need quality parts
 

I have a 32 foutain 2000 with twin 502s stock I want to replace spark plugs caps rotors and wires. I need to know what type of quality parts I should buy part numbers would help, I dont even know what type of plugs I should run. Had the boat 2.5 years figure those are well over due by now. Been putting it off becuase plugs look really hard to change. I did a bilge pump last year and that was a project in itself.

Just go to mercruiser website... Should have diagrams and part numbers as well as recommended plug types, etc...

Spark Plugs are NGK BR6FS. You can get them at any auto parts store.

The Sierra Marine Ignition stuff is just as good as Merc stuff and cost much less.

Cap & Rotor kit http://www.go2marine.com/product/159...-808483q2.html

thank you

I have not had trouble with stock Mercury parts but I now use these marine parts from Summit.

ACC-8132 cap and rotor - brass terminals don't oxidize like stock aluminum ones do
MSD-31489 plug wires - high quality but a couple of the lengths seem tight(short?)
NGK-2623 spark plugs BPR6FS - projected nose plugs give me a better burn

My 502 is the same model as yours. Yes 502 Mag MPI.

x 2 on brass terminals vs stock GM/Merc asluminum ones.

BTW, what kind of 502? There are a few variations. MPI Black/ Blue/Carb/Supercharged.

Mpi black

Sierra uses brass. I'm generally not a big fan of Sierra stuff, but the ignition stuff is pretty good.

http://www.keitheickert.com/p-13771-...x-tapered.aspx

http://www.keitheickert.com/c-142-ignition-systems.aspx