5.7 merc cut out switch/ ignition module

rburg

Recruit
Joined
Jul 19, 2010
Messages
5
I have a 97 5.7 mercruiser with 2nd gen alpha one. The cut out switch is working only %50 of the time have tried a new one and even directly ground the white and green wire which I believe goes to the distributer or the ignition module there is the same color wire going to each. There are two grey ones to the coil and one purple (power) It seems better when its cold but at random times the cut out switch will not kill the motor even if you hold it, it sometimes wont even make the engine skip at all so would this mean the module is not shorting the coil or is there something else im missing???:eek:
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,196
Re: 5.7 merc cut out switch/ ignition module

If it's not working when you do it by hand the switch is possibly bad.The grounds need to be good.
Get an OHM meter and remove the switch and check it.
This is an outboard thread.Move to sterndrive and you'll get better response.Fill out the profile too.J
 
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