W A R N I N G
Be sure all parts/components are clean and dry of fuel before airflight:
an explosion or ignition might result from residual solvents.
3.3.1 Flush all parts/components with hot, flowing tap water to remove loose
dirt particles. Wash each piece separately with a hot water and non-abrasive soap
solution. Rub or gently scrub the various surfaces as described in the following
steps until any dirt or dirt film is thoroughly cleaned from the piece.
3.3.2 Vigorously scrub smooth metal surfaces (DO NOT scrub filter support
screens) with a sponge or soft bristle brush. Be systematic to ensure cleaning of
entire surface area.
3.3.3 On threaded parts, use a stiff bristle brush to remove matter sticking to the
bottoms of the threads.
3.3.4 O-ring grooves are best cleaned by using a cotton-tip swab, rubbing
systematically along the entire length of the groove.
3.3.5 wash all O-rings and gaskets in the same soapy solution being careful not to
scratch their surfaces. If adherent material strongly resists removal, replace the
part rather than damaging the piece from scrubbing too hard.
As a general rule, do not use special solvents to remove stains or stubborn soil. If
proper cleaning is performed routinely (after each use) stains and soil will be
minimized. Remember that the harmful effects of overzealous cleaning
techniques can far outweigh the effect of the stain on the function of the part or
3.3.6 After cleaning, thoroughly rinse all components in hot, flowing water then
rinse again with cold water. It is always good practice -- and essential in critical
applications -- to prefilter the final rinse water for removal of any entrained dirt.
In hard-water areas, distilled or de-ionized water might be needed for the final
rinse to remove any deposits.
3.3.7 After the final rinse, re-inspect O-rings and gaskets for cracks or other
damage. Replace them if damaged.