Re-Wire of engine... 1 last thing to sort out..

[Noodleman]

Hi guys,

I have a mariner 60 electric start engine (old old OLD model)

I have had to re-wire it recently, which I have nearly completed, however I have one thing left to sort out, and would appreciate some advice from those in the know.

I can start my engine, however I am having a problem getting it to stop!

Originally I thought it would be a case of cut the +12v power into the ignition unit, however after trying this, it makes no difference at all. so I assume this is only really used when starting the engine....

So, in order to stop the engine, is it a case of cut the power to the coils? (+12v in, or unground them all to break the circuit?)

Alas, i have asked this question before, and was told to connect something it a certain colour wire, however, this engine has completly non standard wiring, which is why I am trying to figure out how in most engines, the engine is stopped....

Thanks in advance for any replies.

Alec

 

[jhebert]

Re: Re-Wire of engine... 1 last thing to sort out..

Most outboard motors are stopped by a circuit in their ignition switch which shorts out the primary spark coil voltage supply. This is shown in detail in an article at

http://continuouswave.com/whaler/reference/ignitionSwitch.html

Although the wiring shown in the above article is specific to OMC motors, I suspect that Mercury motors use a very similar arrangement. The KILL circuit for the safety lanyard is simply wired in parallel with a set of contacts on the ignition switch.

 

[Noodleman]

Re: Re-Wire of engine... 1 last thing to sort out..

Most outboard motors are stopped by a circuit in their ignition switch which shorts out the primary spark coil voltage supply. This is shown in detail in an article at

http://continuouswave.com/whaler/reference/ignitionSwitch.html

Although the wiring shown in the above article is specific to OMC motors, I suspect that Mercury motors use a very similar arrangement. The KILL circuit for the safety lanyard is simply wired in parallel with a set of contacts on the ignition switch.

Thanks for that, useful link, however a couple of issues that maybe I should have mentioned in my original post.

I am not using an ignition barrel/switch, I am using a push to start button.

There is currently not a kill circuit either (no safety lanyard)... which is part of me working out how to kill the engine so i can make one.

So... going by the information that you have given me, am I correct in thinking that, by adding a switch (switch for example, just to test the theory for now) between the +12v into the primary ignition coil, and ground... If i short that (open the switch) then this should stop the coil from firing, and stop the engine?

Sorry if im over thinking things, but I like to be thorough in my theorys before testing stuf

 

[twkjr 1250]

Re: Re-Wire of engine... 1 last thing to sort out..

look at wild bills post there is a detailed wire discription for the stop engine wires

 

[Noodleman]

Re: Re-Wire of engine... 1 last thing to sort out..

look at wild bills post there is a detailed wire discription for the stop engine wires

Sorry to be a pain, any chance you can link me?

I am not sure which post you mean.

Thanks

Alec.

 

[jhebert]

Re: Re-Wire of engine... 1 last thing to sort out..

... going by the information that you have given me, am I correct in thinking that, by adding a switch (switch for example, just to test the theory for now) between the +12v into the primary ignition coil, and ground... If i short that (open the switch) then this should stop the coil from firing, and stop the engine?

Sorry if im over thinking things, but I like to be thorough in my theorys before testing stuf

The voltage to the spark coil primary is not 12-volts. It is more like 300-volts.

You will not short the circuit to ground by opening the switch. You will short the circuit to ground when you close the switch.

 

[jimg984]

Re: Re-Wire of engine... 1 last thing to sort out..

sounds like you got the hot wire to the rectifier hooked to the ing. side of your switch.......... which in turn when the motor is running the rectifier is supplying power back to ing, even after the switch is turn off, keeping the ing hot...... hope this makes sense to you GL