BRP-Rotax
MAINTENANCE MANUAL LINE
LEAKAGE CHECK
General note
ATTENTION
Leaking connections can lead to engine problems or engine failure!
Visual inspection of the whole engine for leaks. If leaks are visible, locate the cause and
remedy the fault.
Water pump Checking water pump for leaks.
If the leakage bore, located at the base of the ignition housing, is dripping oil (see step 4),
the oil seal on the water pump shaft may be defective and must be replaced. In the case
of coolant drips at the leakage bore (see step 4), the coolant mechanical seal must be
replaced.
NOTE
The internal rotary seal has ceramic sealing surface which is lubricated by the
cooling liquid. Therefore signs of dried coolant liquid (like discolouration,...) at the
leakage bore is normal. If a coolant leak is suspected, the following steps must be
taken:
Step
Procedure
1 Clean the engine.
2
Operate the engine until the temperatures have stabilized for a period of 5
min. (engine oil temperature between 50 ° to 70 °C (122 °- 158 °F).
3
Switch “OFF“ ignition and secure engine against unintentional operation.
Secure aircraft against unauthorized operation.
4
For a period of 1 minute after the engine has been stopped, no liquid must
drip down.
Coolant hoses Check coolant hoses and connections and fittings for leakage. Examine the surrounding
area to see if there are any leaks!
Hose clamps,
kinks
Check all hoses, particularly in the area of the hose clamps and hose connections, for po-
rosity, damage and kinks. If damage is detected, replace hose immediately.
Fuel line +
hoses
Inspect fuel lines (both steel and flex hoses), their connections and screw fasteners. Look
for scuffing marks or other damage.
ATTENTION
Avoid overtorquing the connections and fasteners. Always comply with the
specified torque!
Complete a detailed visual inspection. When checking steel fuel lines (1), pay attention to
the connection areas (2). Look for leaks and cracks.
Effectivity: 912 Series
Rev. 0
12–20–00
Page 5
January 01 2020
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