Rotax 912 Series Service Manual

Effectivity 912 Series
Edition 1 / Rev. 0
page 3
May 01/2007
d02623
73-00-00
BRP-Rotax
Maintenance Manual
2) Systems description
2.1) Fuel system (on 912 Series)
See Fig. 73-1.
The fuel system comprises the following items:
- fuel tank
- coarse filter
- fine filter
- water drain cock
- fire cock
- 1 mechanical fuel pump
- 2 carburetors
- and the required fuel piping and connections
The fuel passes from the tank (1) with the coarse filter (2) via the fire cock (3),
the water drain cock (4) and the fine filter (5) to the mechanical fuel pump (6).
The latter then pumps the fuel to the two carburetors (7).
The surplus fuel passes back to the tank or to the suction side of the fuel system
via the return line (8).
◆ NOTE: The return line prevents malfunctions caused by the formation
of vapor lock. The return line must be restricted to allow
circulation of surplus fuel and air without loosing pressure.

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