d05785.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 i Series
Edition 1/Rev. 2
75-00-00
Page 18
January 01/2014
Flow rate
The flow rate in the coolant circuit is approx. 60 l/min (15.85 USgal/min.) at
5800 rpm. At full throttle, an approximate value of around 0.75 m
3
/s
(28.59 cu.ft/sec) can be assumed for the required cooling air flow.
Flow resistance The flow resistance of the coolant in the optional ROTAX radiator is cor-
rectly adjusted for the cooling system.
If using other radiators, check the flow rate and cooling capacity.
Installation of
the radiator
No provision has been made for attachment of the radiator(s) on the
engine (rubber mounts are recommended).
4.1) Coolant capacity
4 cylinder heads......................................... 560 cm
3
(0.02 cu.ft)
Coolant pump............................................. 100 cm
3
(0.004 cu.ft)
Expansion tank .......................................... 250 cm
3
(0.008 cu.ft)
2 m coolant hose (inner Ø 18 mm) ............. 500 cm
3
(0.018 cu.ft)
Total coolant quantity for engine................ approx. 1.5 l (0.4 USgal)
The radiator must be installed without distortion or
stress and be free of vibrations. If a GENUINE
ROTAX radiator is not being installed, ensure suffi-
cient cooling capacity.
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