1963 evinrude spedifour 75hp. no spark

[ctaylor2069]

ive got a 63 evinrude speedifour 75hp. has no spark. testing with ohm meeter and have correct readings all the way thru to the coil. but when i fire it up i have no spark. could the distributor be bad? or wires? have been working on this for a while and just have had about. enugh. please any input would be greatly appreciated.
thanks. chad.

 

[boobie]

Re: 1963 evinrude spedifour 75hp. no spark

Do the spark plug wires come out the sides of the distributor cap or are they pointed straight down ??

 

[82rude]

Re: 1963 evinrude spedifour 75hp. no spark

do a search and look for my post on same motor.has same issues and was fixed easily with the help of a fellow poster.i honestly don't remember what it was.

 

[82rude]

Re: 1963 evinrude spedifour 75hp. no spark

did it look like this one?

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

No its magneto style and how long ago was your post? 82rude?

 

[boobie]

Re: 1963 evinrude spedifour 75hp. no spark

The biggest problem those magnetos had was with a bad rotor grounding out. Just a thought.

 

[F_R]

Re: 1963 evinrude spedifour 75hp. no spark

Agreed, the rotor was a common problem. But don't jump to conclusions. Remove the distributor cap and see if it produces a spark off the coil button. If it does, you know everything is ok up to that point and check out the cap and rotor & wires. No spark off the coil button? Well you get the picture..........

 

[82rude]

Re: 1963 evinrude spedifour 75hp. no spark

I think a couple of years ago 2011?if I remember correctly it was FR that pointed me in the right direction.i believe it was the points ,no, the rotor !

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

I've got good all the way to the coil. Then nothing. How do I check a rotor?

 

[boobie]

Re: 1963 evinrude spedifour 75hp. no spark

With out the proper test equipment, just replace it. Will the spark jump a 1/4" open air gap from the button on the coil ??

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

From the botton to where? Do I just hold the cap near the button and fire it up?

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

Spark doesn't jump. There is no spark

 

[Daviet]

Re: 1963 evinrude spedifour 75hp. no spark

If the rotor is defective the spark will go through it and ground out on the metal shaft the rotor sits on.
If you remove the cap and spin the engine over, do you get a spark at the points when they open and close, if so replace the rotor.

 

[Chris1956]

Re: 1963 evinrude spedifour 75hp. no spark

Rotors can be intermittent. They can work fine until the motor heats up and then arc to ground. First get spark to coil button. Clean points and check wiring. If those are good, replace condenser. Check coli for cracks.

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

Daviet havnt checked that yet been busy. Chris it has new coil points have been cleaned and checked. Condenser seems OK. Do not know what's going. On. Loosing my mind tho I do know that

 

[Joe Reeves]

Re: 1963 evinrude spedifour 75hp. no spark

From the botton to where? Do I just hold the cap near the button and fire it up?

Cheap spark tester.... attach a piece of wire with a alligator clip to the coil button, attach the other end of the wire with a alligator clip to the shank of a small screwdriver. Hold the shank of the screwdriver 1/4" away from the powerhead while someone cranks the engine.

If you have spark from the coil... replace the rotor, part #580260.

If still no spark... bad condenser, dirty points, points set wrong, wire on side of magneto that leads to points and coil is grounded, something of that nature.

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

OK so I took it to a buddy and he chased some bad wires and is getting spark. Now the problem is the people who owned it before me ruined the plug wires. How do I change them? They won't screw out and are like soldered in. Do I need to replace wires and cap

 

[boobie]

Re: 1963 evinrude spedifour 75hp. no spark

Try harder to screw them out. If they won't, yes you'll need a new cap and wires.

 

[ctaylor2069]

Re: 1963 evinrude spedifour 75hp. no spark

OK so I might be confused but. Do they screw out from inside or from outside? The wire is just coming apart

 

[boobie]

Re: 1963 evinrude spedifour 75hp. no spark

From the outside. They could be corroded. Try some PB Blaster on them.