Maintenance Of The Various Systems; Fuel System; 1) Removal Of Carburetors, Carburetor Flanges, Fuel Tubes And Drip Trays; 2) Bing Constant Depression Carburetor: Check And Maintenance - Rotax 914 F Maintenance Manual

13) Maintenance of the various systems

13.1) Fuel system

Besides the maintenance work prescribed, see Chapter 12), and description of the
fuel system, Chapter 9.2), further maintenance procedures are described as follows:

13.1.1) Removal of carburetors, carburetor flanges, fuel tubes and drip trays

See Pic. 61.
For check or maintenance the carburetors have to be removed.
N NOTE:
To remove the carburetors, loosen the tube clamps E.
Remove fuel tubes R by removal of banjo screws M10 T with sealing rings
Y. Loosen clamps U of pressure tubes I on carburetor (float chamber
venting) and fuel pressure regulator t and remove tubes.
Remove spring O for carburetor suspension with suitable tool.
Now the airbox P can be withdrawn towards back from the carburetors.
N NOTE:
Remove 3-pole connector of throttle valve potentiometer.
Remove clamp q from carburetor flange w and remove carburetor by gentle
turning and swivel motion along with fuel tubes.
Withdraw aluminum spacer e 36/43/4,2 from carburetor flange and close
intake openings. Remove hose clamp r, union nut t and fuel tubes.
For disassembly of carburetor flanges w only the 2 hex. screws M8x25 with
shims have to be removed. Then the carburetor flanges Q and the drip tray
T can be removed.

13.1.2) BING constant depression carburetor: Check and maintenance

13.1.2.1) General

I ATTENTION: In principle no modification must be made on the carburetor
Before removal of the carburetors for a precise inspection, close the fuel cock
and remove the fuel feed lines, collect possibly emerging fuel and ensure
proper disposal.
I ATTENTION: To avoid contamination in the fuel system proceed with
Page Date
124 1997 02 01
Due to the drip tray Q the float chamber W cannot be
removed from carburetors installed.
If required, remove 2-pole plug connector of temperature
sensor { and/or loosen air intake hose }.
calibration. The determination of the main jet is carried out
on a dyno at 300 m (1000 ft) above Mean Sea Level.
Modification is allowed to be carried out to our specifica-
tions only by aeronautical personnel or authorized test staff.
great care and cleanliness. Put carburetor and parts re-
moved on a clean surface.
Main
914 F
Reference Modification no.
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