Distributor cap, rotor, plug wires and plugs

[CDAWaves]

Wondering what a good interval is for changing out distributor cap, rotor, plug wires and plugs. As far as I know they have never been changed and it's 10 yrs and 500+ hrs. The boat still runs perfect so should I leave it alone or preventative maintenance? If I change one should I change them all? I can pull the cap and rotor and inspect but wondering if I should just change them given the amount of time and hours or if it runs good just leave it alone. Searched all over and have not found any good info about this.


2005 24V with MP 340
500+ hrs

[dom w. forte]

We inspect the cap and rotor at every service and only replace if there is corrosion crust on the terminals, as to the plugs we inspect around 500 hrs and if they show fouling or wear we replace but normally they will go about 700hrs, as to the plug wires we rarely have any problems with them.

[CDAWaves]

Thanks for the help Dom.