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1997 Mercury 90 Kill Switch Wiring

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pyrodenis

Member
Acquired and started rehabbing this engine, after years of non-use. Kill switch was bad and engine would only start if the wires were shorted. Just changed ignition switch to Sierra with two "M" terminals. One of the kill switch wires went to the "M" ground terminal and I think the other went to the other (Magneto) terminal, but unsure as it broke, due to corrosion.
Now the engine won't start. I've connected the two kill switch wires to the two "M" terminals, but still no joy. (It could be flooded. I have fuel seeping out between shaft housing and gear case. Could this be exhaust of un-ignited fuel?)
Anyway, I thought I read that this Mercury should be "Open to Run", so my situation is different.
Can someone tell me for sure:
1. Do the kill switch wires go across the "M" terminals?
2. If not, doesn't one go to the ground terminal of the Ign switch, and the other somewhere else?
3. Where else?
Thanks
 
Today, i'm going to assume that I was mistaken to assume that my kill switch short had anything to do with it running. Going to start at the engine and trace the BLK/yel line and make sure it's not grounded.
 
Having a good forum chat with myself. Changed Blk/Yel to Magneto position on IGN sw, and put the larger BLK on Grd terminal. Confident that's right.
Still won't start. Have spark at plugs, but it could be weak. Still won't start. Going to read threads on weak spark.
 
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