1968 35HP merc spark problem

[grizz11]

I was given a 1968 35HP merc Magneto system. I have installed new points, condensers, when using a ohmmeter on the terminal block it shows continuity when I open the points no change. However if I discount the ground wire on the laminated core and run the test have continuity with the points closed and then with the points open it test correctly.

I have no idea what my problem is?

 

[17.5cobra]

Re: 1968 35HP merc spark problem

Have you checcked the ground itself ... Is it well grounded????
I had a similiar problem and the bad ground was my problem.

 

[grizz11]

Re: 1968 35HP merc spark problem

I think the ground is good. When I put a spark plug light tester on and ground it to the motor the spark comes through however I think is coming from the ground to the tester.

 

[Laddies]

Re: 1968 35HP merc spark problem

Your OHM meter is reading the ground through the primary winding in the coil. that's normal. It should read .50 to .65 resistance