73 9.5 Evinrude stop switch question.

[mettyfish]

Put in new stop switch didnt work. Finally got flywheel off and I get continuity from the connectors to the ignition plate and wires. Guess i'm not figuring out how the stop switch works to cut power. Help. It's my father in laws motor and I want to be done with this refurb. Thanks for any help. Metty

 

[Vic.S]

Re: 73 9.5 Evinrude stop switch question.

The stop switch is wired between the two sets of points. it just shorts them together to stop the engine.

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

Why is mine not working? I even ordered a 50 dollar new one. Metty

 

[bktheking]

Re: 73 9.5 Evinrude stop switch question.

Why is mine not working? I even ordered a 50 dollar new one. Metty

Try touching the wires together without the switch.

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

I will try that. I do get continuity between the two wires at the points. I also get continuity at the switch connectors when i press the switch on and off. I don't understand what my problem is. Any more ideas? Metty

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

Now I have unhooked stop switch wires from the points and put my ohm meter on wires. Pressed the stop switch and I get continuity all to way to the connectors that go to the points. But still does not stop motor. What is left. Tearing my hair out now. HELP Metty

 

[F_R]

Re: 73 9.5 Evinrude stop switch question.

Now I have unhooked stop switch wires from the points and put my ohm meter on wires. Pressed the stop switch and I get continuity all to way to the connectors that go to the points. But still does not stop motor. What is left. Tearing my hair out now. HELP Metty

I can see why you are tearing your hair out. It should be working. As said previously, the stop switch connects the two sets of points together to stop the motor. Ain't no way you can connect them together and it keep running. There is something you are missing with your testing. But I don't have the foggiest notion what it is.

I assume the magneto is ok because it runs properly. (It does, right?)

Check for continuity between each unplugged stop wire and armature plate ground. Should have continuity to ground on each one. Well, actually it should have zero ohms if the points are closed and about an ohm if they are open---virtual continuity.

With the switch unplugged, jump the two magneto stop wires together when running. That should kill the ignition and stop the motor.

 

[ezeke]

Re: 73 9.5 Evinrude stop switch question.

It can't work if its not wired correctly, so click the thumbnail and see if your kill wires are connected like the ones circled.

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

thanks for the replies. Yes is does run properly. And I am wired up just like the picture. Guess I need to put it all back together and try it. I will update shortly. Thanksagain, Metty

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

Ok just put it back together and ran it. Stop switch does not work still. So I unplugged connectors in middle of wiring. Jumped across the connectors. Sparked a little and barely coughed once but continued running. One thought I have is what is the possibility my points are not adj. correctly. My father in law just bought this motor so don't know much history. Thanks to all again. Metty

 

[bktheking]

Re: 73 9.5 Evinrude stop switch question.

It wouldn't run if the points were that far out, besides adjustment wouldn't have any issue with stopping. Look for any type of plastic washers seperating the wires on the eyelet connectors, someone may have added them. If I were you I'd replace both wires and try it.

 

[Tim Frank]

Re: 73 9.5 Evinrude stop switch question.

Shouldn't the switch be grounding the points?

 

[bktheking]

Re: 73 9.5 Evinrude stop switch question.

Shouldn't the switch be grounding the points?

My 9.5 connects under to the flywheel to the points, no connection to ground.

Duckworks has a great article on how to wire to twin coil magnetos:

http://www.duckworksmagazine.com/05/columns/max/3/free.cfm

 

[F_R]

Re: 73 9.5 Evinrude stop switch question.

Shouldn't the switch be grounding the points?

Tim, the switch DOES ground the points. It grounds them through the other set of points AND the coil primary attched to them. It is easier to merely say it connects the two sets of points together, but in reality when you connect them together you are grounding them.

Metty, is there any chance it is not running "properly", but running on one cylinder? If it has a bad set of points AND an open circuit in the coil primary, the switch wouldn't stop the other cylinder. That would be a very rare coincidence. However the continuity check to the armature plate that I previously suggested would find that.

Personally, I think you have a broken or corroded wire, just enough of a connection to fool your continuity tester, but not enough to carry the current involved

 

[restornator]

Re: 73 9.5 Evinrude stop switch question.

just replace the wires, how hard it that?

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

I basically did replace the wires. That how all this started. Let me start from the begining. Father in law buys boat and motor. He knows absolutely nothing about motors and boats. Really should not even own one with his knowledge. And he was in the coast guard retired. HEHE So I go over and replace impeller for him. Fire up motor and the exhaust hose is leaking. I said we need to replace that hose. I go and try to stop motor and and it won't stop. I look at the wiring from switch and all the wire coating is falling apart. He takes it to a couple of boats mechanics and they tell him its to old for them to work on. I tell him I will fix it for him. I find the discontinued hose and replace it. I notice the switch threads aare broken. So between the wire coating falling apart and the cracked switch I order a new one at 50.00 bucks. The switch comes with connectors and I install new switch and fire it up. Wiring looks great from connectors on up to under flywheel. Switch does not stop motor still. I pull fly wheel and ohm out wires to points. Everything checks out with continuity checks. I get continuity from switch to connectors. Connectors to each point. Continuity from each point to stator plate Continuity from point to point. Unhooked wires from each point and check continuity from switch to each loosened connector. Push switch and get continuity then let off switch no continuity. This is all the way to the switch point connectors. Disconnect switch connectors and fire up motor and jump across connectors thus bypassing switch and it sparks at jumper and coughs once barely and won't stop then either. I don't think motor is running on one cylinder as it seems to run good and idle down well. I am really at a loss here. If it was my motor I really would not care. I would just choke it till it turns off. But father in law is very inexperienced and I would like this motor to operate correctly for him as to not cause any unneeded issues. So throw me some more ideas and I will try anything suggested. Sorry for the long read but I wanted to cover all I have done. Thanks, Desperate Metty

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

I basically did replace the wires. That how all this started. Let me start from the begining. Father in law buys boat and motor. He knows absolutely nothing about motors and boats. Really should not even own one with his knowledge. And he was in the coast guard reserves retired. HEHE So I go over and replace impeller for him. Fire up motor and the exhaust hose is leaking. I said we need to replace that hose. I go and try to stop motor and and it won't stop. I look at the wiring from switch and all the wire coating is falling apart just from the switch to the connectors in middle of harness. He takes it to a couple of boats mechanics and they tell him its to old for them to work on. I tell him I will fix it for him. I find the discontinued hose and replace it. I notice the switch threads aare broken. So between the wire coating falling apart and the cracked switch I order a new one at 50.00 bucks. The switch comes with connectors and I install new switch and fire it up. Wiring looks great from connectors on up to under flywheel. Switch does not stop motor still. I pull fly wheel and ohm out wires to points. Everything checks out with continuity checks. I get continuity from switch to connectors. Connectors to each point. Continuity from each point to stator plate Continuity from point to point. Unhooked wires from each point and check continuity from switch to each loosened connector. Push switch and get continuity then let off switch no continuity. This is all the way to the switch point connectors. I don't think motor is running on one cylinder as it seems to run good and idle down well. I am really at a loss here. If it was my motor I really would not care. I would just choke it till it turns off. But father in law is very inexperienced and I would like this motor to operate correctly for him as to not cause any unneeded issues. So throw me some more ideas and I will try anything suggested. Sorry for the long read but I wanted to cover all I have done. Thanks, Desperate Metty

 

[F_R]

Re: 73 9.5 Evinrude stop switch question.

Your words: "Disconnect switch connectors and fire up motor and jump across connectors thus bypassing switch and it sparks at jumper and coughs once barely and won't stop then either."

That HAS to stop the motor. No way it can run if the points are actually connected together and everything else is as you say. I can tell that you are no dummy and you know what you are doing, but you are missing something with those wires. I wish I knew what it is. I know, so do you.

EDIT: Just for laughs, and to prove it is true, connect a temporary wire directly between the two points and see if you still have spark at the plug wires. If you still have spark, I'll eat the Irish stew I made last night. It is AWFUL!! Defective recipe from the internet. Wife says it stinks. She is right.

 

[Tim Frank]

Re: 73 9.5 Evinrude stop switch question.

Tim, the switch DOES ground the points. It grounds them through the other set of points AND the coil primary attched to them. It is easier to merely say it connects the two sets of points together, but in reality when you connect them together you are grounding them.

Metty, is there any chance it is not running "properly", but running on one cylinder? If it has a bad set of points AND an open circuit in the coil primary, the switch wouldn't stop the other cylinder. That would be a very rare coincidence. However the continuity check to the armature plate that I previously suggested would find that.

Personally, I think you have a broken or corroded wire, just enough of a connection to fool your continuity tester, but not enough to carry the current involved

That doesn't make sense to me....not saying it's not correct, and since it's FR, it doubtless is. Just can't picture it ; I'll have to sketch it out.

Never thought about the wiring of one of these switches before, but I would have assumed (did assume ) that a wire from each set of points would have come to one switch terminal and the other terminal would go to ground....but then the points would be connected all the time....oooops it wouldn't run.

What about checking for continuity between the switch end of each wire and ground. If you take the plugs out for ease of rolling over the engine, if you pull the starter cord, the resistance should oscillate between zero and infinity. That should tell you which wire is the problem.

 

[mettyfish]

Re: 73 9.5 Evinrude stop switch question.

I will do those additional checks but now I am back to thinking about it running on one cylinder. To check for that do I just pull one spark plug wire and try to start it and then pull the other and see if it runs on just one or the other.

In my previous descriptions I should have been more clear. In middle of wiring from switch to connectors at points there is also a set of connectors that can be unpugged easily.


Are any of you in Kansas City area that might be able to help me? I would even pay someone to fix this correctly.

Thanks for sticking with me on this problem. Metty