Starter slave cylinder location

Lugnutz

Member
Aug 3, 2009
97
Tacoma, Washington
Boat Info
300 Sedan bridge
Engines
Twin GM 350 Merc's
Quick question, I purchased an 85 300 Sedan bridge last fall. Twin GM 350’s

I have a no crank condition on the starboard engine. It will crank from the starter motor with a starter button but not at the key and the circuit breaker is working.

Following the wiring diagram it has a starter slave solenoid but it does not have a location of where it is and I have been unable to find it.

Does anybody have an idea where it might be hiding? :huh:
 
Pending on the boat you could have a neutral safety switch issue as stated above, if you are getting a clicking sound it's more than likely the solenoid. The safety switches are located on your transmission as well as your shifters (two sets on my boat). The solenoid is usually located on the top of the motor near the circuit breaker.
 

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Had the same issue. Turned out to be the slave solenoid on my port 7.4 MPI. It did not make any clicking noise.
http://clubsearay.com/showthread.php/67334-All-of-a-sudden-Port-Engine-no-Start

--Mike

This was the exact thread that helped me fix my issue last year... both of my solenoids were shot, worked intermittently... Thanks for posting originally!! Mine would click but not start, so I knew it wasn't the safety switches as previously expected before reading your post.
 
Thanks for the quick response guys. Nothing clicked when I turned the key. I went out and looked before I had to leave for work and found it behind the circuit breaker. I had to hang upside down move the exhaust hose out of the way, bend the circuit breaker cover out of the way and look behind the circuit breaker. It was hidden pretty good. Similar to the picture above but a lil different. Won't get to test it until tomorrow morning thought. I have an appointment to have it slung into the water on Thursday. Hoping I don't get anymore surprises.
 
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No noise it when you turn the key could mean two things either some thing up stream is preventing it from getting voltage or the coil is bad in the solenoid.
 
Try spraying the solenoid with WD 40 just before you turn the key. If that helps, it's probably a bad (corroded) connection on the solenoid. Anyway, they are fairly cheap, and easy to replace.
 
Thanks for the help. Solenoid was the culprit. I swapped it out and it starts now.
This is a new boat to me and I am in the process of learning all of its quirks and working out the bugs.
 

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