PROPULSION / ENGINE 16-69
CHANGE C2 ICON A5 / MAINTENANCE MANUAL
4. Remove any plugs from the radiator connections, then connect the two coolant hoses to the radi-
ator and tighten their hose clamps.
5. Connect the two hoses at the lower side of the oil thermostat, using a 13/16 wrench to hold the
union fitting in the thermostat and a 7/8 wrench to turn the B-nut. The forward hose runs aft to
the oil pump. The aft hose connects to the top of the oil tank. Torque the B-nuts to 200±50 in-lb
f
.
6. Connect the one ground and two power wires to the starter solenoid.
7. Install the ICN1002 induction air hose by flexing it onto the throttle valve and plenum fitting.
Tighten its hose clamps.
8. Replenish and bleed the cooling system. (See “Engine Oil Check and Replenish” on page 16-77.)
9. Purge the oil system per the procedure in the Rotax 912iS Installation Manual.
VERIFICATION METHOD:
The procedure is complete when the coolant radiator is installed and the oil system can be purged per
the procedure in the Rotax 912iS Installation Manual.
RELATED INFORMATION:
"Engine Oil Check and Replenish" on page 16-77
16.1.8 Oil System
16.1.8.1 Oil System Description
The oil system in the A5 is a dry sump forced lubrication system that ensures proper lubrication of
dynamic engine components. Starting at the Rotax oil tank, oil travels to the oil thermostat and then to
the oil cooler. From the oil cooler, the oil is sucked to the bottom of the engine by the oil pump. The oil
is then filtered and sent throughout the engine. The oil return line sends the oil back from the bottom
of the crankcase to the oil tank—specifically, against the oil tank wall in a swirling motion to prevent air
from mixing with the oil. The oil dipstick is located beneath the oil tank cap. The purge hose at the top
of the oil tank is used for ventilation and is routed in a continuous decline. The Curtis valve is used to
drain the oil. See “Oil System Diagram/Schematic” on page 16-70.
CAUTION: Allow the engine to cool down before working on the oil system.
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