Question on Coils

[clemsonfor]

I have had an problem with the engine dieing unexpectantly and not cranking then all of a sudden will crank say 5-10 min later. I had a bad wires on all the internal wires form the harness, so i replaced those as well as rebuilt the carbs. I have not had a chance to test it since the new wire harness. But i have been reading posts and am wondering if the coils could be heating up and giving out. It is difficult when the proble occurs to test it myself, (haven't thought of jumping the starter while back there though untill now). I cannto see any cracks in them and have checked and cleaned the grounds. My question is the inner (light colored stuff) epoxy extends past the black plastic more on the bottom than the top and, both are more than the extra brand new coil that i have (which is perfecally flat as far as epoxy and black plastic goes). I have some pics of both coils that you can see what i am talking about

 

[clemsonfor]

Re: Question on Coils

the pics don't show up have to fiqure this out i guess.

-Nate

 

[iwombat]

Re: Question on Coils

It's more likely that you've got a loose or corroded ground someplace, that is not making connection when it gets hot. Check and clean your grounds and see if that solves your problem.

 

[tashasdaddy]

Re: Question on Coils

what engine are you talking about. had a 73 50hp that did that. the power pack was getting hot and failing. when it acts up you need to check for spark. both coils are not going to go out at the same time.

 

[clemsonfor]

Re: Question on Coils

sorry left out that important info. I have a 1981 johnson 60hp.

-nate

 

[clemsonfor]

Re: Question on Coils

A thought that i had is this. What caught my attention and coused me to replace the wire harness was my black/yellow wire that goes into the connector the the orange wires out of the coils also go to them plug into the power pack only had like 7 small wires connection it before. Like i said i replaced w/a new harness. What does this black/yellow strip wire do what signal does it send is it constant power to the pack then it distributes it through the orange wires to the coils or what. Like i said also i have not tested since i replaced the wires and i feel that this wire could have been the problem, but i do not know the signal that this wire gave to know weather it could be the problem or not.

-nate

 

[tashasdaddy]

Re: Question on Coils

sure sounds like an amplifier (power pack). mine would run great, then just die. wait for it to cool and go again, and then just die. taking the cowl off when it died, it cooled off quicker.

 

[Walker]

Re: Question on Coils

The black/yellow wire is the kill circuit

 

[clemsonfor]

Re: Question on Coils

Ahh ha!!

 

[clemsonfor]

Re: Question on Coils

son of a ....!

help!!

The links are

http://www.forestryforum.com/gallery/displayimage.php?album=random&cat=12558&pos=-51339

http://www.forestryforum.com/gallery/displayimage.php?album=random&cat=12558&pos=-51339

Copy and paste unless a mod can help me out!!

I'm an idiot, no wonder i can't get this boat runnin right!

 

[tashasdaddy]

Re: Question on Coils

everyone has trouble W/ pics till the learn. things will be easier when the new program is on line. if the black/yellow was ground out, yes that could be the problem. but why would it restart after a while. the b/y is the wire from the ignition to kill the engine.

 

[clemsonfor]

Re: Question on Coils

The ground wire was also pattched and insulation rotted and taped in many places like the "kill wire" maybe it was vibrated around until it "arced" to ground? Then with me messin' with the motor pullin plugs and stuff i moved it where it was no longer touching a ground wire or metal object under the motor. Most of this wire was taped but i beleive there may have been spots where it was bare. I dunno? Why the restart, maybe something entirely diff. that is why i wanted to know about the way that bottom coil looks. Is this normal of an older coil. It almost looks filled on the edges or like a rat has chewed around the outside edge of it. I don't think a rat did it though, but just what it looks like.

-Nate

 

[tashasdaddy]

Re: Question on Coils

Nate, take it out and try it. if it stops, check the spark on both plugs. if one is not working and the other is, swap them and try again . it will run on 1 cylinder tho. and check the plugs for being wet. wet no spark.

 

[clemsonfor]

Re: Question on Coils

The reason i think it was getting "killed" is b/c it would not start and run at all not even on 1 cyl. Before this i had a carb flooding 1 cyl untill i rebuilt them and that eliminated that, now i redid that one again and the other one to to eliminate that. But it would run on the 1 cyl just at about half throttle. This time when it cuts out i cant get it restarted untill whatever happens to allow it to crank. I cant see the plugs while i crank to see if they are sparking. But i just realized that i need to jump the solonoid and i can crank from the engine and not worry about the key. If this makes sense.

-nate

 

[iwombat]

Re: Question on Coils

It makes sense.

Given your description of the problem, I suspect a bad connection someplace else even more. If your previous ground was arcing, chances are some other connection was getting hot and having trouble with the situation. Check the connections at the battery, starter and solenoid especially good. Check the cables for nicks also.

Removing the console controls from the equation is a good plan.

 

[tashasdaddy]

Re: Question on Coils

you can isolate the console controls by unplugging the wiring harness at the motor. use jumper cables ground the engine, and jump the positive to the starter. it will run like this, only way to kill it is the choke it, or turn the primer to manual, and flood it. if it runs, with the plug unplugged, the problem is in the controls, or wiring harness.

 

[clemsonfor]

Re: Question on Coils

Here are some pics of the wire harness and the shape of the wires. This shows the bare wires where the insulation just rotted off!

http://www.forestryforum.com/gallery/displayimage.php?album=lastup&cat=0&pos=0

http://www.forestryforum.com/gallery/displayimage.php?album=lastup&cat=0&pos=1

http://www.forestryforum.com/gallery/displayimage.php?album=lastup&cat=0&pos=2

http://www.forestryforum.com/gallery/displayimage.php?album=lastup&cat=0&pos=3

I think if this was not my problem it was not helping it and soon to be!

-Nate

 

[iwombat]

Re: Question on Coils

bzzzt!


I think you found _A_ problem at the very least.

 

[clemsonfor]

Re: Question on Coils

I don't know what happened to the pics but let me try and post the links again. They are not showing my pictures.

www.forestryforum.com/gallery/albums/userpics/12558/102_1297.JPG

www.forestryforum.com/gallery/albums/userpics/12558/102_1296.JPG

www.forestryforum.com/gallery/albums/userpics/12558/102_1295.JPG

www.forestryforum.com/gallery/albums/userpics/12558/102_1294.JPG

These should be the correct links. If a mod wants to he can combine this reply with the one above that should contain these pics.

-Nate

 

[tashasdaddy]

Re: Question on Coils

you can use a remote starter switch ( pictured) it will let you work at the engine much easier. you can either turn on the key, and use the remote switch. or you can unplug the big red plug, and use the remote switch. this eliminates any problem in wireing in the forward control box. But, if the engine does start the only way to turn it off is to choke the engine to flood it. this way you can check spark, compression and anything esle much easier

i'm still saying power pack, electrical surges, shorts tend to blow them. i don't see how it ran at all with that harness. they get hot, and quit, cool off then go again. finally just quit,

like i said if you are getting spark to one plug, then swap the coil completely, if the spark follows the coil you know which is bad.

http://i46.photobucket.com/albums/f119/tashasdaddy/MVC-005S.jpg