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Evinrude 25hp 1990 spark plug question

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  • Evinrude 25hp 1990 spark plug question

    Hi,
    I'm running an evinrude 25hp Ls electric start motor. I've read that the recommended spark plug is the champion QL77JC4. I went to my local motor factors and he supplied me with the equivalent NGK plug and told me they the exact same. He also told me that they were pre-set and didn't need adjusting....

    Also iv'e heard that the plugs need to facing a certain direction??

    On the water yesterday and I got the feeling she wasn't running as well as the time before.....

    Any advice?

  • #2
    Re: Evinrude 25hp 1990 spark plug question

    Plug direction is critical on DFI motors, not yours. Get the proper Champion plugs and see what happens.

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    • #3
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      Re: Evinrude 25hp 1990 spark plug question

      Do you think this will make a difference? Also do the plugs come with the gaps pre-set? Forgot to mention the plugs that I took out of the engine(bought second hand) were NGK too.

      Mike

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