1989 Johnson 200 - is additional wiring needed to start the motor from the remote?

[osuchica1284]

So I'm ready to test fire my Johnson 200 to make sure it runs - have my fuel line disconnected from the water separator and shoved into a 5 gal fuel container of premix and ready to put the battery back in BUT the previous owner had a rats nest of wires plugged into the battery, a lot with broken O ring connectors, corroded automobile wires, splices using wire nuts, etc. I'm pretty certain I don't need any of it right now ...

My factory service manual just came in the mail today BUT I can't find a decent wiring schematic anywhere - the majority of it is simplified troubleshooting steps -> Test A to ground and look for voltage, etc

Assuming the Johnson wiring harness is untouched and the remote works correctly, do all I need to do to start(stop) and run the motor for testing is connect the 4awg cables coming off the motor to the battery and crank the key on the remote?

Help?! Thanks!

 

[daselbee]

Yes. Should be all you need.
Remember, if you disconnect the big red cannon plug...the motor will still start...but just not from the key. If you were to jump the starter solenoid with the red plug disconnected, it will run. It will also run with the battery disconnected. The motor is it's own stand alone power generator for engine running.
Also, if big red plug is disconnected and engine is running, the key will not shut it down....so there's that...

The only thing the battery is for is the initial cranking. After that...NADA.

So, the above is just a quick fun filled fact list re: the ability of the motor to run disconnected.
In other words....there ain't no extra wires needed to run the engine.

If you have everything hooked up harness-wise, and the harness is OK, it should start from the key.

All factory service manuals have a fold out wiring diagram in color in the back of the book.

 

[osuchica1284]

Yes. Should be all you need.
Remember, if you disconnect the big red cannon plug...the motor will still start...but just not from the key. If you were to jump the starter solenoid with the red plug disconnected, it will run. It will also run with the battery disconnected. The motor is it's own stand alone power generator for engine running.
Also, if big red plug is disconnected and engine is running, the key will not shut it down....so there's that...

The only thing the battery is for is the initial cranking. After that...NADA.

So, the above is just a quick fun filled fact list re: the ability of the motor to run disconnected.
In other words....there ain't no extra wires needed to run the engine.

If you have everything hooked up harness-wise, and the harness is OK, it should start from the key.

All factory service manuals have a fold out wiring diagram in color in the back of the book.

Thank You! I just grabbed my manual as soon as I read your last sentence lol

Right after I posted my OP, I went outside and hooked the battery up to just the motor and yup, it cranked. But I didn't hook the fuel up after reinspecting the line going into the motor and saw it either has a lot of varnish or some type of clear plastic clogging the line - need to hit up the marine store first thing!

So if the red plug is disconnected and you jump the motor, how do you electrically stop it?

 

[daselbee]

You don't electrically stop it. You shove rags in the carb and intake throats and it chokes down.

I just told you this stuff so you would be aware.

Or if you are GOOD, you plug up the big red plug real quick, and if the key is OFF, it will kill itself.

 

[osuchica1284]

You don't electrically stop it. You shove rags in the carb and intake throats and it chokes down.

I just told you this stuff so you would be aware.

Or if you are GOOD, you plug up the big red plug real quick, and if the key is OFF, it will kill itself.

rags in the throttle bodies - that's sounds harsh!!!

The key has to be doing something to stop the motor electrically - is it breaking a circuit when you turn the key to off or grounding a circuit?

btw, started the motor and it runs good for a sitting motor EXCEPT for no water shooting out the **** tube - pulling the lower unit off tomorrow to inspect

 

[cfauvel]

OP...if the red plug is disconnected, then there is no way for the key switch to stop the motor electrically as you have literally broken the connection at the red plug....so the rag action is your only recourse. or you can try to re-connect the red plug and hope you don't short something...

why is the red plug disconnected?

 

[daselbee]

It is not disconnected. He wanted to know if there were "extra wires" required to run the engine. I told him no, and that it would even run with the red plug disconnected.
I don't know what he is doing......in his hands on world....

 

[osuchica1284]

It is not disconnected. He wanted to know if there were "extra wires" required to run the engine. I told him no, and that it would even run with the red plug disconnected.
I don't know what he is doing......in his hands on world....

Nothing is disconnected, the motor runs fine - I'm just curious that by DISCONNECTING a plug on the engine, it keeps running with no way to stop it. If you did the same thing on a car, the engine would shut off because power would be lost to an important ignition circuit. (among others)

Now I understand that these motors are pretty self contained in that they generate their own power once started so what I was asking is what role does the ignition switch play in shutting the engine off? It can't be that when the switch is in "START/RUN" it energizes something on the motor because as soon as you disconnect the plug, that circuit would die.

I just thought you guys would know off the tops of your heads

 

[daselbee]

" I just thought you guys would know off the tops of your heads "

I do.

Two wires run from the engine up to the key switch through the aforementioned big red plug. The black Ground, and the black/yellow stripe kill wire. When key is OFF, these two wires are shorted together, thereby killing the engine. When key is ON, the two wires are open to each other.