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spark plugs for 2002 225 Optimax

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  • spark plugs for 2002 225 Optimax

    What is the current correct NGK spark plug number for a 2002 225 Optimax? I hear that Merc has changed from the PZFR5F-11 to something else.Also what else works in Champion or other brands?Thanks,dougj

  • #2
    Re: spark plugs for 2002 225 Optimax

    I don't know of any switches from the PZF. It is a great plug but it burns in the wallet. I have surviced many optimax'. Some people didn't like the idea of spending 16.50 a plug and tried something else my advice is don't. Those NGKs are expinsive for a reason, they have an iridium tiped electrode that doesn't wear near as fast as anything else. Since the Opti. is a dfi the spark plug is igniting a stratified fuel charge which requires a much hotter spark. The CDMs throw about 50,000 volts each time, wich will make short work of most plugs. stick with the NGKs!


    • #3
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      Re: spark plugs for 2002 225 Optimax

      The proper spark plug for that engine is the NGK "IZFR5G" the Mercury part number is "33-889597 001" with a srp of $15.10 Make sure to gap then at (0.031) and don't use a gapper that pushes on the center electrode.