How do you wire out an Automatic Choke?

[Aquadzac Captain]

I have a new marine Edelbrock 600 for my OMC 350. There are two wires? Where do the go exactly??<br /><br />Thank you all ahead of time.

 

[f_inscreenname]

Re: How do you wire out an Automatic Choke?

Black ( - ) goes to a good ground. Red ( + ) goes to a key switched 12 volt power source (so it has power go to the choke when you turn the key on).

 

[Chucksvette]

Re: How do you wire out an Automatic Choke?

I would guess that they are hooked up the same as an auto carb. The black ground wire is simply run back and connected to one of the screws holding the choke on. The red hot is connected to a switched(meaning voltage is switched on and off with the ignition switch) 12 volt source.

 

[Aquadzac Captain]

Re: How do you wire out an Automatic Choke?

So the power + (red) goes to a constant power-on source..12v dc? Yes?>

 

[f_inscreenname]

Re: How do you wire out an Automatic Choke?

A source that come on and stays on when the motor is started and run and goes off when the key/motor is turned off.

 

[qystan]

Re: How do you wire out an Automatic Choke?

Edited to remove dud info.

 

[Aquadzac Captain]

Re: How do you wire out an Automatic Choke?

Whewwwww! Thanks Qystan now that makes more sence!! Sure would have blown that choke. I am working on the push key choke and now can get this done right. Kudos member: 40440!!

 

[f_inscreenname]

Re: How do you wire out an Automatic Choke?

Dude A Edelbrock 600 wires up just the way I say. The choke works like a spring as it gets hot (electric on) it will hold the choke plate open. When it cools down (key off) the spring shrinks and closes the choke plate. If you add power at start up and then cut it off the choke coil will not get hot enough to open the plate leaving the choke closed all the time. I have a Edelbrock 750 for the last two years wired that way (like the manual says) and it works just the way is supposed to. The way you set (close) the choke before start up is by pushing the throttle open by about a 1/4 way. That releases a catch and allows the choke spring to close the choke plate. <br />PS If you wire it anyway but like I said you might as well take the choke off because it will cause nothing but problems. Outboards and I/O are two different worlds.

 

[navigator336]

Re: How do you wire out an Automatic Choke?

Aquadzac, <br /><br />In case you want more opinions on the correct method, f_inscrrenname is absolutely correct!

 

[flashback]

Re: How do you wire out an Automatic Choke?

yep I have an edelbrock with elect choke, black is to ground and red is to coil. (or any other connection that is hot when the key is on.... had it this way 2 years and no problems.........

 

[qystan]

Re: How do you wire out an Automatic Choke?

Aquadzac<br /><br />From what I've just read, I am wrong in my info. Sure is strange way to design it. <br /><br />Took a look in the Seloc manual, it describes the Holley elect choke operation as f_inscreename described. The coil is a heater coil, one would expect it to be a choke pull-close coil. The choke is the same mechanical thermostatic design<br /><br />In case things have changed. From the description given, you can confirm by wiring up 12V to the coil and observe how the choke behaves. Do this on a bench before you wire up, believe you know how to proceed from there.<br /><br />I am planning on replacing mine with an Edelbrock primarily because the electric choke. I hardly need choking over here and its harder to start. Please let me know the outcome.<br /><br />Thanks guys for pointing the error.

 

[Aquadzac Captain]

Re: How do you wire out an Automatic Choke?

Cant imagine a constant power to the choke but will take this on a test bench. The directions from the Edelbrock manual only states to a 12v power supply so by that I assume power always on. My old boat had a push choke starter but this is new. I will report back on the test soon. Thanks f_inscreename for keeping us straight and thanks to all of you coming back to agree. One more day and I may have this new carb up and running!! Pics to come later on the new beauty.

 

[Ralph 123]

Re: How do you wire out an Automatic Choke?

Read the Edlebrock installation instructions for yourself:<br /><br /> http://edelbrock.r-catalog.com/ImgVD/EDE/1400_Inst.pdf <br /><br />Note what is says for the choke: "To ignition key activated 12V source; NOT coil or Altenator"

 

[flashback]

Re: How do you wire out an Automatic Choke?

Ralph, that was interesting reading, I wonder why they don't want it connected to the coil? I guess because the voltage may not be high enough.. coil has about 10 volts I think....looks like I might be changing my connections..........

 

[RomanRegal]

Re: How do you wire out an Automatic Choke?

I have my electric choke positive wired to the positive on the coil. That wire is twelve volts. When the key is turned to start the voltage does drop. However, by that time the chike isactivated. I looked at severalother set ups before doing this. Most electric chikes are wired to the coil. It has worked all summer. Roman

 

[flashback]

Re: How do you wire out an Automatic Choke?

I thought it was the other way around, the votage is at 12 while starting and 10 when running.

 

[Aquadzac Captain]

Re: How do you wire out an Automatic Choke?

Yes, I belive the output of the coil while running is less than 12 down to 10 or even lower based on coil and other resistance factors.

 

[Dunaruna]

Re: How do you wire out an Automatic Choke?

 

[Dunaruna]

Re: How do you wire out an Automatic Choke?

Two reasons why you should not connect a thermo spring choke to the coil. <br /><br />1. The coil + when running is resisted to 8 - 10 volts. <br /><br />2. Adding an accessory such as a choke will rob the coil of voltage, often low voltage to the coil causes ignition problems.<br /><br />Aldo