1968 55hp TR-10R troubleshooting Help

[Kharrity86]

Still trying to get the 1968 55hp TR-10R to start. So far I have cleaned and set the points(points were corroded enough to not get a signal). They test fine with the Ohm meter now, even got the motor to fire a few times but would not run. The stator looks good I think but I haven't tested it yet. Got excited when I realized the points weren't working at first, was hoping they were the only issue.
The problem I'm having now is blowing the 20 amp fuse on the green wire from the ignition switch. This wasn't happening at first but now it blows the fuse either after cranking the starter for a few seconds or sometimes just when I re-connect the battery after changing out the fuse. Motor has new plugs and also just rebuilt the carbs before trying to start it. Compression 120 on all cylinders. Also just installed new motor wiring harness, rectifier, and coil.

 

[F_R]

Well, obviously, you have a shorted wire or bad component somewhere. I don't know of any way we can tell where from a distance. I suppose a place to start would be to disconnect all the red wires from the ignition switch and reconnect them one at a time. Of course whatever is disconnected won't work

OR take a guess and unplug the rectifier. Could be blown to ground. EDIT: Disregard this suggestion. Charge current doesn't go through the fuse.

 

[Kharrity86]

Thank you for the idea! I’m going to start with that tomorrow. Could the starter solenoid somehow cause this?

 

[F_R]

Thank you for the idea! I’m going to start with that tomorrow. Could the starter solenoid somehow cause this?

extremely unlikely

 

[Kharrity86]

Got it running. The short was in the CDI box. Got a new one and it seems to be running great!