Checking The Charging System

[Paul J]

i suspect i have blown the rectifier on my outboard as it does not seem to be charging.

 

Does anyone know how to confirm that it's this and not the stator using a multimeter?

 

I know the basic test is to check the battery volts are 13+ volts while running which it aint. Im not too savy on the meter settings and which wires to check.

 

the rectifiers got 3 posts- 2 yellow wires from the stator and one red one to the switch i think

 

any advice welcome

 

Paul J

[Paul D]

Paul measure the voltage with the multimeter set to A/C volts between the two yellow wires - should read something with engine running = stator OK.

 

The measure the voltage with multimeter set to DC volts between the red wire and earth ( ie. One prong on the rectifier pin connected to the red wire and one held to the metal casing ) - should read battery volts and then go up in voltage when engine is running.