Exhaust System Requirements; Technical Data - Rotax 912 i Series Installation Manual

2) Exhaust system requirements

General note
2.1)

Technical data

- Average radius of exhaust manifold: at least 40 mm (1.57 in.)
- Inner diameter of manifold pipe: at least 28 mm (1.10 in.)
- Volume of damping element: approx. 5 l (1.32 USgal)
- Back pressure at maximum power: max. 0.2 bar (2.9 psi) measured in
2.2) If a GENUINE-ROTAX exhaust is not used
The four prefitted exhaust sockets with exhaust flange and lock nuts must
General note
be used.
Exhaust sockets material: X6CrNiTi 1810 (DIN 1.4541)
Tightening torque of M8 lock nuts: min. 12 Nm (8.85 ft.lb.)/max. 20 Nm
(14.75 ft.lb.)
NOTE:
Exhaust sockets
Graphic
Fig. 3
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
INSTALLATION MANUAL
Install heat shields in required areas (fuel, oil, coolant
NOTICE
WARNUNG
hoses or tubes) and/or on the electronic components.
Because of the high temperatures, provide suitable
protection against accidental contact.
Secure exhaust system by suitable means according
NOTICE
WARNUNG
to installation requirements.
each case approx. 100 mm (3.94 in.) beyond the end of the exhaust
flange)
This tolerance range ensures that the exhaust flange does
not touch the cylinder head. Always ensure that the max-
imum tightening torque is used, but do not exceed the
maximum value.
08810
78-00-00
Page 5
January 01/2012