No spark

[cas3]

Tinker is...partly correct. too much for an earlier car with a resistor, but the 50 merc should have a can coil on it, with its own resistance built in. I would next go to step two, check the coil itself, post # 6

[Tinker]

Originally Posted by cas3

Tinker is...partly correct. too much for an earlier car with a resistor, but the 50 merc should have a can coil on it, with its own resistance built in. I would next go to step two, check the coil itself, post # 6

Yes I originally posted about the underdash resistor and voltage, then reread this was about a 50 merc and deleted.


No spark is coming from something going on in the dizzy I'd guess, since you've changed out the coil and condenser. But I'd test everything. Assuming the points are good and gapped and the timing is set.