Kill switch question

[DUKE1]

Gents,

I feel kinda silly asking this question, but here goes. Is there a difference between a magneto based ignition kill switch and a ignition based kill switch? I understand they create the open or closed circuits at different times (one with the switch in and one when it's out) I have a 1999 Johnson 225 Looper. Your thoughts are appreciated.

Thanks
D1

 

[samo_ott]

Re: Kill switch question

The magneto kill switch just shorts the 2 magnetos together. I believe on the electronic ignition ones there's a wire from the power pack that gets grounded to kill the ignition.

 

[Dhadley]

Re: Kill switch question

On a magneto type ignition (like yours) when you turn the key to "Off" or pull the kill lanyard it completes a circuit to ground. On a battery ignition turning the key to "Off" opens (stops) the 12 volt circuit.

 

[samo_ott]

Re: Kill switch question

A '99 225 has magnetos?

 

[Dhadley]

Re: Kill switch question

Every OMC V4, V6 & V8 since 1973 has a magneto style ignition. IE - it's not a battery style ignition where the initial voltage is supplied by the battery. The initial voltage is created by flywheel magnets passing over the charge coils on the stator.

 

[DUKE1]

Re: Kill switch question

Thanks for the input...does it matter than what kind of kill switch you have? Would an ignition based switch work...or is a magneto system required.

D1

 

[samo_ott]

Re: Kill switch question

Every OMC V4, V6 & V8 since 1973 has a magneto style ignition. IE - it's not a battery style ignition where the initial voltage is supplied by the battery. The initial voltage is created by flywheel magnets passing over the charge coils on the stator.

So what was it before '73 then? I'd have said magneto?

 

[Dhadley]

Re: Kill switch question

The kill switch has to be specific to the ignition you have. There are two kinds - one completes a circuit when the lanyard is pulled and one opens (breaks) a circuit when the lanyard is pulled. Your motor uses the one that completes a circuit when the lanyard is pulled. Sierra makes a universal switch that can work either way.

The V4s just prior to 73 had a battery CD (capacitor discharge) ignition. The battery supplied the initial voltage to the pulse pack or amplifier. Prior to that there were all kinds. In 73 they used a "mag cd" (magneto capicator discharge). The ignition does not rely on an outside source for initial voltage.

 

[DUKE1]

Re: Kill switch question

Thanks for the info...could a guy make one? Take a heavy duty single pole switch and wire it to the Blk and Blk/Yel wires and call it good. OMC wants $55 for the thing and the others look like cheap plastic. Would this work and would it harm anything? My gut tells me it should work without an issue, but I thought I should ask the pro's.

Thanks,
D1

 

[DUKE1]

Re: Kill switch question

Well I just wanted to finish this thread off with what I did. I went a bought a heavy duty single pole switch, and wired it to my blk/yel & blk wires on my ignition switch and it works great.

So if anyone is interested..yes you can just use a switch to make an emergency kill switch.

OMC wanted $55.00

I paid $6.00 for the heavy duty Sierra switch.

Duke1