Help, I have microvolts on black/yellow killwire.

[Vandkanten]

Hi,
I have read that there should NOT be any volts on the black/yellow killwire. But sadly I have about 0,7 volts and no sparks.

The engine is a 3cyl 35 HP Evinrude 1997, started by rope.

Kill switch and wire harness is disconneted, so the killwire is floating in air. No batteries is connected.

How am I able to have 0.7 volts on this wire when the engine is not running?

How do I debug this ?

Any help is appriciated.

 

[dingbat]

First try debugging your voltmeter. You can’t get 0.7 volts out of thin air.

Make sure your meter is set on DC volts. Measure an AA battery (1.5vdc) to make sure your meter is reading right

 

[F_R]

You CAN get volts out of thin air. It is called leakage. Can also be caused by magnetism from another wire (induction). The kill circuit carries a few hundred volts, so it will leak across any dirt, moisture, etc. Actually, it can also be a false reading from your hands touching the meter leads.

First step is make sure everything is clean.

 

[Vandkanten]

I put one probe to kill wire and one probe to ground. Measures 0,8 and 0,0 when I put kill wire to ground.

I looked at the multimeter, having these scalas: 20v, .2000mv, 0.200mv - I am measuring on 0.200mv

So first of all I was wrong about the 0.7v.
Guess it has to be 0,7 mv right ?

 

[F_R]

Clarification needed. You are putting meter leads to ground and kill wire--right? Where on the kill wire? Disconnected wire coming from power pack? Or disconnected wire going to kill switch? This is a rope start motor with just a kill button? Or an electric start motor with a key switch? Or what?