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Fixing motor safety issues on used Yamaha
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<blockquote data-quote="wmk0002" data-source="post: 481581" data-attributes="member: 13975"><p>You are right, the black wire coming from the 7 pin connector typically splits and goes to the key switch and then is used to ground backlights on gauges and whatnot. The white wire comes from the CDI box, so when you turn the key off it closes the white to black loop and grounds it out killing the signal before the box send fire to the coils and if the emergency kill switch is pulled it does the same thing. Where are you planning in installing the emergency kill? The white wire on the CDI box should have a bullet connector you can unplug and then tap the kill switch into. You can use any ground too but the black wire from the CDI box should also lead to a common ground which would be the easiest to use I bet. There is a chance this doesn't align with your motor but this is how my 1988 30hp 2 stroke is.</p></blockquote><p></p>
[QUOTE="wmk0002, post: 481581, member: 13975"] You are right, the black wire coming from the 7 pin connector typically splits and goes to the key switch and then is used to ground backlights on gauges and whatnot. The white wire comes from the CDI box, so when you turn the key off it closes the white to black loop and grounds it out killing the signal before the box send fire to the coils and if the emergency kill switch is pulled it does the same thing. Where are you planning in installing the emergency kill? The white wire on the CDI box should have a bullet connector you can unplug and then tap the kill switch into. You can use any ground too but the black wire from the CDI box should also lead to a common ground which would be the easiest to use I bet. There is a chance this doesn't align with your motor but this is how my 1988 30hp 2 stroke is. [/QUOTE]
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Fixing motor safety issues on used Yamaha
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