metres,
the carburation can be
adjusted to compen-
sate for the reduced
oxygen supply
[
6.4.E]
Replace the carburet-
tor gaskets [
6.4.A]
Check the entire gov-
ernor system [
6.5]
Adjust the air gap
[
6.6.B] and if the
problem persists,
replace the coil
[
6.6.C]
5.1.1
TROUBLESHOOTING
5 / 7
SERVICE MANUAL
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from
2007 to ••••
F) The engine runs irregularly
Probable cause Comment Solution
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