If oil tank is on top of engine it does not have guardian mode, only the 3 liter 200EFI with tank on side has it and if it has a tank its not a 4 stroke.
[FONT=Verdana, Arial][FONT=Verdana, Arial]The warning module will sound the same alarm no matter what part of the oil system is signalling. If the alarm is a steady BEEP, it is an over heat alarm. If the alarm is a BEEP BEEP BEEP, it is an oil alarm, and is caused by either:
--oil level float switch in reservoir
--magnetic sensor in oil mixing pump input drive shaft has stopped rotation
--a defect in the alarm module itself (a common failure)
--weak spark on #5 cylinder as module does not see correct signal from switchbox and rotation sensor( swap to #3 for testing)
Because there are no indicators and the the alarm tone is the same, you have to deduce which sensor is causing the problem.
You can deduce if the problem is the oil level in the under-cowling reservoir by checking the level. If the level is at its normal condition, almost full, the float switch could be signaling a false alarm. You can check this with a meter to see if the switch is actually signaling an alarm.
If is much more difficult to assess the motion sensor. Monitor the output of the motion sensor alarm and verify that it produces an output pulse of 5-volts for every two rotations of the engine crankcase.
If the motion sensor checks out, the next step is to change the engine's fuel supply to a pre-mix 1:50 oil:gas ratio source, and run the engine. You then disassemble the oil pump output hose and check to see if it is actually pumping oil.
[/FONT][FONT=Verdana, Arial]If, after all of these checks, the alarm condition persists, you conclude the alarm module itself is defective and replace the alarm module.[/FONT]
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