1986 OMS 4.3L with a Big Problem

[EVanover]

I went to turn it over to see if the battery were up and No clicking at all. We check the batteries and they are up. What should I check first? Does anyone have a wired diagram for a 1986 OMC 4.3. Please help if you can. It started fine last year.

Thanks Ed

 

[hystat]

Is the shifter in neutral? - I'd start at the neutral safety switch @ the shifter.
Is there power to the helm? (gauges etc functional)

 

[EVanover]

Yes Sir, we have power to gauges and also to the switch too

 

[hystat]

power to the neutral safety switch is great, but coming out of the switch is the important thing. If you have 12V + coming out of the neutral safety switch, then check for it at the round connector at the engine bulkhead. The yellow/red 16 ga. wire supplies power to the "assist solenoid" aka start relay for cranking. From the high current terminal, another red/yellow 12 ga. wire powers the starter solenoid.

If you have power to the assist solenoid but no click, then solenoid could be faulty, or it could have a bad ground (I think it grounds via the body of the solenoid to the bracket)

 

[Master mechanic]

You tried jumping the slav solenoid with the key in the run position ?

Me i start at the keyswitch if it doesn't jump.