Substitute newer switch box in 25 hp mercury

Lew13

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Jul 24, 2010
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I have a 1981 25 hp mariner with a bad switch box. the number 1 coil stopped firing after I tightened the nut on the switch box coming from the trigger coil under the flywheel. I think I tightened too much and broke the connection inside the switch box. can I repair this?
I have a switch box fron a 1995 mariner that I would like to rig up to this engine but it has a connector with red, blue and black wires. How can I wite this into my engine?
 

Laddies

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Sep 10, 2004
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Re: Substitute newer switch box in 25 hp mercury

No, it has a electronic spark advance built in the box.
 
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