emergency start solenoid - trying to locate

rcon

New Member
Jun 16, 2011
481
Adelaide
Boat Info
Preparation
'93 300 Sundancer
w/ Kohler genset
Raymarine E7D
Engines
4.3l Mercruisers w/Alpha 1
Hi all

I've been cataloguing all the switches and connections I can (hardly anything is labeled), but I'm yet to find my emergency start solenoid switch. I have one switch of unknown purpose on my dash (after market location I'm sure) and I'm wondering if it might be this switch. Trouble is, I have no idea what I'm looking for in the engine room to test if it is bridging correctly.

The unknown switch is an on/off type.

1993 300DA, any idea what my solenoid would look like? The sports cruiser manual photo is very blurry and I cant make it out.
 
Emergency starter switch should be located between port and starboard engine starter switches.
 
41W9cobKYlL._SL500_AA300_.jpg


My solenoid looks like this next to my battery switches on the firewall. Switch is actually a momentary push button next to the horn button.
 
Last edited:
Emergency starter switch should be located between port and starboard engine starter switches.

That's what I thought, but I've traced the two switches with the keys (its a '93 model) to horn and window wipers - had to use multimeter as neither worked. There is a bank of 3 switches, one for front flood light, a toggle for vent actuator and a third "on/off" style for something else. I'm hoping it's for this solenoid.

Thanks for the pic, I'll be crawling around looking this weekend.

More research tells me I can probably test for this emergency start option by disconnecting one battery and trying to start that engine (which is only logical), positive disconnect only?
 
That's fantastic, thanks.

Not sure it reflects exactly as per my boat - actually looks significantly different in a few places - but should help a lot.

Would sea ray still have details of what my HIN was commissioned as?
 
In addition to 3 battery bank (port, stb, genset) switches, I've also got a large none/1/all/2 switch.

On a whim on the weekend, I left one battery off, put the large selector to all and found I could start both motors.

Could this be a proxy for the original toggle switch?


I had no luck finding a switch as described above in replies.
 
bump.


The large selector switch looks a lot like this (without the fancy lock!)
208018F-p.jpg




Do these switches, when in "all" position, allow me to start both engines from one batter? Sure seemed that way....
 
Update.

Yesterday I went out for my first dive off Preparation. Awesome. Dive was miserable, but it was from my boat so that made it all ok :) Heck, I even had to run back to the marina as I discovered my tank had vented in the car overnight, but I was on my boat so all good *rolls eyes*

Before I left the marina however, I did my usual battery voltage check - one cranking battery was only at 12v. Checked water levels and found a cell dry - I leave my converter circuit on so this is to be expected I believe.

Anyway, other battery was showing 12.8v, so I decided to only use this battery for the morning - I was only going to be 10 min along the shoreline from the marina, at a heavily fished jetty, for my dive so I wasn't too concerned about being stranded.

Toggled off the down battery, flicked selector switch to all and was able to operate all morning. Made point of switching off good battery whilst on the hook tho.

So, short version is, anyone looking for this mysterious emergency start toggle switch might have it as part of their selector setup. Of course I now need to identify what the last on/off switch on my dash does, but at least I have some confidence I can "cross start" my engines from either battery.
 

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