Thunderbolt ignition

[Farandaway]

Does anyone know if the ‘77 MerCruiser 454 with the Thunderbolt ignition has points and a condenser? I don’t see any listed on a parts diagram.
We always used to change points, plugs, condenser, and cap all at the same time on our cars. I’m not very familiar with the Thunderbolt ignition.

 

[rslifkin]

Thunderbolt was generally Mercruiser's name for electronic ignition systems. 1977 is older than the Thunderbolt IV system I'm familiar with, but it's almost certainly electronic (no points / condenser).

 

[Farandaway]

Thanks!!

 

[Farandaway]

Actually, one more question. So on this system, besides the cap and rotor what else should be replaced? Not counting plugs.

 

[rslifkin]

Cap, rotor, plugs, and wires should be the only maintenance parts. On an electronic ignition everything else stays unless something fails.