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K & N
Air Filters
These reusable air filters have been produced
specifically for Rotax ultralight and homebuilt
engines. They have provisions for safety wire and
Rotax is embossed on the side cover. They have a high
air flow and can be cleaned and reoiled, and reused
when dirty.
This single tapered air filter fits all of the Bing 54
carburetors, used on the
Rotax 277377/447503/532/582/619/912 aircraft engines.
Dual Air Filters
K & N SP 2705
This dual air filter is designed to fit the Bing 54
carburetor used on the Rotax 503. Its slim design
allows for applications where room is a problem. 
K & N SP 2703
This dual air filter is designed to fit the Bing 54
carburetor used on the Rotax 532/582/618. Its slim
design allows for application where room is a problem.
Cleaning/Servicing
K & N Air Filters
Items required:-
K & N Air Filter Cleaner - normally 1 liter
bottle.
K & N Air Filter Oil - 200ml aerosol is best.
Shallow Tray
Tap the element to dislodge any large embedded
dirt, then gently brush it with a soft bristle brush. 
Add cleaning solution to the shallow tray, 3/4 the
depth of the pleats. Roll the filter in the tray,
trying to prevent dirty solution run inside the
filter. Wait for up to 5 minutes, rinse filter from
inside with water from the tap. Do not use high
pressure. 
Shake of excess water & allow to dry naturally,
best overnight.
Caution:
Use only K & N air filter cleaner!
Do Not use petrol, thinners paraffin etc.
Do Not use detergents.
Do Not steam clean!
Do Not use compressed air.
Do Not use hot air guns for drying.
The use of any of the above can cause harm to the
COTTON filter media,
plus shrink and harden the rubber end caps.
Excess heat will shrink the cotton filter media. While
compressed air will blow holes in the element.
- After air filter is completely dry, always
re-oil before using. If using K&N aerosol -
hold the can 3ins away & spray oil down into
each pleat with one pass per pleat. Do Not go
"round & around" WAIT 20 minutes for
oil to spread. The white gauze should appear red,
have no "white spots" and be drip less.
- If using K&N squeeze bottle - squeeze
K&N air filter oil down into the bottom and
along each pleat - only one pass per pleat. Let
oil wick into cotton for 20 minutes. Re-oil any
white spots still showing.
Caution:
Never use any oil other than RED K&N AIR
FILTER OIL.
Never use a K&N air filter without oil. (The
filter will not stop the dirt without the oil.)
K&N air filter oil is a compound of mineral
and animal oil blended with special polymers to
form a very efficient tack barrier. Red dye is
added to show just where you have applied the oil.
Eventually the red color will fade but the oil
will remain and will filter the air.
NOTES:
Service air filter every 6 months or 50 hours,
- more frequently in dirty conditions.
Always tighten the clamp securely. Also safety
wire your K&N Filter to the Carburetor.
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