Reply To: 57 35hp – wiring questions please?

[JACQUES]

let’s backtrack a bit…

I  erroneously indicated your mercury switch was for interrupting the START process  should the motor be tilted up….. a comment based on my old Merc .

….since you picture shows a mercury switch associated with the throttle it may in fact be a safety to prevent START in case the throttle if set to high above START

In either  situation (Mercury  or  OMC )  the mercury switch  is there to OPEN the solenoid start  circuit as a safety device.   WHen  your solenoid loose this critital ground  no current  would be able to (flow)  energize the starter solenoid.

This is easy enough  to test …setting the throttle to FAST  should prevent the start solenoid  from doing it’s job and  keep you from going for  swim !

As to the kill circuit using the vacum  it is well describded in the manual.

that is my understanding of it anyway… have you  got the motor  working  ??

vacum switch wise it would be a very temporary interruption of ignition during rapid RPM drops.   but the start circuitry should allow the starter to get you going.

 

see manual 492-493 and  other pages

 

 

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