Just picked up old pontoon boat, with 70 hp Force. Hasn't been used for several years. Tach appears hooked up, but won't work....thanks to forum, gonna check for corroded connections.
What are these two wires for, at the engine? they're not the trim.

What would these two wires have been connected to? Coming off the main wiring loom from motor?


Here's the back of the tach with wires hooked up.

Thanks,
What are these two wires for, at the engine? they're not the trim.

What would these two wires have been connected to? Coming off the main wiring loom from motor?


Here's the back of the tach with wires hooked up.

Thanks,
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