1960 75HP no spark need help

[horton]

Hello all, I need some help. I have a 60 johnson 75 hp model#V4S-12, mag.ingnition system. and have on spark. I replaced the coil, points, condenser. points gap is set at.020. The cap and wires are in good shapr checked with volt meter. But no spark.Any info would be a big help.Is there a chance that the shaft is bad? Thanks HJB

 

[DHPMARINE]

Re: 1960 75HP no spark need help

HJB,To be honest it has been about 10 years since I've worked on this ignition system.BUT (always seems to be one) I remember it was great because you can put the whole ignition system in a bench vise,and spin it with a rope until it worked.And it would fire four plugs very easily.<br /> My guess is to pay attention to the brass strip that brings the juice to the cap,make sure the rotor isn't shorted to the shaft,and I remember insulation problems on the terminal thru the housing.<br />Good Luck, DHP

 

[Joe Reeves]

Re: 1960 75HP no spark need help

Remove the magneto distributor cap. Rig a spark tester directly to the main coil terminal. If you have spark at that point, replace the rotor.<br /><br />Use Rotor #580260 (Wide Flared Tip)<br /><br />DO Not Use #580338 (Plain Straight Square Tip)

 

[seahorse5]

Re: 1960 75HP no spark need help

To rule out boat or engine wiring problems, disconnect the wire on the side of the magneto that is connected to the main harness. Leave the wire that goes to the points. Now see if you have spark, if so, trace the wiring system to see where it is grounded, or if the key switch is faulty. If you don't have spark, follow Joe's advise, it's right on.

 

[R.Johnson]

Re: 1960 75HP no spark need help

One thing I have found several times on these magneto's is that the coil will have burned a hole through it's case an goes to ground. Pull the coil, and see if this is the case.

 

[horton]

Re: 1960 75HP no spark need help

thanks for all the replies,I did the test joe said and sure enuff that was the problem (rotor bad) now just have to find one. Anybody have a guess on a price, hopefully not as bad as the cap ($150.00) well thank all for the help I owe ya.<br /><br />Horton

 

[Joe Reeves]

Re: 1960 75HP no spark need help

HJB.... That rotor is probably around $12.00 to $15.00 (in that area). Any Evinrude/Johnaon dealership should have it. If not, I have one left that I'd sell. If it comes to that, see my address below.

 

[seahorse5]

Re: 1960 75HP no spark need help

The #580260 rotor is an available part thru any J/E dealer that lists for 16.58.

 

[horton]

Re: 1960 75HP no spark need help

Thanks again. I found one today, it took a while but I got it. I'll give ya the results in a few days Horton