Applicable to: B22 and B25 (a ll versions)
Revision 1.3 – 02/24/ 2015
Manual B – Operations
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B.9. MALFUNCTION RESOLUTION
Only qualified and trained technicians on this particular type of engine are authorized to perform
maintenance work and repairs
.
If the following collection of solutions will not solve the problem you should contact an
authorized service center.
B.9.1. Operation Malfunctions and Their Resolution
The malfunction and remedies are listed in order of frequency.
The engine must not be used until any problem has been identified and
resolved.
The engine is hard to start at low temperatures
o
Check, and if necessary, correct the battery charge level: at least 11.8 volts.
o
Open the throttle slightly
.
o
Reduce the air gap of the spark plugs to 0.5 mm (regardless of the type of candle used).
o
Replace the spark plugs.
The engine doesn’t start
o
Make sure that the main switch is in the on position.
o
Make sure that the power switch of the ECU is in the on position.
o
Check, and if necessary, correct the battery charge level: at least 11.8 volts.
o
Make sure that the fuel pressure is at least 3.3 bar, otherwise switch on the auxiliary fuel
pump or, in the case that is not installed, power off and on the ECU switch.
o
Select the auxiliary rpm sensor (only not dual version).
o
Check that there is fuel in the tanks.
o
Replace the fuel filter.
o
Replace the spark plugs.
Coolant temperature too low
o
The radiator dimensions are too big.
Reduce
the radiating surface with adhesive tape or cowl
flaps.
o
In case of a faulty thermostat it will be hard to even reach the operating temperature. Replace
if necessary.
Oil temperature too low
o
Reduce the amount of oil in the sump.
o
Increasing the operating temperature of the engine, the radiator, reducing radiator surface and
the air intake vents on the cowling.
Oil pressure low
o
Check and if necessary correct engine oil level.
o
Replace oil filter.
o
Identify possible lubricant leaks under pressure from the head gasket or oil filter.
o
Use a lubricant with higher thermal grade.
Take off maximum RPM too low
o
Reduce the pitch or diameter of the propeller.
o
Possible failure of one of four spark plugs: in this case we note also a marked increase of the
vibrations; change the spark plugs.
o
Check the level of engine oil into the sump and top up if necessary.
