Rotax 912 Series Service Manual

Effectivity 912/914 Series
Edition 1 / Rev. 0
page 1
May 01/2007
d02623
73-00-00
BRP-Rotax
Maintenance Manual
SECTION 73
FUEL SYSTEM
1) Table of contents
SECTION 73
FUEL SYSTEM
1) Table of contents .................................................................................... 73-00-00 / 1
2) Systems description ...............................................................................73-00-00 / 3
2.1) Fuel system (on 912 Series) .........................................................73-00-00 / 3
2.2) Fuel system (on 914 Series) .........................................................73-00-00 / 5
2.3) Fuel filter ....................................................................................... 73-00-00 / 7
2.4) Fuel pump (on 912 Series)............................................................ 73-00-00 / 7
2.5) Fuel pump (on 914 Series)............................................................ 73-00-00 / 7
2.6) Fuel pressure regulator (only on 914 Series) ................................73-00-00 / 8
2.7) Pressure connecting lines (only on 914 Series) ............................73-00-00 / 10
2.8) BING constant depression carburetor type 64-3 ..........................73-00-00 / 12
2.9) Handling of fuel .............................................................................73-00-00 / 15
2.10) Connections for instrumentation ...................................................73-00-00 / 16
2.10.1) Airbox air temperature display (only on 914 Series) .............73-00-00 / 16
2.10.2) Boost pressure display..........................................................73-00-00 / 16
2.11) Carb heat system and winter operation ........................................73-00-00 / 16
3) Maintenance ...........................................................................................73-00-00 / 17
3.1) Disassembling carburetors, carburetor sockets, fuel lines
and drip tray (on the 912 Series) ..................................................73-00-00 / 17
3.2) Disassembling carburetors, carburetor sockets, fuel lines
and drip tray (on the 914 Series) ..................................................73-00-00 / 19
3.3) BING-constant depression carburetor inspection ........................73-00-00 / 21
3.3.1) General note .........................................................................73-00-00 / 21
3.3.2) Float needle valve leakage test ...........................................73-00-00 / 22
3.3.3) Individual components of the carburetor (on the 912 Series)73-00-00 / 23
3.3.4) Individual components of the carburetor (on the 914 Series)73-00-00 / 24
3.3.5) Diaphragm ............................................................................73-00-00 / 25
3.3.6) Jet needle .............................................................................73-00-00 / 25
3.3.7) Float chamber, floats ............................................................ 73-00-00 / 27
3.3.8) Float brackets .......................................................................73-00-00 / 28
3.3.9) Carburetor jets ......................................................................73-00-00 / 29
3.3.10) Float needle valve inspection...............................................73-00-00 / 30

Rotax 912 Series Specifications

General

Redline	5800 rpm
TBO	2000 hours
Displacement	1211 cc
Bore	79.5 mm
Stroke	61 mm
Power Output	80 hp (59.6 kW)
Compression Ratio	9.0:1
Fuel Type	Avgas 100LL
Ignition System	Dual electronic ignition
Fuel System	Fuel Injected
Oil System	Dry sump
Engine Type	4-cylinder, horizontally opposed, 4-stroke