O.S. Engines 32SX - Manual (Page 24)

CARBURETOR CLEANLINESS ENGINE CARE AND MAINTENANCE
At the end of each operating session, drain out any
fuel that may remain in the fuel tank.
Next, energize the glowplug and try to restart the
engine to burn off any fuel that may remain inside
the engine. Repeat this procedure until the engine
fails to fire. Remove the glowplug and eject any re-
sidue by rotating the engine with an electric starter
for 4 to 5 seconds while the engine is still warm.
Finally, inject some after-run oil into the engine.
Rotate the engine a few times by hand, to make
sure that it is free, and then with an electric starter
for 4 to 5 seconds to distribute the oil to all the
working parts.
Do not inject after-run oil into the carburetor as
this may cause the O-ring inside the carburettor
to deteriorate.
These procedures will reduce the risk of starting
difficulties and of internal corrosion after a period of
storage.
The correct functioning of the carburetor depends on
its small fuel orifices remaining clear. The minute
particles of foreign matter that are present in any fuel,
can easily partially obstruct these orifices and upset
mixture strength so that engine performance
becomes erratic and unreliable.
O.S.'Super-Filters'(large and small ) are available, as
optional extras, to deal with this problem.
One of these filters, fitted to the outlet tube inside
your refueling container, will prevent the entry of
foreign material into the fuel tank.
It is also recommended that a good in-line filter be
installed between the tank and needle-valve.
Do not forget to clean the filters regularly to remove
dirt and lint that accumulate on the filter screen.
Also, clean the carburetor itself occasionally.
Note:
1.
2.
3.
23