I’m going to winterize the 625’s and I am going to try to knock out all the overdue maintenence. I’m planning on coolant change, impellers, spark plugs, fuel filters, air filters, oil and filters. I pulled a couple plugs just to assess their condition and assumed I would just go to the local auto parts store and get some spark plugs. I did a search and could not find anything. I even went on Champions website and came up empty. The number on the plug is Champion RC12ECC. I also would like to know the automotive part number for the early fuel system high pressure fuel filter?
Also anything else I should do maintenance wise? The engines are 2006 with 182 hrs. Thanks

The Champion spark plugs can be searched with Champion 438.

Agree