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2003 350 MPI, should I change plugs? What kind?

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Old 04-06-2005, 07:20 AM
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Default 2003 350 MPI, should I change plugs? What kind?

I don't believe that the plugs have been changed in this motor since it was new. I was wondering if it should be done this spring before I take it to the river. If so, what would be the best plug to buy? thanks.
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Old 07-19-2005, 09:19 AM
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Default Re: 2003 350 MPI, should I change plugs? What kind?

depending on serial no om3000000& above use ngk tr 55 ix
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Old 07-19-2005, 09:23 AM
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Default Re: 2003 350 MPI, should I change plugs? What kind?

Originally Posted by ajl marine
depending on serial no om3000000& above use ngk tr 55 ix
otherwise bpr6efs
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