Care And Maintenance - O.S. engine FS-56A Owner's Instruction Manual

REALIGNMENT OF MIXTURE CONTROL NOZZLE
In the course of making carburetor
adjustments, it is just possible that the
Mixture Control Nozzle may be inadvertently
screwed in or out too far and thereby moved
beyond its effective adjustment range.
Rotate the Mixture Control
Nozzle until its slotted
head is flush with the
carburetor body. This is
the basic position.
Mixture Control Nozzle
Carburetor Body
VALVE ADJUSTING
Valve clearances are correctly set before
any O.S. engine leaves the factory and, in
normal use, will seldom require adjustment.
However, if, after a considerable amount of
running time, a loss of power is detected, or
if he engine has been disassembled for
repair, these clearances should be checked
and reset as necessary.
For checking and adjusting the valve
clearances, a VALVE ADJUSTING TOOL
KIT is available as an optional accessory.
The kit comes in a plastic case and includes:
(Code No.72200060)
• Feeler gauge 0.04mm
• Feeler gauge 0.1mm
• Hex. key 1.5mm
• Wrench 5mm
CARBURETOR CARE & MAINTENANCE
If you experience difficulty in obtaining a
consistent mixture setting it could be due to
foreign debris in the carburetor. Carefully
disassemble the carburetor and wash in
methanol. Do not use gasoline or kerosene
that can effect the silicone rubber "O" rings.
Debris tends to accumulate in
this area
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CARE AND MAINTENANCE

Please pay attention to the matters
described below to ensure that your engine
serves you well in regard to performance,
reliability and long life.
As previously mentioned, it is vitally important
to avoid operating the engine in conditions
where dust, disturbed by the propeller, may
be deposited on the engine and enter its
working parts.
Remember to keep your fuel container
closed to prevent foreign matter from
contaminating the fuel.
Install a fuel filter to prevent dirt and foreign
matter in the fuel container from entering the
fuel tank. O.S. Super Filters (L) and (S) are
available as optional extras.
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